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Hytrin (Terazosin)

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Hytrin is a high-quality medication which is taken in treatment of hypertension. It is also used in the treatment of benign prostatic hyperplasia. It is working by tightening of a certain type of muscle in the prostate and at the opening of the bladder.

Other names for this medication:

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Also known as:  Terazosin.


Hytrin is an effective remedy against hypertension. Its target is the treatment of benign prostatic hyperplasia.

Hytrin is working by tightening of a certain type of muscle in the prostate and at the opening of the bladder.

Hytrin is also known as Terazosin, Terapress.


Take Hytrin tablets orally with or without food.

Do not crush or chew it.

Take Hytrin at the same time once a day with water.

If you want to achieve most effective results do not stop taking Hytrin suddenly.


If you overdose Hytrin and you don't feel good you should visit your doctor or health care provider immediately. Symptoms of Hytrin overdosage: fainting, shock, dizziness.


Store at room temperature between 20 and 25 degrees C (68 and 77 degrees F) away from moisture, light and heat. Higher temperatures may cause the capsules to soften or melt. Throw away any unused medicine after the expiration date. Keep out of the reach of children.

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Side effect occurrence does not only depend on medication you are taking, but also on your overall health and other factors.


Do not take Hytrin if you are allergic to Hytrin components.

Do not take Hytrin if you're pregnant or you plan to have a baby, or you are a nursing mother.

Try to be careful using Hytrin if you are taking nonsteroidal anti-inflammatory painkillers such as Motrin and Naprosyn, other blood pressure medications, such as Dyazide, Vasotec, Verelan, Calan.

If you want to achieve most effective results without any side effects it is better to avoid alcohol.

Be careful in case of machine driving.

Do not stop taking Hytrin suddenly.

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A new sensitive and selective preconcentration-fluorimetric method for determination of terazosin based on its native fluorescence was developed. The analyte, initially present in aqueous matrix, was treated with an extractive non-ionic surfactant solution and separated by the clouding phenomenon. The optimum analytical conditions for terazosin assay were established. Under these conditions, linear calibration curves were obtained over the range of 1x10(-5) to 7.0 microg mL(-1) with detection and quantification limits of 1.11x10(-5) and 3.7x10(-5)microg mL(-1), respectively. Additionally, the binding constant (K(B)) for the terazosin-PONPE 7.5 system was determined given a value of 1028 L mol(-1). The developed coupled methodology, which thoroughly satisfies the typical requirements for pharmaceutical control processes, was proved to be appropriate for monitoring terazosin in actual pharmaceutical formulations and biological fluid sample. The results were validated by recovery test and by comparison with other reported methods, being highly satisfactory.

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This randomized, placebo-controlled, double-blind study was performed to evaluate the efficacy and safety of once-a-day terazosin (10 mg/day) in ambulatory patients (n = 57) with benign prostatic hyperplasia (BPH). After a 4-week placebo lead-in and a 24-week treatment period with terazosin (both single-blind), 30 patients who responded to terazosin were randomly assigned to either the terazosin or placebo treatment group for 12 weeks. During the single-blind treatment period, the peak urine flow rate increased 54% from a baseline average of 7.76 ml/sec to 11.92 ml/sec after terazosin; the mean flow rate increased 55% from a baseline of 4.90 ml/sec to 7.59 ml/sec; and the residual volume decreased 56% from 93.1 ml to 40.7 ml. The mean obstructive symptom score, irritative symptom score and physician's global assessment score improved by 68%, 34% and 27%, respectively. All these changes were significant (P less than 0.05) when compared to baseline values. During the double-blind period, the improvement in all the variables was sustained in the terazosin group but not in the placebo group. Peak and mean urinary flow rates, and physician's global assessment showed significant (P less than or equal to 0.05) differences at the end of the double-blind period. Adverse events occurred only during the single-blind period. The most frequent were headache (n = 6), asthenia (n = 3), and hypotension (n = 3). In summary, terazosin administered once-a-day improved the obstructive and irritative symptoms of BPH, urine flow rates and residual volume. Terazosin was well tolerated.

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The long-term treatment of essential hypertension with terazosin, a new once-a-day alpha 1-adrenergic blocking agent, was evaluated in 364 hypertensive patients who received total daily doses of 1 to 40 mg for 3 weeks to 56 months. Consistent mean decreases in supine and standing systolic and diastolic blood pressures were observed throughout the study for patients treated with terazosin as monotherapy (supine, 9 to 12/10 to 13 mm Hg; and standing, 12 to 18/11 to 14 mm Hg) or in combination with other antihypertensive agents (supine, 12 to 16/12 to 15 mm Hg; and standing, 16 to 22/13 to 19 mm Hg). The most commonly reported adverse experiences were dizziness, headache, asthenia, cold symptoms, and nasal congestion. Adverse effects and metabolic disorders often associated with diuretics and beta blockers such as sexual dysfunction, hyperglycemia, hyperuricemia, hypokalemia, or adverse lipid effects were seen infrequently during long-term treatment with terazosin as monotherapy. Overall, terazosin was shown to be effective, safe, and well tolerated by most patients.

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Benign prostatic hyperplasia (BPH) is a common disorder in older men and may be associated with lower urinary tract symptoms (LUTS) and sexual dysfunction. Men who present with symptomatic BPH and LUTS are at increased risk for sexual dysfunction, including erectile dysfunction (ED) and ejaculatory dysfunction (EjD).

