Prevpac

This page contains recent news articles, when available, and an overview of Prevpac but does not offer medical advice. You should contact your physician with regard to any health issues or concerns.


Overview:

Prevpac
(when available)

Pharmacology and use:
Lansoprazole, an acid proton-pump inhibitor similar to omeprazole, is used as an untiulcer drug in the treatment and maintenance of healing of duodenal or gastric ulcers, erosive and reflux esophagitis, NSAID-induced ulcer, Zollinger-Ellison syndrome, and Barrett's esophagus. Lansoprozole is active against Helicobacter pylori. For treatment of Acid-reflux disorders (GERD); Peptic Ulcer Disease, Duodenal ulcers and esophagitis; Zollinger-Ellison syndrome

Mechanism Of Action:
Lansoprazole belongs to a class of antisecretory compounds, the substituted benzimidazoles, that do not exhibit anticholinergic or histamine H2-receptor antagonist properties, but rather suppress gastric acid secretion by specific inhibition of the (H+,K+)-ATPase enzyme system at the secretory surface of the gastric parietal cell. Because this enzyme system is regarded as the acid (proton) pump within the parietal cell, Lansoprazole has been characterized as a gastric acid-pump inhibitor, in that it blocks the final step of acid production. This effect is dose-related and leads to inhibition of both basal and stimulated gastric acid secretion irrespective of the stimulus.

News Articles on Lansoprazole

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Brand Names/Synonyms:
Prevpac is also known by the following brand names and/or synonymsAG 1749; Agopton; Amarin; Aprazol; Bamalite; Biuret; Biuret Gr; Biuret Reagent; Biuret Reagent Solution; Blason; CHEMBANK1503; Compraz; Dakar; HSDB 7204; Ilsatec; Ketian; Lancid; Lanproton; Lansopep; Lansoprazol [Inn-Spanish]; Lansoprazole; Lansoprazole [Usan:Ban:Inn]; Lansoprazolum [Inn-Latin]; Lanston; Lanz; Lanzol-30; Lanzopral; Lanzor; Lasoprol; Limpidex; Mesactol; Monolitum; Ogast; Ogastro; Opiren; Prevacid; Prevacid Iv; Prevacid Solutab; Prevpac; Prezal; Pro Ulco; Promp; Prosogan; Suprecid; Takepron; Ulpax; Zoprol; Zoton

Drug Category:
Prevpac is categorized under the following by the FDA: Anti-ulcer Agents; Anti-Infectives; Proton-pump Inhibitors; ATC:A02BC03

Dosage Forms:
Enteric coated capsules

Absorption:
The absorption of lansoprazole is rapid, with mean Cmax occurring approximately 1.7 hours after oral dosing, and relatively complete with absolute bioavailability over 80%.

Interactions:
Interactions for Lansoprazole:

Lansoprazole is metabolized through the cytochrome P450 system, specifically through the CYP3A and CYP2C19 isozymes. Studies have shown that lansoprazole does not have clinically significant interactions with other drugs metabolized by the cytochrome P450 system, such as warfarin, antipyrine, indomethacin, ibuprofen, phenytoin, propranolol, prednisone, diazepam, clarithromycin, or terfenadine in healthy subjects. These compounds are metabolized through various cytochrome P450 isozymes including CYP1A2, CYP2C9, CYP2C19, CYP2D6, and CYP3A. When lansoprazole was administered concomitantly with theophylline (CYP1A2, CYP3A), a minor increase (10%) in the clearance of theophylline was seen. Because the small magnitude and the direction of the effect on theophylline clearance, this interaction is unlikely to be clinical concern. Nonetheless, individual patients may require additional titration of their theophylline dosage when lansoprazole is started or stopped to ensure clinically effective blood levels.

Lansoprazole has also been shown to have no clinically significant interaction with amoxicillin.

In a single-dose crossover study examining lansoprazole 30 mg and omeprazole 20 mg each administered alone and concomitantly with sucralfate 1 gram, absorption of the proton pump inhibitors was delayed and their bioavailability was reduced by 17% and 16%, respectively, when administered concomitantly with sucralfate. Therefore, proton pump inhibitors should be taken at least 30 minutes prior to sucralfate. In clinical trials, antacids were administered concomitantly with lansoprazole delayed-release capsules; this did not interfere with its effect.

Lansoprazole causes a profound and long lasting inhibition of gastric acid secretion; therefore, it is theoretically possible that lansoprazole may interfere with the absorption of drugs where gastric pH is an important determinant of bioavailability (e.g. ketoconazole, ampicillin esters, iron salts, digoxin).





Chemical IUPAC Name:
2-[[3-methyl-4-(2,2,2-trifluoroethoxy)pyridin-2-yl]methylsulfinyl]-1H-benzoimidazole

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