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Zantac

Generic Zantac is a high-quality medication which is taken in treatment of intestines, ulcers in the stomach, Zollinger-Ellison syndrome, gastroesophageal reflux disease (GERD) and other conditions of heartburn. Generic Zantac acts by decreasing the amount of acid produced in the stomach. It is a heartburn medicine.

Other names for this medication:

Similar Products:
Axid, Pepcid, Tagamet , Pepcid, Fluxid, Pepcid AC

 

Also known as:  Ranitidine.

Description

Generic Zantac is a perfect remedy in struggle against intestines, ulcers in the stomach, Zollinger-Ellison syndrome, gastroesophageal reflux disease (GERD) and other conditions of heartburn.

Generic Zantac acts by decreasing the amount of acid produced in the stomach. It is a heartburn medicine.

Zantac is also known as Ranitidine, Monorin, Histac, Ranitil.

Generic name of Generic Zantac is Ranitidine.

Brand names of Generic Zantac are Zantac, Zantac 150, Zantac 300, Zantac 300 GELdose, Zantac 75, Zantac EFFERdose, and Zantac GELdose.

Dosage

Generic Zantac is available in tablets (150 mg, 300 mg), capsules, syrup.

Before swallowing, fizzy tablets of 25 ml should be dissolved in 1 teaspoon of water.

Before drinking Generic Zantac granules should be mixed with 6 to 8 ounces of water.

The treatment can take more than 8 weeks.

Keep Generic Zantac away from children and do not share it with other people.

Take Generic Zantac tablets orally with water.

Do not crush or chew it.

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

Overdose

If you overdose Generic Zantac and you don't feel good you should visit your doctor or health care provider immediately. Symptoms of Generic Zantac overdosage: coordination, feeling light-headed, fainting.

Storage

Store at room temperature between 2 and 30 degrees C (36 and 86 degrees F) away from moisture, light and heat. Keep container tightly closed. Throw away any unused medicine after the expiration date. Keep out of the reach of children.

Side effects

The most common side effects associated with Zantac are:

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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.

Contraindications

Do not take Generic Zantac if you are allergic to Generic Zantac components.

Be careful with Generic Zantac if you're pregnant or you plan to have a baby, or you are a nursing mother.

Generic Zantac can increase a risk of developing pneumonia.

Be careful using Generic Zantac if you are taking triazolam (Halcion).

It can be dangerous to use Generic Zantac if you suffer from or have a history of kidney disease, liver disease, phenylketonuria (PKU), porphyria.

Avoid alcohol.

Do not stop taking Generic Zantac suddenly.

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An immigrant from India presented with a three months history of fever, weight loss, cough and hepatomegaly which were rapidly diagnosed as miliary tuberculosis when gastric lavage revealed acid-fast bacilli. One day after antituberculous therapy was commenced, the patient developed adult respiratory distress syndrome and disseminated intravascular coagulation which were successfully treated by corticosteroids, fresh frozen plasma and mechanical ventilation. Ten other survivors of miliary tuberculosis and adult respiratory distress syndrome were reviewed and the association of adult respiratory distress syndrome with the antimicrobial therapy is discussed.

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To provide effective ranitidine therapy at the lowest possible cost to institutions and patients, the main study objectives were to develop a dosage intervention strategy for intermittent intravenous ranitidine and to document the resultant cost savings through cost-minimization analysis. During a 6-week baseline phase, a pharmacy resident prospectively monitored all patients in the intensive care unit receiving intravenous ranitidine and evaluated appropriateness of dose according to creatinine clearance. Staff pharmacists collected identical data during the 6-week intervention phase but also made recommendations for dosage interval adjustment. In patients with creatinine clearance rates less than 50 mL per minute, the mean number of doses per patient treatment-day was reduced from 2.33 +/- 0.81 during baseline phase to 1.56 +/- 0.70 during intervention phase (P < 0.001). The hospital cost per patient treatment-day was decreased by 33%, from $5.29 +/- 1.83 to $3.54 +/- 1.59 (P < 0.001). Thus a program of prospective monitoring and verbal interventions by pharmacists effectively reduced the number of inappropriate ranitidine doses and hospital cost.

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Pituitary adenylate cyclase activating polypeptide (PACAP) is present in gastric nerves, and PACAP receptors (PAC1) are found on gastric enterochromaffin-like (ECL) cells. Expression of PAC1 splice variants in purified ECL cells was determined by RT-PCR. PACAP effects on ECL cells were analyzed by video imaging of [Ca(2+)](i) and histamine release; its effects on gastric glands were examined by confocal microscopy of [Ca(2+)](i) in ECL and parietal cells. PACAP action on D cells was measured by [Ca(2+)](i) and radioimmunoassay. PACAP effects on acid secretion were determined in fistula rats with or without neutralizing anti-somatostatin antibodies. All splice variants of PAC1 were found, but vasoactive intestinal polypeptide (VIP) receptor (VPAC) products were absent. PACAP-27 and -38 dose-dependently raise [Ca(2+)](i) in ECL cells, and stimulated histamine release. VIP had a much lower affinity, which demonstrates the presence of PAC1 but not VPAC. PACAP elevated [Ca(2+)](i) in ECL and parietal cells of superfused gastric glands, but only the parietal cell signal was inhibited by ranitidine, showing the absence of PAC1 on parietal cells, and demonstrating functional coupling between the cell types. PACAP and VIP stimulated calcium signaling and somatostatin release from D cells with almost equal efficacy. Acid secretion was stimulated after intravenous injection of PACAP into rats treated with somatostatin antibody. PACAP is a candidate as a mediator of neural regulation of acid secretion.