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The effects of i.v. infusion of the alpha1-adrenoceptor antagonists doxazosin and terazosin (2 mg kg-1 h-1) on spontaneous hypogastric, renal and inferior cardiac nerve activity, spontaneous bladder contractions, blood pressure, heart rate and femoral arterial flow were investigated separately in alpha-chloralose-anaesthetized cats. Both drugs caused a reduction in hypogastric nerve activity associated with no overt changes in spontaneous bladder contractions. Doxazosin was more potent than terazosin, in that there was a significant reduction in hypogastric nerve activity after 20 min (0.67 mg kg-1) of infusion, while for terazosin this occurred after 40 min (1.33 mg kg-1). Both drugs also caused significant falls in blood pressure of 34 +/- 3 mm Hg and 33 +/- 4 mm Hg after 60 min. This was associated with no change in heart rate for doxazosin while terazosin caused an initial and significant increase in heart rate of 20 +/- 3 beats min-1 by 5 min, declining by 30 min to 1 +/- 5 beats min-1. This terazosin-induced tachycardia was associated with a significant increase in cardiac nerve activity of 128 +/- 22%. Both drugs caused increases in renal nerve activity however only for doxazosin was this increase significant. Femoral arterial conductance was also increased by both drugs, however, for doxazosin this increase was immediate and larger over the infusion period. These results demonstrate that alpha1-adrenoceptor antagonists can reduce sympathetic drive to the bladder and related organs.

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No evidence of heterogeneity was found in the estimated effects of terazosin on the change in peak flow rates in the studies. Terazosin treatment was associated with an increase in the peak flow rate of 1.4 mL/s (95% confidence interval [1.0, 1.7]) compared with placebo. Terazosin resulted in an average reduction of 2.2 points over placebo (95% confidence interval [1.6, 3.0]) regarding the common symptom score (range 0 to 36 points). A mild heterogeneity was found across the studies, with the decrease in symptom score slightly greater with longer treatment duration. No evidence was found that the baseline prostate volume influenced the effect of terazosin.

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Tadalafil augmented the hypotensive effects of doxazosin but had little hemodynamic interaction with tamsulosin. In patients taking tadalafil for ED, tamsulosin 0.4 mg may be given for the treatment of benign prostatic hyperplasia.

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Ninety-two male Sprague-Dawley rats were randomized to 1 of 5 groups: double-placebo control (n = 15), nicotine opposed by oral placebo (n = 26), nicotine opposed by subcutaneous placebo (n = 16), nicotine opposed by oral terazosin (n = 21), and nicotine opposed by subcutaneous terazosin (n = 14).

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Symptomatic benign prostatic hyperplasia (BPH) is a common condition in older men and has a significant impact on their daily lives. Transurethral resection of the prostate is currently the most effective remedy for BPH but is not suitable for all patients. There is now clear evidence for the efficacy of alpha-adrenoceptor antagonists, particularly selective alpha 1-adrenoceptor antagonists, in the treatment of BPH. Inhibition of alpha-adrenoceptors significantly increases urinary flow and improves symptoms in BPH. alpha 1-Adrenoceptor antagonists have a place in the management of BPH patients with mild to moderate disease, who are bothered by their symptoms, or for those awaiting or wishing to delay surgery. Treatment with selective alpha 1-adrenoceptor antagonists is generally better tolerated than nonselective-alpha-blockers. alpha 1-Selective adrenoceptor antagonists with a long half-life such as terazosin, doxazosin and tamsulosin, as a modified release formulation, permit once-daily dosing. Tamsulosin is the first subtype-specific (cloned alpha 1c/functional alpha 1A) adrenoceptor antagonist in clinical practice. Initial reports suggest that it gives no clinically relevant lowering of blood pressure and that its (vasodilatory) side effect profile is minimal. The scientific rationale behind the therapeutic use of alpha-adrenergic blockade as treatment for BPH and the trials data relating to the various agents which are available for clinical use are reviewed in the context of the contemporary literature.

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Traditional Chinese medicine (TCM) has been proposed to prevent urolithiasis. In China, Flos carthami (FC, also known as Carthamus tinctorius) (Safflower; Chinese name: Hong Hua/) has been used to treat urological diseases for centuries. We previously performed a screening and confirmed the in vivo antilithic effect of FC extract. Here, ex vivo organ bath experiment was further performed to study the effect of FC extract on the inhibition of phenylepinephrine (PE) (10(-4) and 10(-3) M) ureteral peristalsis of porcine ureters with several α 1-adrenergic antagonists (doxazosin, tamsulosin, and terazosin) as experimental controls. The results showed that doxazosin, tamsulosin, and terazosin dose (approximately 4.5 × 10(-6) - 4.5 × 10(-1) μg/mL) dependently inhibited both 10(-4) and 10(-3) M PE-induced ureteral peristalsis. FC extract achieved 6.2% ± 10.1%, 21.8% ± 6.8%, and 24.0% ± 5.6% inhibitions of 10(-4) M PE-induced peristalsis at doses of 5 × 10(3), 1 × 10(4), and 2 × 10(4) μg/mL, respectively, since FC extract was unable to completely inhibit PE-induced ureteral peristalsis, suggesting the antilithic effect of FC extract is related to mechanisms other than modulation of ureteral peristalsis.

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EjD related to medical treatments for LUTS.

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We investigated the frequency of prescription of alpha-blockers and PDE5Is from 3 general hospitals from January 1, 2007 to December 31, 2009. For alpha-blockers, data were collected from patients to whom alpha-blockers were prescribed from among patients recorded as having benign prostatic hyperplasia according to the 5th Korean Standard Classification of Diseases. For PDE5Is, data were collected from patients to whom PDE5Is were prescribed by the urology department and by other departments. Alpha-blockers were classified into tamsulosin, alfuzosin, doxazosin, and terazosin, whereas PDE5Is were classified into sildenafil, tadalafil, vardenafil, udenafil, and mirodenafil.

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alpha(1)-Adrenoceptors of the locus coeruleus (LC) have been implicated in behavioral activation in novel surroundings, but the endogenous agonist that activates these receptors has not been established. In addition to the canonical activation of alpha(1)-receptors by norepinephrine (NE), there is evidence that dopamine (DA) may also activate certain brain alpha(1)-receptors. This study examined the contribution of DA to exploratory activity in a novel cage by determining the effect of infusion of various dopaminergic and adrenergic drugs into the mouse LC. It was found that the D2/D3 agonist, quinpirole, which selectively blocks the release of CNS DA, produced a dose-dependent and virtually complete abolition of exploration and all movement in the novel cage test. The quinpirole-induced inactivity was significantly attenuated by coinfusion of DA but not by the D1 agonist, SKF38390. Furthermore, the DA attenuation of quinpirole inactivity was blocked by coinfusion of the alpha(1)-adrenergic receptor antagonist, terazosin, but not by the D1 receptor antagonist, SCH23390. LC infusions of either quinpirole or terazosin also produced profound inactivity in DA-beta-hydroxylase knockout (Dbh -/-) mice that lack NE, indicating that their behavioral effects were not due to an alteration of the release or action of LC NE. Measurement of endogenous DA, NE, and 5HT and their metabolites in the LC during exposure to the novel cage indicated an increase in the turnover of DA and NE but not 5HT. These results indicate that DA is a candidate as an endogenous agonist for behaviorally activating LC alpha(1)-receptors and may play a role in the activation of this nucleus by novel surroundings.

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This study was designed to evaluate the safety and efficacy of the selective alpha 1-adrenoceptor blocker terazosin in the treatment of benign prostatic hyperplasia (BPH).

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The incidence of heart attack and stroke undergo diurnal variation. Molecular clocks have been described in the heart and the vasculature; however it is largely unknown how the suprachiasmatic nucleus (SCN) entrains these peripheral oscillators.

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The ability of the quinazoline derived alpha1-adrenoceptor antagonists doxazosin and terazosin to induce apoptosis in benign and malignant prostate cells has been established. In this study we investigated the effect of the 2 piperazidinyl quinazoline based alpha1-adrenoceptor antagonists and the methoxybenzene sulfonamide alpha1-antagonist tamsulosin on human prostate cancer cell adhesion.

hytrin drug classification

We determined if alpha1 receptor antagonism at the hypoglossal motor nucleus (HMN) decreases genioglossus (GG) activity consistent with a role for an endogenous noradrenergic drive contributing to GG activation across sleep-wake states. We also determined if alpha1 receptor stimulation could counteract reduced endogenous noradrenergic drive and increase sleeping GG activity.

hytrin bph dosage

Relevant information was identified through a search of MEDLINE (1966-June 2010), International Pharmaceutical Abstracts (1970-June 2010), and EMBASE (1947-June 2010). Randomized, controlled trials that examined prostate cancer, benign prostatic hypertrophy, or procedures related to the prostate (ie, biopsies) were excluded.

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We have previously demonstrated that low dose of inhaled dopamine (0.5-2 microg kg(-1) min(-1)) induces broncodilatacion in patients with acute asthma attack, suggesting that this dopamine effect is mediated by dopaminergic rather than by adrenergic receptors. To understand better these dopamine effect, rat tracheal smooth muscle was used as a model to evaluate the responses of beta2-, alpha1-, alpha2-adrenergic and DA1 and DA2 dopaminergic antagonists. Tracheal rings from male Sprague-Dawley rats (n = 90) were excised and placed in an organ bath containing modified Krebs-Ringer bicarbonate buffer at 37 degrees C, and gassed with O2 (95%) and CO2 (5%). Contractile responses were recorded with an isometric transducer in a polygraph (Letica, Spain). Contraction was induced by accumulative doses of acetylcholine (0.1, 0.3, 1, 3, 10 mM) or by electric field stimulation (10 Hz at 2 milliseconds), and accumulative doses of dopamine were added to the bath. Low concentration (0.1-0.3 mM) elicited a small initial contraction, followed by a marked relaxation. Cholinergic contraction was completely reversed at 6 mM of dopamine. This biphasic dopaminergic response was not blocked by incubation with beta2-adrenergic antagonist propranolol (0.1 microM), alpha1-antagonist, terazosin (0.1 mM), alpha2-antagonist, yohimbine (0.1 mM), or by DA2 antagonist metoclopramide (1-8 mM); DA1 antagonist SCH23390 (0.1 microM) produced a sustained increase of basal tone but did not block initial dopaminergic contraction and partially inhibited bronchodilator effect of dopamine. Dopaminergic relaxation in rat trachea is mediated by DA1 rather than by DA2 receptors; and adrenergic receptors are not involved in such dopamine-induced response. Finally, DA1 antagonist SCH23390 exerts intrinsic contractile activity on airway smooth muscle that deserves further research.

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The phenomenon of polymorphism is prevalent in pharmaceuticals, yet it is unusual to identify more than three or four forms for any particular drug. Terazosin hydrochloride has been found to exist at room temperature in four solvent-free forms that can be isolated directly, one solvent-free form that can be prepared by desolvation of a methanolate, a methanol solvate, and a dihydrate. This study presents characterization and methods for preparation of each of these forms. Data are also presented demonstrating the relative stability of these forms.

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We analyzed the prescriptions of alpha-blockers and phosphodiesterase 5 inhibitors (PDE5Is) in the urology department as well as in other departments of the general hospital.

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Intraperitoneal epinephrine enhances the cerebral auditory evoked potential (AEP), an effect that is dependent on the basal forebrain cortical cholinergic system. The present study examined the hypothesis that ascending noradrenergic projections from brainstem autonomic substrates to the basal forebrain cholinergic system represent an essential component of the ascending pathway mediating this effect of epinephrine. Epinephrine again enhanced the AEP in rats, and this effect was attenuated by infusion of the selective alpha1 adrenergic antagonist terazosin into the basal forebrain. Moreover, infusions of the selective alpha1 adrenergic agonist phenylephrine into the basal forebrain mimicked the priming effects of epinephrine. Results support the hypothesis that noradrenergic afferents to the basal forebrain cholinergic system represent a component of an ascending visceral afferent system.