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Prolonged fasting and longer time between dosing and sampling reduced the plasma gastrin concentrations after omeprazole (80 mumol/kg x 2 for 14 days) treatment in male rats whereas the amounts of tissue gastrin were essentially unchanged during these initial experiments. After 28 days omeprazole (80 mumol/kg x 2) or ranitidine (375 mumol/kg x 4) that produced corresponding inhibition of acid secretion, increased the tissue gastrin content by 114 and 59%. A low dose of omeprazole (20 mumol/kg x 2) also raised the gastric gastrin content (41%), whereas no change was noted on treatment with a low dose of ranitidine (125 mumol x 4). Following recovery for 28 days no significant increases in gastrin were observed. 1, 3, 7, 14 or 28 days of treatment with omeprazole (80 mumol/kg x 2) gradually increased the gastric gastrin content being significantly raised already after 3 days. We conclude that a) measuring the tissue gastrin content may be the preferable method when changes in gastrin following long-term treatment with acid inhibiting drugs are to be determined, b) the amount of gastrin in the stomach increases rapidly following treatment with omeprazole and is approximately doubled following 28 days of treatment and c) after treatment for 28 days omeprazole was found to cause greater elevations in the tissue gastrin content than ranitidine despite similar degrees of basal acid inhibition.

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One hundred thirty-four patients were enrolled in the second-line study (56 men, 78 women; mean [SD] age, 51.1 [12.4] years; group 1A, 68 patients; group 1B, 66 patients). Subsequently, 41 (30.6%) of these patients were randomized to receive quadruple therapies. Using intent-to-treat (ITT) analysis, the eradication rates did not differ significantly (60.3% and 65.2% in groups 1A and 1B, respectively; 61.9% and 55.0% in groups 2A and 2B, respectively). Perprotocol eradication rates did not differ significantly (66.1% and 68.3% in groups 1A and 1B, respectively); however, the rates were significantly different in group 2A (66.7%) versus group 2B (55.5%) (P = 0.03).

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The alkylating agent cyclophosphamide (CP) is a prodrug requiring cytochrome P-450-mediated bioactivation to form the active 4-hydroxycyclophosphamide (4OHCP). Modifications in the rate of CP bioactivation may have implications for the effectiveness of CP therapy, especially in high-dose regimens. In this study, agents frequently co-administered with CP in high-dose chemotherapy regimens were tested for their possible inhibition of the bioactivation of CP in human liver microsomes. The Km and Vmax values for the conversion of CP to 4OHCP were 93 microM and 4.3 nmol/h.mg, respectively. No inhibition was observed for aciclovir, carboplatin, ciprofloxacine, granisetron, mesna, metoclopramide, ranitidine, roxitromycin and temazepam. Inhibition was observed for amphotericin B, dexamethasone, fluconazole, itraconazole, lorazepam, ondansetron and thiotepa, with IC50 values of 50, >100, >50, 5, 15, >100 and 1.25 microM, respectively. For all but thiotepa, these IC50 values were higher than the therapeutic drug levels and thus considered of no clinical relevance. We conclude that of the tested co-medicated agents, only thiotepa inhibited metabolism of CP to 4OHCP at clinically relevant concentrations, and may thereby influence therapeutic and toxic responses of CP therapy.

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After ethical approval, 90 patients scheduled for elective caesarean delivery were randomly allocated receive either ketorolac 15 mg i.v. bolus 20 min before induction, followed by an infusion of 7.5 mg/h (n=45), or saline placebo (n=45). Anaesthesia was maintained with 50% nitrous oxide in oxygen with 0.5% isoflurane. Haemodynamic variables, plasma cortisol concentrations, uterine relaxation, need for supplementary doses of oxytocin, peri-operative blood loss, haematocrit, Apgar scores at 1 and 5 min, postoperative pain scores at rest and movement, and tramadol consumption were recorded.

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In this experimental study both biological treatability of pharmaceuticals and their potential toxic effect in biological processes were evaluated. The pharmaceuticals were selected among those that are present at higher concentration in the Italian wastewater treatment plant effluents and widely used as antiulcer (ranitidine), beta-blocker (atenolol) and antibiotic (lincomycin). The present paper is the continuation of a work already presented,[1] which used a synthetic wastewater fed to laboratory scale SBR (Sequencing Batch Reactor) operated with different sludge ages (8 and 14 days), different biochemical conditions (aerobic or anoxic-aerobic mode) and several influent drug concentrations (2, 3 and 5 mg/L). In this case a real municipal wastewater was used as influent to the SBR. In parallel, batch tests were conducted to determine the removal kinetics of drugs and nitrogen. Toxicity tests using a titrimetric biosensor to verify possible inhibition on microorganisms were also performed. Finally, the possible adsorption of the pharmaceuticals on activated sludge was evaluated. The drugs under investigation showed different behaviours in terms of both biodegradability and toxicity effect on nitrifiers. Ranitidine showed generally low removal efficiencies (17-26%) and a chronic inhibition on nitrification. Atenolol showed generally higher removal efficiencies than ranitidine, even if the fairly good efficiency obtained in the previous experimentation with synthetic wastewater (up to 90%) was not attained with real wastewater (36%). No inhibition on nitrification was observed on both acclimated and non acclimated microorganisms with a high nitrification activity, whilst it was present with activated sludge characterised by a lower nitrification activity. Consistently with his pharmaceutical properties, lincomycin showed significant inhibition on nitrification activity.