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Continuous cystometry was performed in conscious, freely moving rats with and without bladder outlet obstruction. Cystometric parameters were evaluated before and after intracerebroventricular drug administration.

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To investigate the effectiveness of terazosin, an alpha1-adrenoceptor blocking agent, on bladder neck obstruction (BNO), by assessing the urodynamic hydraulic energy profile. Patients, subjects and methods The study included 17 men (mean age 60.1 years, range 24-84), comprising 11 patients with BNO (mean age 66.5 years) and six normal volunteers (mean age 48.1 years). A five-transducer microtip catheter was used to measure the pressure in the bladder and at the bladder neck, and in the membranous and bulbous urethra during voiding. All the subjects then received terazosin, 1 mg/day orally for 2 weeks, and were re-assessed.

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The antihypertensive activity of terazosin, an investigational alpha 1-adrenergic-receptor blocker, and its effect on blood lipids were compared with placebo in a double-blind study. After a 3-week placebo baseline period, patients were randomized to receive terazosin (n = 22) or placebo (n = 16). The dose of terazosin was titrated over 2 weeks to a maintenance dosage of 10 mg once daily for 4 weeks. Antihypertensive efficacy was assessed: (1) at the end of the 24-hour dosing interval by comparing the average blood pressure (BP) after 3 and 4 weeks of maintenance therapy to the average BP after 2 and 3 weeks of placebo therapy, and (2) for 3 hours after drug ingestion at the final visit in comparison to the predose BP at that visit. At the end of the 24-hour dosing interval, 10 mg of terazosin reduced the mean supine systolic BP from 155.6 to 152.2 mm Hg and mean supine diastolic BP from 101.9 to 99.0 mm Hg (p less than 0.05). During the 3 hours after drug ingestion, mean supine systolic and diastolic pressures decreased maximally from 151.8 to 142.7 mm Hg (p less than 0.05) and from 99.5 to 91.0 mm Hg (p less than 0.05) respectively. No supine BP reduction differed significantly from the placebo response. During terazosin therapy there was a nonsignificant increase in mean body weight of 1.4 +/- 2.9 kg and no change in blood lipids. Thus the drug demonstrated greater antihypertensive activity 1-3 hours after ingestion than at the end of the 24-hour dosing interval.(ABSTRACT TRUNCATED AT 250 WORDS)

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Terazosin has been studied in a variety of clinical trials conducted in hypertensive patients with supine diastolic blood pressures of 95 mm Hg or greater before treatment. Blood pressure, pulse rate, body weight, clinical laboratory variables, and adverse experience data were evaluated periodically throughout each study. Patients generally were seen at weekly or biweekly intervals. Total daily doses of terazosin ranged from 1 to 40 mg. Terazosin was administered alone and in combination with other antihypertensive agents. Clinical trials consisted of double-blind, controlled studies and long-term, follow-up studies. The controlled clinical trials employed three principal designs: studies in which the dose was titrated according to blood pressure response; studies in which the dose was increased to a fixed level regardless of blood pressure response; and randomized withdrawal studies. Efficacy evaluations were based on mean blood pressure changes from baseline to the final visit and on the distribution of patient responses, which were categorized from excellent to inadequate. Safety evaluations were based principally on comparisons of specific safety parameters before and after the study.

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The total effective rate was 86.3% (69/80), 61.3% (49/80) and 17.5% (14/80) respectively in combined therapy group, medicine group I and medicine group II, indicating that the curative effect in combined therapy group was superior to that in other groups (P < 0.01, P < 0.05), and it in medicine group I was superior to that in medicine group II (P < 0.01). The Chinese medicine syndrome score was markedly reduced in combined therapy group (P < 0.01), and there was no obvious change in other groups (both P > 0.05). Urinary albumin (UMA) and urinary protein in 24 hours were notably reduced in combined therapy group and medicine group I (all P < 0.01), and it was more obviously in combined therapy group than that in other groups (P < 0.01, P < 0.05). The blood pressure was markedly reduced in all groups (all P < 0.05) after treatment, and there was no significant change in indices of liver and kidney functions (all P > 0.05).

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To determine the efficacy of an alpha-adrenoceptor antagonist, terazosin, in reducing nocturia in men with lower urinary tract symptoms (LUTS), and to identify the factors predicting treatment outcome.

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A total of 100 subjects, aged 20 to 50 years, who met the National Institutes of Health criteria for chronic prostatitis/chronic pelvic pain syndrome and had not previously been treated with alpha-blockers, were entered in a 14-week, double-blind comparison of terazosin or placebo therapy. Nonresponders and responders with subsequent relapse were treated with terazosin or other medications (open label). The criterion for response was a score of 0 to 2 on the National Institutes of Health Chronic Prostatitis Symptom Index quality-of-life item. The initial response was evaluated at week 14, and the long-term response was evaluated after a median of 38 weeks (range 34 to 42), regardless of any additional treatment. A durable response was defined as an initial response without additional treatment.

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hytrin 1mg tablets 2017-04-06

A total of 713 patients with hypertension were evaluated in eight randomized, double-blind, placebo-controlled trials of terazosin administered in single daily doses ranging from 1 to 40 mg. In three of these studies, terazosin or placebo was added to ongoing antihypertensive drug therapy. Patient response was categorized (from excellent to inadequate) according to the change in supine diastolic blood pressure from baseline and the value at the final visit. The distribution of patients in these response categories differed significantly between patients treated with terazosin and those treated with placebo. Overall, 52 percent of terazosin-treated patients in these eight studies, compared with 30 percent of placebo-treated patients, had good to excellent responses. Subgroup analysis revealed that blood pressure response was not dependent on sex or age, although white buy hytrin online patients appeared to achieve better responses to terazosin in comparison with placebo than did black patients. These studies demonstrate that terazosin administered once daily, either as monotherapy or in combination with other antihypertensive agents, effectively controls blood pressure in patients with mild to moderate hypertension.