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After randomisation 430 patients with reflux oesophagitis (grade 2 or 3) were assigned to receive omeprazole 20 mg or ranitidine 150 b.i.d. for 8 weeks. Patients were given diary cards to assess their symptoms every day, and record every two weeks a life satisfaction index. Patients were seen after 4 and 8 weeks for symptoms assessment and repeat endoscopy at 8 weeks. The perspective of the analysis was that of the payer. The costs of medical care were based in French drug costs currently advertised, payment for physician and actual mean payment for upper GI endoscopy.

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Twenty-three patients with endoscopically proved recurrences after a primary operation for peptic ulcer disease performed in the course of a 7-year period are reviewed. The time elapsed between the operation and the recurrence ranged from 1 year to 17 years. The patients were mainly males. During the period studied 451 primary operations for peptic ulcer disease were performed in the same department. In 12 out of 23 recurrences the primary operation was also performed in the department of the author. In cases of small duodenal or stomal ulcer with two or more previous laparotomies transthoracic truncal vagotomy is preferred to any kind of abdominal intervention. A useful combination of duodenal exclusion, truncal vagotomy and a reflux-preventing type of GEA for recurrences after B 1 type partial gastrectomies was developed. In cases of late recurrences with mild symptoms the patients have to be first treated with H2-receptor blockers (cimetidine, ranitidine, etc.). The cases resistant to medical management have to be considered for surgery. Their results after a secondary surgical intervention proved to be fairly good, probably due to methods adequately selected for the given patient and to reflux-preventing GEA used in some cases. The consideration of an optimal individual solution for each patient is emphasized.

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Ranitidine produces a blood concentration curve with a pronounced secondary peak when administered orally and parenterally. A pharmacokinetic model is proposed to describe this reabsorption phenomenon. The choice of a discontinuous cyclic transfer was justified on the basis of physiological considerations and the good agreement with data from oral and intravenous administration. It is proposed that ranitidine accumulates mainly from the systemic circulation into a depot from which drug and bioreversible drug are spontaneously released in response to food intake. The evaluation of the extent of the first-pass effect and the evaluation of bioequivalency are complicated by the model-independent AUC approach because the area under the concentration versus time curve (AUC) is dependent on the extent of recycling and thus does not properly reflect the extent of primary absorption. By using intravenous administration as a reference dosage form and the integrated form of the regression equations to calculate the AUC values, the bioavailability of the oral dose was found to be 0.56, which corresponds well with the value of 0.58 obtained by linear-log-linear integration. The least-squares parameter estimate of the primary absorption is 0.43.

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This study is undertaken to evaluate the efficacy and safety of rioprostil, 300 micrograms, compared with ranitidine, 150 mg, when given twice daily for 4-6 weeks to patients with active, uncomplicated duodenal ulcer. The effects of each drug on ulcer healing are evaluated by endoscopy. Of a total of 355 patients who have entered this study, 319 are statistically evaluated for efficacy; 162 receive rioprostil and 157 receive ranitidine. After 4 weeks of treatment, 63% of the patients receiving rioprostil are endoscopically healed, compared with 72% of those receiving ranitidine. After 6 weeks of treatment, the cumulative healing rates are 86% and 93.5% respectively; this difference is statistically significant. Diarrhoea is the main adverse event, but is generally mild and self-limiting. These results indicate that rioprostil, 300 micrograms b.d., is a safe and effective treatment for duodenal ulcer, but is slightly less effective than ranitidine, 150 mg b.d.

zantac dosage

Based on these studies, a total of 1540 patients were evaluated for histamine H2-receptor antagonists (verum n = 786, placebo n = 754) and 1235 patients for gastroprokinetics (verum n = 616, placebo n = 619). The probability for treatment success compared to placebo was 0.2026 (0.1261; 0.2791) for histamine H2-receptor antagonists and 0.4029 (0.3042; 0.5069) for gastroprokinetics.

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One hundred and twenty-seven patients with gastric or duodenal ulcer were included in this study. Patients were divided into three groups on the basis of antral H. pylori status and therapeutic modalities. The first group, 58 patients infected by H. pylori, was treated with metronidazole and tripotassium dicitrato bismuthate combined with ranitidine and mylanta. The second group, 40 patients also infected by H. Pylori, was treated with ranitidine and mylanta. The third group, 29 patients, free of H. pylori infection, was designed to evaluate the influence of H2-receptor antagonist on the change of gastrin. When ulcers were completely healed, changes of gastrin concentrations and H. pylori status were re-examined.