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Administration of terazosin for patients with an internal ureteral stent relieved some stent-related symptoms such as flank pain, pain during voiding, frequency, nocturia and urgency, but had no effect on hematuria. buy hytrin online

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Antihypertensive effect, platelet aggregation, and plasma lipid profile were studied buy hytrin online in a group of 14 hypertensive patients with diastolic blood pressure between 96 and 116 mm Hg during placebo and terazosin phases. Terazosin, an alpha 1-adrenergic blocking agent, was given initially at the dosage of 1 mg daily. Then it was continued at a dosage of 2 mg daily and 5 mg daily respectively, each dosage for 4 weeks. Blood pressure was taken every 2 weeks. Ex vivo platelet aggregation induced by epinephrine, collagen, and adenosine diphosphate (ADP) were carried out twice during the first placebo phase, once at the end of each terazosin dosage, and once in the second placebo phase. Total cholesterol, HDL cholesterol, and triglycerides were measured at the end of first placebo and terazosin phases. Blood from eight patients was taken during the second placebo phase to carry out in vitro response of platelet aggregation induced by ADP, collagen, and epinephrine before and after incubation with terazosin (1, 2 and 5 micrograms/L or doxazosin (100, 200, and 500 micrograms/L for 5 min. Terazosin induced a statistically significant decrease in 14.2/8.0 mm Hg, 26.1/13.4 mm Hg, and 33.9/16.5 mm Hg in the supine position for 1, 2, and 5 mg/daily, respectively. No changes in heart rate were observed. Terazosin inhibited significant ex vivo platelet aggregation induced by epinephrine, collagen, and ADP in a range from 20% to 45% for different concentrations of inducers. Reductions in platelet aggregation seemed not to be dose dependent, as reductions were statistically equivalent for dosages of 1, 2, and 5 mg daily. Terazosin significantly reduced the level of total cholesterol (8.71%) and triglycerides (14.31%), and increased (although not significantly) levels of HDL cholesterol (3.91%). In vitro platelet aggregation was inhibited by doxazosin to a significant extent but not by terazosin.

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alpha-Adrenoceptor blocking activities and vascular relaxation activities of terazosin, a new antihypertensive agent, were studied. Terazosin had no effect on Ba2+, serotonin, angiotensin II and Ca2+ induced contractions in the isolated rat aorta. Terazosin competitively inhibited norepinephrine (NE) and phenylephrine (PE) induced contractions of the isolated rat aorta, and their pA2 values were 9.28 and 8.74, respectively. The potency of terazosin in the NE induced contraction was about 0.11, 8 and 176 times more than prazosin, phentolamine and yohimbine, respectively. The potency of terazosin in the PE induced contraction was about 0.09, 6 and 60 times more than prazosin, phentolamine and yohimbine. Terazosin (i.v.) competitively inhibited the PE induced pressor response. The "pA2" values of postsynaptic alpha-adrenoceptor blocking activity was 5.22, and its potency was about 0.05, 5 and 62.5 times more than prazosin, phentolamine and yohimbine, respectively. Terazosin (0.3 mg/kg, i.v. or less) did not show any significant effect on clonidine induced bradycardia during electrical stimulation of cardiac sympathetic nerve, whereas prazosin (0.3 mg/kg), phentolamine (0.1 mg/kg) and yohimbine (0.1 mg/kg) antagonized the effect of clonidine by 37%, 80.6% and 63.3%, respectively. Terazosin, 0.3 and 1 mg/kg, p.o., antagonized the PE (3 micrograms/kg, i.v.) induced pressor response buy hytrin online in conscious unrestrained rats. This effect lasted for 8 hr in the case of 0.3 mg/kg and lasted for 12 hr in the case of 1 mg/kg. Thus, it is strong suggested that the antihypertensive effect of terazosin is based on the postsynaptic alpha-adrenoceptor blocking action.

hytrin 2mg tablets 2017-01-01

Meal ingestion stimulates an increase in small intestinal water and electrolyte absorption. Endogenous norepinephrine may at least partially mediate this meal-stimulated proabsorptive response. Luminally administered alpha 1-adrenergic agonists such as norepinephrine and phenylephrine buy hytrin online cause significant small bowel absorption, which can be prevented by the selective alpha 1-adrenergic antagonist terazosin. This study tested two hypotheses: (1) a meal stimulates ileal water, electrolyte, and glucose absorption; and (2) meal-stimulated ileal absorption is mediated via alpha 1-adrenergic receptor activation. Absorption studies (N = 27) were performed on dogs with 25-cm ileal Thirty-Vella fistulas (TVF). Perfusion with [14C]PEG was used to calculate absorption of water, electrolytes, and glucose from the TVF. Three groups were randomly studied over 4 hr: (1) terazosin alone, (2) meal alone, and (3) terazosin plus meal. Terazosin (10(-4) M) was administered to the TVF in groups 1 and 3 following the first hour. A 480-kcal mixed canine meal was ingested at the end of the second hour in groups 2 and 3. Ileal water, electrolyte, and glucose absorption increased significantly in response to meal ingestion (P < 0.05). Luminal terazosin did not significantly alter basal or meal-stimulated ileal absorption. In conclusion, meal ingestion stimulates ileal absorption of water, electrolytes, and glucose. Neither basal nor meal-stimulated ileal absorption is altered by alpha 1-adrenergic receptor blockade. These data suggest that nonadrenergic neural pathways or humoral factors are the likely mediators of meal-induced intestinal absorption.

hytrin drug classification 2017-01-01

In patients with lower urinary tract symptoms suggestive of benign prostatic obstruction the alpha1-adrenoceptor antagonist terazosin lowers blood pressure whereas only very small if any alterations were reported with the alpha1-adrenoceptor antagonist tamsulosin. Therefore, we have compared the vascular alpha1-adrenoceptor antagonism of tamsulosin and terazosin directly. buy hytrin online

hytrin tablet 5mg 2015-09-05

A great number of clinical trials and systematic reviews have evaluated the efficacy and safety of α(1) blockers for benign prostatic hyperplasia (BPH). We carried out an overview of reviews to buy hytrin online provide an up-to-date summary of evidence regarding the efficacy and safety between different α(1) blockers for BPH.

hytrin prices 2017-05-11

The arteriovenous anastomoses (AVA) of the cutaneous microcirculation of the hands and feet are fundamental determinants of thermoregulatory blood flow and may be involved in cold intolerance. These direct microvascular studies are an initial characterization of adrenergic receptor subtypes participating in control of AVA in the ears of anesthetized male New Zealand White rabbits. Adrenergic alpha 1-stimulation with phenylephrine produced AVA constriction, whereas terazosin (an alpha 1-antagonist) produced dilation and attenuated the responses to phenylephrine. Adrenergic alpha 2-stimulation with UK-14304 produced constriction of the AVA, whereas atipamezole (an alpha 2-antagonist) produced dilation and attenuated the responses to UK-14304. When equimolar concentrations of antagonists were studied, the AVA dilation produced by alpha 2-blockade was buy hytrin online greater than that produced by alpha 1-blockade. Norepinephrine (a mixed alpha 1- and alpha 2-agonist) also produced vasoconstriction, which was attenuated by both prazosin (an alpha 1-antagonist) and atipamezole. In summary, 1) AVA contain a heterogeneous mixture of both alpha 1- and alpha 2-receptors, and 2) alpha 2-receptors may have a greater influence than alpha 1-receptors on overall tone in AVA.

hytrin user reviews 2015-03-19

The following databases were searched from inception to 6 August 2013 for published and unpublished research evidence: MEDLINE; EMBASE; Cumulative Index to Nursing and Allied Health Literature; The Cochrane Library including the Cochrane Systematic Reviews Database, Cochrane Controlled Trials Register, Database of buy hytrin online Abstracts of Reviews of Effects and the Health Technology Assessment database; ISI Web of Science, including Science Citation Index, and the Conference Proceedings Citation Index-Science. The US Food and Drug Administration website and the European Medicines Agency (EMA) website were also searched.

hytrin 1 mg 2016-06-08

The rationale for selective alpha 1 blockade in benign prostatic hyperplasia (BPH) is based upon the observations that the prostate adenoma contains between 20% and 40% smooth muscle and the contractile properties of prostatic smooth muscle are mediated by the alpha 1 adrenoceptor. Terazosin is a selective alpha 1 adrenoceptor antagonist that is currently under clinical investigation for the treatment of clinical BPH. The United States experience with this drug is reviewed in the present report. The outcome measures used to assess the efficacy of terazosin in BPH includes Boyarsky symptom scores and uroflowmetry. The total Boyarsky symptom score decreased 55% and the peak urinary flow increased 47% following terazosin therapy in the cumulative open-label and single-blind studies. Three hundred and thirteen subjects with clinical BPH were randomised into a phase III double-blind parallel-group 3-month placebo-controlled study of once-a-day administration of terazosin. The total Boyarsky symptom score decreased 43% and 21% in the 10 mg and placebo treatment groups, respectively. The peak urinary flow increased 37% and 12 buy hytrin online % in the 10 mg and placebo-treated groups, respectively. The adverse events associated with terazosin were relatively minor and reversible. The United States experience has unequivocally demonstrated the short-term safety and efficacy of terazosin therapy in BPH. Studies are currently under way to determine the long-term safety and efficacy associated with terazosin therapy in BPH.

hytrin maximum dose 2016-06-28

We conducted a systematic review to evaluate the effectiveness and adverse effects of the alpha-blocker, terazosin, for treatment of urinary buy hytrin online symptoms associated with BPO.

hytrin generic price 2016-02-06

In all, 4571 cases and an equal number of controls were identified. Current use of alpha-blockers (prazosin, doxazosin, indoramin, terazosin, alfuzosin and tamsulosin) was compared with non-use of alpha-blockers. Current use of alpha-blockers on the index date was associated with an increased risk of hip/femur fracture [adjusted odds ratio (OR) 1.9, 95% confidence interval (CI): 1.1-3.0] in the overall analysis. The effect was particularly strong for first prescriptions within a treatment episode (adjusted OR 5.1, 95% CI: 1.0-31.7) and during the first month of treatment buy hytrin online (adjusted OR 4.1, 95% CI: 0.7-23.9). Stratification according to indication of use showed that current use of alpha-blockers was not associated with hip/femur fracture in men with a diagnosis of benign prostatic hyperplasia (adjusted OR 1.0, 95% CI: 0.4-2.5), but was associated in men who used alpha-blockers for cardiovascular disease (adjusted OR 2.8, 95% CI: 1.4-5.4).

hytrin generic 2015-02-09

The role of alpha 1-adrenoceptors in the mediation of autonomic functions, particularly in the control of the cardiovascular system, is widely known. It has been shown that alpha 1-adrenoceptors localized in human prostate mediate the contraction of prostatic smooth muscles which produces an increase in the intraurethral pressure and thus, these receptors are important in the regulation of bladder outlet resistance. Alpha 1-antagonists such as prazosin relieve the symptoms of bladder outlet obstruction in men with symptomatic benign prostatic hypertrophy (BPH) by blocking alpha 1-adrenoceptors, thereby decreasing prostatic tone and urethral resistance. Thus, alpha 1-adrenergic stimulation may be one of the most important factors in the development of urinary obstruction in BPH. Alpha 1-adrenoceptors in human prostate have been buy hytrin online identified and characterized extensively by functional, radioligand binding and molecular biological techniques. These studies provide evidence in support of the concept that the alpha 1C-subtype forms the majority of alpha 1-adrenoceptors in human prostatic smooth muscles. It has been shown that YM617 (tamsulosin) and naftopidil have higher affinities to alpha 1-adrenoceptors in the prostate than in the aorta. Some alpha 1-antagonists, such as prazosin and terazosin, are not selective with respect to alpha 1-adrenoceptor subtypes, while others, such as 5-methylurapidil and indoramin, show higher potencies for alpha 1C-adrenoceptors and much lower potencies for alpha 1A- and alpha 1B-subtypes. In conclusion, the recent findings from pharmacological and molecular biological studies indicate that selective antagonists of alpha 1C-adrenoceptors could be effective in the treatment of urinary obstruction in symptomatic BPH with fewer cardiovascular side effects.