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The drug experiences of 1200 patients receiving i.v. histamine H2-receptor antagonists were studied. Forty hospitals in five southeastern states participated in a drug-use evaluation (DUE). In addition to supplying background information, a pharmacist at each hospital used a standardized form to perform a concurrent review of 30 consecutive adult patients who had been started on i.v. cimetidine, ranitidine, or famotidine. In addition to the patient's age and the prescriber's medical specialty, specific DUE criteria included the reason given in the medical record for use; dosage regimen and adjustments made on the basis of the patient's renal function; other GI drugs taken concurrently; pharmacist intervention; simultaneous use of oral medications; occurrence of adverse events; H2-antagonist use with specified drug products known to affect serum drug concentrations of one or both medications; and use of gastric pH monitoring. Therapy with i.v. H2 antagonists was usually started by internal medicine specialists or surgeons, and most of the evaluated patients received such therapy for prevention of stress-related mucosal damage. According to estimated creatinine clearance, 34% of patients were in need of dosage adjustments, but such adjustments were made in only 49% of these. Forty percent of patients began therapy while taking at least one medication orally, and almost one fourth of patients were receiving an additional drug for the treatment of an acid-peptic or related indication. The occurrence of adverse events was similar for the three H2 antagonists studied. The findings identify several problematic areas in the way H2 antagonists are used in clinical practice.

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Upper respiratory tract infections and acid peptic disease were the common illnesses. Generic prescribing and use of essential drugs were low. Some of the drug combinations being used were irrational. Prescriber education may be helpful in encouraging rational prescribing.

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Ranitidine 150 mg q.d.s. is the currently recommended dosage in the United States for the treatment of erosive oesophagitis. To determine whether a higher dose of ranitidine administered less frequently would also be effective in healing erosive oesophagitis, we compared ranitidine 300 mg b.d. with ranitidine 150 mg q.d.s. in the treatment of erosive oesophagitis.

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The effect of N-[2-[[[5-[(dimethylamino)methyl]-2-furanyl]methyl]thio]ethyl]-N'-methyl-2-nitro-1,1-ethenediamine hydrochloride ranitidine and NaCl-solution in different dosages on gastric mucosal potential difference during endoscopy was examined in 92 volunteers. After bolus injections of 10-40 mg ranitidine there was a significant maximum increase in potential difference taken from different parts of the stomach and from the gastric juice. No changes were seen in the duodenal mucosal. Following bolus injections of 2.5 and 5 mg ranitidine there was a lower increase in potential difference in the gastric juice. These dosages seem to be insufficient to induce a maximum increase of potential difference in each individual.

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These results suggest that cimetidine increased dofetilide exposure by inhibiting renal tubular dofetilide secretion, whereas ranitidine did not. This effect is not an H2-receptor antagonist class effect but is specific to cimetidine. If therapy with an H2-receptor antagonist is required, it is recommended that cimetidine at all doses be avoided; since ranitidine has no effect on dofetilide pharmacokinetics or prolongation of the QTc interval, it can be seen as a suitable alternative.

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Angiotensin-converting enzyme (ACE) inhibitor-induced angioedema is a rare, albeit serious emergency that can result in airway compromise and potentially death if not treated promptly. Currently, there are no agents approved by the Food and Drug Administration to target ACE inhibitor angioedema and to prevent intubation. C1 inhibitors are approved for hereditary angioedema but may show promise in alleviating inflammation associated with ACE inhibitor angioedema.

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The response of mouse peritoneal macrophages to Escherichia coli lipopolysaccharide (LPS) resulted in induction of histidine decarboxylase (HDC) and, consequently, of histamine production. Concanavalin A had no effect on the reactions. Alpha-fluoromethylhistidine, a suicide inhibitor of HDC, attenuated, in a dose-dependent manner, both spontaneous and LPS-stimulated IL-1 synthesis by macrophages. IL-1 production was significantly blocked by either an H1 anti-histamine, diphenhydramine, or H2 anti-histamine ranitidine, in the absence of any exogenous histamine. Addition of exogenous histamine accentuated the IL-1 production by macrophages as a function of its dose. These results suggest that IL-1 production by mouse peritoneal macrophages is regulated by histamine synthesized in the system per se and that the effect of histamine is dependent on both H1 and H2 histamine receptors located on the surface of the cells.

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The sensitivity of histamine H2 receptors of the gastric mucosa after one month treatment with ranitidine, administered daily (5 mg/kg i.m.), was checked in 5 conscious cats provided with gastric fistula. Basal acid secretion as well as the acid response to the H2 agonist dimaprit (60 micrograms/kg/hr) were studied before and at different periods after cessation of ranitidine treatment (1, 3, 7 and 14 days). Control experiments were carried out in 5 gastric fistula cats which received daily physiological saline for one month. Basal acid secretion in treated animals increased significantly (p less than 0.05) from 0.04 +/- 0.002 to 0.24 +/- 0.05 mEq H+/10 min. Also the response to dimaprit increased significantly (p less than 0.05) from 0.49 +/- 0.08 to 0.86 +/- 0.12 mEq H+/10 min. Seven days after cessation of treatment, both basal and stimulated secretion returned to pretreatment levels. In control cats no significant difference was noticed in basal and stimulated secretion at the beginning and at the end of the study.

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When antacid medication impairs the gastric digestion, IgE synthesis toward novel dietary proteins is promoted, leading to food allergy.

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These results suggest that clarithromycin plus high-dose ranitidine is a combination which achieves reasonably high H. pylori eradication rates. However, treatment failure inevitably leads to clarithromycin resistance. The improvement of non-ulcer dyspepsia symptoms during acute therapy is independent of H. pylori eradication. Long-term benefit of H. pylori eradication with respect to the symptoms of functional dyspepsia was not observed.