tab hytrin 1mg 2015-03-12

In men with clinical BPH finasteride and placebo are equally effective, while terazosin and combination are significantly more effective. In men with clinical BPH and large prostates the advantage of finasteride over placebo in terms of symptom reduction, impact on bother due to symptoms and quality of life is small at best, while the advantage of terazosin and combination over finasteride and placebo is highly significant. Baseline prostate volume was not a predictor of response to Tofranil Syrup finasteride in the overall study population. On the basis of our results alpha1 blockers, such as terazosin, should be first line medical treatment for BPH.

hytrin 15 mg 2017-12-23

More than 25% of primary care practitioners begin performing digital rectal examination after patient age 55 years. Compared to prostate specific antigen (PSA) 59% of practitioners believe that digital rectal examination is more sensitive or that the tests are equal, or they do not know. In regard to PSA 11% of respondents begin testing after patient age 60 years, 11% evaluate PSA only if digital rectal examination is abnormal and greater than 3% never evaluate PSA. Approximately 45% of primary care practitioners indicated that PSA of greater than 4.0 ng./ml. signifies prostate cancer regardless of patient age, prostate size or prostatis and 50% think that digital rectal examination elevates PSA in a clinically significant way. Although 93.2% of respondents refer a patient to a urologist after palpating a prostatic nodule, only 51.1% refer for an area of induration. Hyzaar Tablets Of the 47.2% of respondents who attempt pharmacotherapy for voiding dysfunction with finasteride, terazosin or both 15% do not know the agent mechanisms of action. Of those prescribing finasteride 68.6% are not aware of its effects on serum PSA. Overall 66.5% of primary care practitioners are not familiar with the American Urological Association Symptom Index while only 15% of those attempting pharmacotherapy use the index as a diagnostic tool.

hytrin tablets uses 2016-01-20

To evaluate the influence of prophylactic versus Augmentin Drug Interactions therapeutic alpha-blockers on urinary morbidity after permanent prostate brachytherapy. Multiple clinical and treatment parameters were evaluated to identify the factors associated with acute urinary morbidity.

hytrin open capsule 2017-02-05

The sympathetic nervous system has a key role in the physiological regulation of the circulation and may also mediate some of the factors that cause or sustain clinical hypertension. Most classes of antihypertensive drugs produce at least part of their effects by inhibitory actions on the sympathetic pathways. The centrally acting agents and the peripheral alpha-adrenergic blockers are the most specific currently used sympathetic inhibitors. The available alpha-blockers, prazosin and terazosin, effectively reduce blood pressure when used as monotherapy or in combination with other antihypertensive drugs. When given once daily, the actions of terazosin persist throughout the full 24-hour period, including the important midmorning hours when there may be heightened sympathetic activity. The incidence of symptomatic adverse effects Hytrin 2mg Tab with the alpha-blockers is low. Because they specifically block peripheral alpha-receptor-mediated vasoconstriction, the alpha-blockers decrease total peripheral resistance at rest and do not antagonize the appropriate vasodilatory responses to exercise. They maintain or increase blood flow in regional circulations; cerebral blood flow in elderly patients is unchanged despite significant decreases in systemic blood pressure. In contrast to other drug classes that can adversely affect the lipid profile, the alpha-blockers slightly decrease total cholesterol concentrations. Recent studies also have shown that terazosin and prazosin can promote decreases in echocardiographically measured left ventricular wall thickness and muscle mass in hypertensive patients with left ventricular hypertrophy. Thus, this type of sympathetic blockade not only produces antihypertensive effects, but additionally may have a beneficial impact upon other cardiovascular risk factors.

hytrin drug card 2016-01-16

The study inclusion criteria were a < 25% reduction in Flagyl Vet Medicine nocturia using the International Prostate Symptom Score question 7, a < 25% reduction in nocturia using the frequency-volume chart, and/or nocturia > or = 2/night (according to the frequency-volume chart) after 4 weeks of terazosin therapy. A total of 72 patients were entered into the study and treated with 25 mg of hydrochlorothiazide and 4 mg of terazosin once daily for 4 weeks. Of the 72 eligible men, 53 completed the study.

hytrin tablets 2mg 2015-09-26

Terazosin is an alpha1-selective adrenoceptor blocking agent that has been reported in many clinical trials to be an effective Duphaston Online choice for the treatment of benign prostatic hyperplasia (BPH). To improve cost-effectiveness, the development of an effective and well-tolerated generic formulation is needed.

hytrin 5 mg 2016-10-05

We obtained NIH-CPSI and IIEF-5 scores from 132 chronic prostatitis patients with ED and divided the patients into a control (n = 70) and a treatment group (n = 62), Lipitor Overdose the former treated with oral levofloxacin 0.2 g bid for 4-6 weeks and oral Terazosin at 2 mg qd for 2 months, and the latter with oral CXC once 2 capsules tid for 2 months in addition to the above.