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The effects of thioperamide, an H3 antagonist, and histamine H1 and H2 antagonists (s.c.) on morphine (s.c. or i.c.v.)- and U-50,488H (i.c.v.)-induced antinociception in male ddY mice were examined using the hot-plate (55 degrees C) test. Thioperamide significantly inhibited morphine-induced antinociception, but not U-50,488H-induced antinociception. The suppressive effect of thioperamide on morphine-induced antinociception was reversed by the H1 antagonist pyrilamine, but not by the H2 antagonist zolantidine. On the other hand, pyrilamine significantly potentiated the antinociception induced by morphine, but not that induced by U-50,488H. Zolantidine significantly inhibited morphine-induced antinociception in a dose-dependent manner, but not U-50,488H-induced antinociception. Both astemizole, an H1 antagonist, and ranitidine, an H2 antagonist, which are known to barely cross the blood brain barrier, did not affect morphine-induced antinociception. These results suggest that morphine-induced antinociception may be potentiated by activation of H2 receptors and suppressed by activation of H1 receptors in the brain. Furthermore, neuronal histamine release induced by thioperamide may suppress morphine-induced antinociception through H1 receptors.

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cold medicine zantac 2017-04-18

The central histaminergic nervous system, originating from the tuberomammillary nucleus of the hypothalamus, widely innervates almost the whole brain as well as the spinal cord. However, the effect of histamine on spinal motoneurons, the final common path for motor control, is still unknown. By using 8-14-day-old rat spinal slice preparations and intracellular recordings, the effect of histamine on motoneurons in lumbar spinal cord and the underlying mechanisms were studied. Bath application of histamine (30-300 μM) induced a membrane depolarization in the majority of recorded spinal motoneurons (78/90, 86%). Perfusing slices with tetrodotoxin or low-Ca(2+) /high-Mg(2+) medium did not block the histamine-induced excitation, indicating a direct postsynaptic action of histamine on motoneurons. Separate application of the selective histamine H(1) receptor antagonist mepyramine or the selective histamine H(2) receptor antagonist ranitidine partially suppressed the histamine-induced excitation, whereas a combination of ranitidine and mepyramine totally blocked the excitatory effect of histamine on motoneurons. On the other hand, both the selective histamine H(1) receptor agonist 2-pyridylethylamine and the selective histamine H(2) receptor agonist dimaprit mimicked the buy zantac online excitation of histamine on spinal motoneurons. These agonist-induced excitations were also blocked by mepyramine or ranitidine. Furthermore, histamine affected membrane input resistance and potentiated repetitive firing behavior of spinal motoneurons. These results demonstrate that histamine excites rat spinal motoneurons via the histamine H(1) and H(2) receptors and increases their excitability, suggesting that the hypothalamospinal histaminergic fibers may directly modulate final motor outputs and actively regulate ongoing motor execution andspinal motor reflexes.

zantac 30 mg 2015-07-26

In each period (separated by a > or = 7 d washout), subjects received a single 400-mg oral dose of eprosartan alone, or a single oral dose of eprosartan 400 mg and ranitidine 150 mg on day 4 after 3 days of ranitidine 150 mg twice daily. Serial pharmacokinetic samples buy zantac online were obtained for up to 24 hours following eprosartan dosing.

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By using brain slice preparations and extracellular buy zantac online recordings, the effect of histamine on spontaneous firing activities of neurons in the inferior vestibular nucleus (IVN), a key structure responsible for integration of vestibular, multisensory, and cerebellar inputs, in rats was investigated. Perfusing slices with histamine (1-10μM) elicited an excitatory response on IVN neurons. The responses were not blocked by low Ca(2+)/high Mg(2+) medium, indicating a direct postsynaptic effect of the amine. Furthermore, the histamine-induced excitation was partially blocked by selective histamine H1 receptor antagonist mepyramine (1μM) and H2 receptor antagonist ranitidine (1μM), respectively. Co-application of mepyramine and ranitidine nearly totally antagonized the histamine-induced excitation. Additionally, both selective H1 receptor agonist 2-pyridylethylamine (30-300μM) and H2 receptor agonist dimaprit (10-100μM) effectively mimicked the excitatory action of histamine on IVN neurons. Moreover, selective H4 antagonist JNJ7777120 (10μM) and agonist VUF8430 (30-300μM) had no effect on IVN neurons. These results demonstrate that histamine excites IVN neurons via postsynaptic H1 and H2 rather than H4 receptors, and suggest that the central histaminergic system actively modulate all four major vestibular nuclei including the IVN and may subsequently influence the vestibular nuclei-related reflexes and functions.

toddler zantac dosage 2016-07-14

The relation between use of histamine-2-receptor (H2-receptor) antagonists and gastric cancer risk was investigated in a case-control study in northern Italy. 563 patients with buy zantac online newly diagnosed, histologically confirmed gastric cancer were compared with 1501 controls who did not have neoplastic or gastrointestinal disorders. 36 (6.3%) cases and 59 (3.3%) controls had used H2-receptor antagonists (cimetidine or ranitidine). The relative risk (RR) for ever-use was 1.8 (95% confidence intervals [CI] 1.2, 2.7). The increased risk was restricted to patients who had started treatment with H2-receptor antagonists within 5 years of the diagnosis of stomach cancer (RR 3.1; 95% CI 1.8, 5.3). For first use of H2-receptor antagonists 5-9 years previously the RR was 1.5 (95% CI 0.7, 3.3), and for first use 10 or more years previously RR was 0.2 (95% CI 0.03, 0.8). Although the incidence of gastric cancer was raised for the first few years after the start of treatment with H2-receptor antagonists, this may reflect misdiagnosis of some early gastric cancers. The findings are against long-term persistence of an excess risk of gastric cancer in association with use of H2-receptor antagonists.

zantac 150 generic 2017-08-29

Macrophages purified (> 95%) from lung parenchyma by Percoll density gradients and adherence to polystyrene dishes were incubated (37 degrees C, 2-24 h) with histamine ( buy zantac online 10(-9)-10(-6) M). At the end of incubation, the release of beta-glucuronidase and IL-6 was determined.

zantac dosage pediatric 2017-09-15

a) buy zantac online Enteral administration of ranitidine every 12 hrs leads to effective absorption of the drug from the upper gastrointestinal tract of ICU patients. b) Serum concentrations of ranitidine for both 150-mg and 300-mg enteral doses remained within, or exceeded, the therapeutic range in > 90% of ICU patients with clinically important criteria of stress.

zantac 48 tablets 2015-05-12

Grade I oesophagitis is usually considered to be a less severe form of gastro-oesophageal reflux disease (GORD). However, with regard to symptom severity, patients without macroscopic mucosal lesions have been shown not to differ from those with more severe oesophagitis. A number of controlled trials on the efficacy of omeprazole in GORD have included patients with lower grades of the disease. The results show that the differences in efficacy between omeprazole and H2-receptor antagonists, which have been established for the treatment of erosive and ulcerative oesophagitis, also extend to patients with grade I oesophagitis (erythema and friability). In these studies, omeprazole provided more rapid symptom resolution and histological improvement than ranitidine. In one double-blind comparative trial, complete endoscopic normalization of the oesophageal mucosa was observed in 90% of patients with grade I oesophagitis within 4 weeks of treatment with omeprazole, 40 mg once daily, compared with 55% of those treated with ranitidine, 150 mg twice daily; at 8 weeks the mucosa in all patients in the omeprazole group had completely healed at endoscopy, while oesophagitis was still present in 21% of the patients receiving ranitidine. A separate 6-month, placebo-controlled maintenance study was performed in patients who had completed a short-term study and who had total relief from the major symptoms of GORD and complete healing of endoscopic oesophagitis. All patients given placebo had an endoscopic recurrence (i.e. endoscopic grade I or more) and this was associated with the return of symptoms in 75% of cases buy zantac online .(ABSTRACT TRUNCATED AT 250 WORDS)

zantac tabs 2015-06-05

We have identified and characterized non-adrenergic [3H]clonidine binding sites in rat stomach. The binding of [3H]clonidine was rapid, reversible, partly specific (as defined by cirazoline 0.1 nmol/l), saturable and of high affinity. The specific binding of [3H]clonidine to rat stomach membranes was concentration-dependently inhibited by various imidazolines and guanidines including the sigma site ligand 1,2-di-(2-tolyl)guanidine (DTG), by the butyrophenone derivative (+)-3-PPP[(R)-3-(3-hydroxyphenyl)-N-propylpiperidine]; the latter two compounds are also known to exhibit affinity for sigma sites. In contrast, rauwolscine, histamine, ranitidine and the non-hydrolysable GTP-analogue Gpp(NH)p (5' guanylylimidodiphosphate) did not, or with negligible affinity, inhibit [3H]clonidine binding. In most cases, the competition curves were best fitted to a two-site model. The rank order of affinity for the high affinity site (in a few cases for a single detectable site) was as follows: cirazoline > idazoxan > or = DTG > (+)-3-PPP > chlonidine > guanabenz > haloperidol. This rank order is not compatible with the pharmacological properties of either I1- or I2-imidazoline binding sites. However, the ability of haloperidol, (+)-3-PPP and DTG to displace [3H]clonidine (the latter two with high affinity) suggests that the [3H] clonidine binding sites in rat buy zantac online stomach may be related to sigma-like sites.

zantac dosage infants 2016-01-23

Literature and buy zantac online experimental data relevant to the decision to allow a waiver of in vivo bioequivalence testing for the approval of immediate release (IR) solid oral dosage forms containing ranitidine hydrochloride are reviewed. According to the current Biopharmaceutics Classification System (BCS), ranitidine hydrochloride should be assigned to Class III. However, based on its therapeutic and therapeutic index, pharmacokinetic properties and data related to the possibility of excipient interactions, a biowaiver can be recommended for IR solid oral dosage forms that are rapidly dissolving and contain only those excipients as reported in this study.

zantac renal dosing 2017-01-24

The possibility of a pharmacokinetic interaction between H2-receptor antagonists and alcohol consumed at lunchtime, was investigated in 24 healthy non-alcoholic male subjects, each receiving ranitidine 150 mg four times daily, cimetidine 400 mg four times daily, famotidine 20 mg four times daily and placebo in an open, four-way cross-over study. The subjects consumed 50 g alcohol after buy zantac online a standard lunch on the eighth day of dosing with study medication. Blood samples taken during the 6 h after alcohol consumption were analysed for alcohol concentrations by gas liquid chromatography using head space analysis. None of the H2-receptor antagonists had any statistically significant effects on any of the pharmacokinetic parameters for alcohol. Mean Cmax (95% CI) results for ranitidine were 547 (516, 580), cimetidine 531 (501, 563), famotidine 563 (530, 598) and placebo 529 (499, 561) mg l-1.