hytrin drug medication 2015-11-12

The binding properties of a new radioligand, [3H]bunazosin, were studied in membranes of human prostates with benign prostatic hypertrophy (BPH). Specific binding of [3H]bunazosin was saturable, reversible, and of high affinity (Kd = 0.55 +/- 0.04 nM). The density of [3H]bunazosin binding sites (Bmax) was 676 +/- 33 fmol/mg. protein. [ Bactrim 480 Mg 3H]Bunazosin rapidly associated with its binding sites in membranes of human prostates and reached steady state by 20 min. at 25C. The rate constants for association and dissociation of [3H]bunazosin binding were calculated to be 0.11 +/- 0.01/nM/min. and 0.05 +/- 0.02/min. (n = 4), respectively. Seven alpha 1 adrenoceptor antagonists competed with [3H]bunazosin for the binding sites in the rank order: R-(-)-YM-12617 greater than prazosin greater than SGB-1534 greater than bunazosin greater than terazosin greater than naftopidil greater than urapidil. In parallel studies with [3H]bunazosin, the Kd and Bmax values for [3H]prazosin binding in human prostates were slightly lower. There was a similarity in the potency and rank order of seven alpha 1, adrenoceptor antagonists for the inhibition of [3H] bunazosin and [3H]prazosin binding in human prostates. The new [3H]bunazosin binding assay in human prostates is remarkable for its low degree of nonspecific binding as compared to [3H]prazosin, especially at high ligand concentrations. Thus, [3H]bunazosin may become a useful radioligand for the further analysis of the alph 1 adrenoceptor binding sites in human prostates.

hytrin dose range 2015-10-12

This open, multicenter phase III study was designed to assess the efficacy and long-term safety of terazosin (1 to 40 mg/day), alone or in combination with other antihypertensive drugs, in 364 patients with mild to moderate essential hypertension. Compared with baseline values, long-term terazosin monotherapy or combination therapy resulted in consistent decreases in both systolic and diastolic blood pressures, with a mean reduction in supine diastolic pressure of 12 to 14 mm Hg. The numbers of patients with controlled blood pressure at the last evaluable visit of each therapy period were as follows: terazosin alone, 106 of 245 (43%); terazosin with added diuretic, 70 of 112 (63%); diuretic with Claritin 5 Tablets added terazosin, 47 of 88 (53%); and terazosin plus diuretic with added beta-blocker, 22 of 32 (69%). Most adverse events were mild or moderate in severity. Only pain in extremities had a higher incidence during long-term treatment (6%, 181 to 360-day period) than during initial short-term treatment (5%, 1 to 90-day period). Three of six syncopal events occurred during the initial 180 days of treatment; this 0.8% (3/364) incidence was comparable with that reported previously for short-term studies. Only one case of syncope occurred during terazosin monotherapy. Terazosin was judged to be a safe and effective long-term medication for the treatment of hypertension.

hytrin 2mg tab 2015-06-03

Endothelins mediate contractile responses in many types of vascular and nonvascular smooth muscle. The present study represents the first detailed characterization of endothelins in the human prostate. The objectives of this study were to determine the tissue levels and source of endogenous endothelin-1 (ET1) in the human prostate. The contractile effects of ET1 were also investigated using in vitro isometric tension studies. The mean tissue level of ET1 was 0.58 +/- 0.08 pg./mg. tissue wet weight. Endothelin-like activity was markedly prominent in the glandular epithelium of the human prostate, whereas minimal endothelin-like activity was observed in the prostatic stroma. Strips of human prostatic tissue were suspended in isolated tissue chambers and challenged to a concentration response of ET1. The mean EC50 and Emax for ET1 was 3.2 x 10(-8) M. and 0.12 +/- 0.02 gm. force per mm.2 cross-sectional area (CSA), respectively. Preincubation with indomethacin, terazosin, or nifedipine did not alter the concentration-dependent response to ET1. A calcium-free buffer abolished the contractile response to ET1. Thus, ET1 mediates a potent contraction of human prostatic smooth muscle that is not mediated via alpha 1 adrenergic or dihydropyridine sensitive calcium channels or prostaglandin synthesis. The presence of marked Casodex Generic Cost endothelin-like immunoreactivity strongly suggests a biological significance for endogenous endothelins in the human prostate.

hytrin drug class 2016-10-31

The use of 5ARI therapy is a rational approach to symptom management and prevention of Lopressor Drug Class long-term negative outcomes in men with enlarged prostates.V 3.

hytrin patient reviews 2017-10-08

Terazosin has proved to be safe and results in significant improvement in bladder emptying in our patients with posterior urethral valves. Randomized controlled trial and long-term follow up are necessary to further define the role of alpha1 adrenergic blocker therapy in children with posterior urethral valves. This study will become the justification for such a study.

hytrin tab 2mg 2015-08-03

An older method for terazosin was reworked in order to reduce the analysis time from 90min (2×45min) to below 5min. The method in European Pharmacopoeia (Ph.Eur.) investigates the specified impurities separately. The reason of the different methods is that the retention of two impurities is not adequate in reversed phase, not even with 100% water. Therefore ion-pair-chromatography has to be applied and since that two impurities absorb at low UV-wavelength they had to be analyzed by different method than the other specified impurities. In our new method we could improve the retention with pH elevation using a new type of stationary phases available for high pH applications. Also a detection wavelength could be selected that is appropriate for the detection and quantification of all impurities. The method development is the bottleneck of liquid chromatography even today, when more and more fast chromatographic systems are used. Expert knowledge with intelligent programs is available to reduce the time of method development and offer extra information about the robustness of the separation. Design of Experiments (DoE) for simultaneous optimization of gradient time (tG), temperature (T) and ternary eluent composition (tC) requires 12 experiments. A good alternative way to identify a certain peak in different chromatograms is the molecular mass of the compound, due to its high specificity. Liquid Chromatography-Mass Spectrometry (LC-MS) is now a routine technique and increasingly available in laboratories. In our experiment for the resolution- and retention modeling the DryLab4 method development software (Version 4.2) was used. In recent versions of the software the use of (m/z)-MS-data is possible along the UV-peak-area-tracking technology. The modelled and measured chromatograms showed excellent correlations. The average retention time deviations were ca. 0.5s and there was no difference between the predicted and measured Rs,crit -values.