zantac 500 mg 2016-02-13

274 patients completed the protocols. The overall 'intention to treat' and buy zantac online 'per protocol' H. pylori eradication rates in all subjects were 57.6% (95% CI: 52-63) and 63.1% (95% CI: 57-68), respectively. The eradication rates achieved in the groups (RBC-AT, RBC-AC and RBC-MT) were 64.4% (95% CI: 54-74), 66.2% (95% CI: 56-76), and 58.9% (95% CI: 49-68) on 'per protocol' analyses, respectively. There was no difference in eradication rates, compliance and major side effects between the groups.

zantac gerd dosage 2017-01-13

The capsule released the ranitidine solution when activated in the jejunum, ileum and colon (visualized by the gamma camera). There was no difference in the extent of ranitidine absorption or buy zantac online ranitidine pharmacokinetics when the capsule was activated in the jejunum or ileum.

zantac dosage instructions 2017-07-09

First-line chemotherapy with paclitaxel and carboplatin in metastatic SCLC achieved a response rate and survival similar to standard regimens. With buy zantac online 1-day administration and a tolerable toxicity profile, this combination merits further investigation.

toddler zantac dose 2017-03-30

The charts of 54 children diagnosed with antral H. pylori were reviewed, to establish the incidence of gastroduodenal inflammation and compare therapeutic efficacies of antisecretory vs. antibacterial therapy. Histology demonstrated normal mucosa in three cases (6%) and gastric/duodenal buy zantac online inflammation (> or = Whitehead grade 3) in 51 biopsies (94%). 23/43 children (53%) initially responded to H2-blockers; however, by 10 mo, 13 had relapsed clinically. All of these patients subsequently responded to amoxicillin plus bismuth subsalicylate. Of the 20 children who failed to enter remission after an initial course of H2-blockers, all became symptom-free after treatment with amoxicillin/bismuth. Compared to antisecretory agents, antibacterial treatment induced clinical remission in 11/11 patients (p < 0.001), who remained symptom-free for 10 +/- 0.2 mo. Clinical remissions were maintained in significantly more patients following amoxicillin/bismuth vs. H2-blockers (44/54 vs. 10/43 courses, p < 0.001); and, the cumulative probability of remaining asymptomatic was significantly greater in the antibiotic group (p < 0.001). These data suggest that gastric colonization by H. pylori is highly predictive of mucosal pathology in children. Initial therapy should be directed toward achieving bacterial eradication, as opposed to gastric acid suppression.

zantac 150 mg 2015-06-03

In the last few years, several drugs have been proposed for the healing of peptic ulcers H2 receptor antagonists are probably the reference-drugs for their efficacy and safety. Acute treatment of Accutane Buy Online peptic ulcer with cimetidine, ranitidine or famotidine gives a high healing rate: from 60% to 90%, depending on the location of the ulcer and the drug used. However, relapse after short-term treatment still remains frequent, and prophylaxis of recurrence must be decided. Long-term treatment with antisecretory drugs could be dangerous for changes of the gastric system, with nitrites and nitro-compounds occurrence, and for the risk of frequent relapses. Therefore, the role of mucus-barrier drugs and surgery must be reconsidered.

zantac dosing 2016-08-14

Cimetidine and ranitidine, but not the other H2RAs, can cause small elevations of serum alcohol level when alcohol and drug are administered concurrently. Studies with larger numbers of participants were less likely to demonstrate this effect. Relative to accepted, legal definitions Atarax 30 Mg of intoxication, the effect of any H2RA on blood alcohol level is unlikely to be clinically relevant.

zantac dosage pediatrics 2017-09-23

The acid secretion mechanism can be studied by measuring a series of metabolic markers and neurotransmitters from in vitro isolated tissue. A microelectrode array was used to monitor proton concentration and histamine levels from isolated guinea pig stomach tissue. The device was partially modified using iridium oxide to form a series of pH sensors, whereas unmodified gold microelectrodes were used to measure the level of histamine in the gut. Real-time measurements in the presence of the H2-receptor antagonist ranitidine produced significant decreases in the overall Delta pH response, as expected. Also, a significant variation in the Delta pH Cozaar Medication Picture response in between pH sensors was observed in the presence of pharmacological treatment due to structural features of the tissue. No significant differences in Delta i(H) were detected in the presence of ranitidine as expected. More significantly, clear variations in Delta pH responses between animals in control conditions and those in the presence of ranitidine was observed highlighting possible variation in parietal cell density and/or variations in tissue activity. These results identify great possibilities in applying these multi-sensing devices as a long-term stable personalised diagnostic tool for pharmacological screening and disease status.

zantac 6 tablets 2015-05-27

Hypergastrinaemia induced by potent inhibitors of acid secretion is thought to occur as a result of the elimination of the inhibitory effects of intragastric acid on gastrin release. The present study was designed to determine if the mechanisms responsible for feedback inhibition of gastrin release and acid secretion by intragastric acid are preserved during four weeks of varying degrees of drug-induced acid inhibition. Forty-eight healthy male volunteers were randomly assigned to one of four treatments for four weeks: 10 mg omeprazole o.m., 20 mg omeprazole o.m., 40 mg omeprazole o.m. or 150 mg ranitidine b.d. Gastrin release and acid secretion in response to peptone meals maintained at pH 2.5 and pH 5.5 by intragastric titration, and 24-hour gastrin profiles in response to standard meals were determined before treatment, at the fourth week of treatment and two weeks after discontinuing treatment. As expected, omeprazole produced dose-related effects on acid secretion and gastrin concentrations that were largely reversed after treatment was discontinued. Gastrin release in response to pH 5.5 peptone meals remained significantly greater than gastrin release in response to pH 2.5 meals during treatment with all doses of omeprazole. The ratio of pH 5.5/pH 2.5 peptone meal-stimulated gastrin release was approximately 1.5, and remained constant for all treatment groups throughout the study period. These data indicate that four weeks of drug induced hypochlorhydria causes an apparent increase in overall G-cell function, but 3 Mg Lasix it does not interfere with normal feedback inhibition of gastrin release and acid secretion mediated by intragastric acidity.

zantac generic price 2015-04-18

Omeprazole reduced reflux to 0.1%, ranitidine to 9.4% per 24 hours. Symptoms were ameliorated in both groups. There was a small, but statistically significant regression of Barrett's oesophagus in the omeprazole group, both in length and in Medicine Zocor area. No change was observed in the ranitidine group. The difference between the regression in the omeprazole and ranitidine group was statistically significant for the area of Barrett's oesophagus (p=0. 02), and showed a trend in the same direction for the length of Barrett's oesophagus (p=0.06).

zantac chewable tablets 2015-08-16

The results suggest that endogenous hypergastrinemia induced by these acid-suppressing drugs has no stimulatory effect on colon Cymbalta Mg mucosal growth or progression or biological behavior of experimental rat colon cancer.

zantac drug 2016-08-08

Upper gastrointestinal bleeding is a lethal complication after open heart Neurontin User Reviews surgery. We designed a prospective randomized trial to test the efficacy of different antisecretory agents to prevent upper gastrointestinal disease after operation.

zantac pill 2015-06-13

A rational approach to the design of centrally acting agents is presented, based initially upon a comparison of the physicochemical properties of three typical histamine H2 receptor antagonists which do not readily cross the blood-brain barrier with those of the three brain-penetrating drugs clonidine (6), mepyramine (7) and imipramine (8). A good correlation was found between the logarithms of the equilibrium brain/blood concentration ratios in the rat and the partition parameter, delta log P, defined as log P (1-octanol/water)-log P (cyclohexane/water), which suggests that brain penetration might be improved by reducing overall hydrogen-bonding ability. This model has been employed as a guide in the design of novel brain-penetrating H2 antagonists by the systematic structural modification of representatives of different structural types of H2 antagonists. Although marked increases in brain penetration amongst congeners of cimetidine (1), ranitidine (9), and tiotidine (10) were achieved, no compound was found with an acceptable combination of H2 antagonist activity (-log KB in the guinea pig atrium greater than 7.0) and brain penetration (steady-state brain/blood concentration ratio greater than 1.0). Conversely, structural modification of N-[[(piperidinyl-methyl)phenoxy]propy]acetamide (30) led to several potent, novel compounds which readily cross the blood-brain barrier. One of these, zolantidine (SK&F Lamictal Generic Cost 95282, 41), whose -log KB is 7.46 and steady-state brain/blood ratio is 1.4, has been identified for use in studying histaminergic H2 receptor mechanisms in brain. Comparison of delta log P values with the logarithms of the brain/blood ratios for 20 structurally diverse compounds for which data became available confirms a highly significant correlation and supports the general validity of this model.

zantac generic 2017-10-22

Four hundred and twenty-seven patients were randomised. At two weeks there was no significant difference between placebo and ranitidine, regarding the proportion of patients with complete relief from symptoms or satisfied with treatment. Ranitidine was superior to placebo in improving symptoms at two weeks. Ranitidine, 150 mg q.i.d. offered no additional advantage in weeks three to four over prolonging treatment with 150 mg b.i.d. after the first two weeks. Patients with oesophagitis at inclusion relapsed more than those with symptoms only, 67% compared with 52%, (p = 0.013).

zantac cost 2015-05-06

Infliximab (IFX) is an anti-tumor necrosis factor-alpha antibody used to treat inflammatory joint diseases. Infusion reactions (IR) can occur during and after intravenous administration and often require discontinuation of IFX therapy. This retrospective study aimed at evaluating the incidence of IR in patients with joint inflammatory diseases receiving IFX with and without premedication. Clinical charts of rheumatoid arthritis, psoriatic arthritis, and ankylosing spondylitis patients receiving IFX from January 2002 to December 2014 were reviewed. Patients receiving only one premedication protocol over time were enrolled and clustered based on the type of premedication as follows: group 1 received no premedication; group 2 received paracetamol, esomeprazole, hydrocortisone, and chlorpheniramine maleate; group 3 received paracetamol, hydoxyzine, ranitidine, and 6-methylprednisolone. Adverse events were recorded during the infusion, in the following hours and at control visits. The charts of 105 patients treated with IFX were selected. IR were observed in 23/51 patients of group 1, in 7/35 patients of group 2, and none of 19 patients in group 3. IR incidence was significantly lower in the second (p = 0.021) and third (p < 0.001) compared to the first group. The incidence of IR was significantly lower in group 3 than group 2 (p < 0.043). Moreover, patients in group 1 had a relative risk of developing an IR 2.5 times higher than group 2. In our experience, the use of premedication significantly reduced the number of IR to IFX. In particular, the combination of paracetamol, hydroxyzine, 6-methylprednisolone and ranitidine was more efficacious than paracetamol, esomeprazole, hydrocortisone, and chlorpheniramine maleate combination protocol.