Cimetidine is a selective H2 antihistaminic that blocks gastric secretion, cardiac stimulation, and bronchial relaxation. The bioavailability of Cimetidine is less because of first pass hepatic metabolism. Cimetidine is also used in the treatment of gastric and duodenal ulcers, erosive gastroesophageal reflux disease (GERD) and gastrointestinal bleeding. Tagamet is highly selective in action. Tagamet has no effect on H1 mediated responses. It blocks all the phases (like basal, psychic, neurogenic and gastric) of gastric secretion. The secretory responses to histamine, acetyl choline, gastrin, insulin, alcohol and food are attenuated. Tagamet amplify the responses to secretagogues. Tagamet reduces the volume of acid, pepsin content and intrinsic factor secretion. Tagamet does not interfere with vitamin B12 absorption. You can easily buy Cimetidine here


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10 to 14 days express shipping – or 3 to 4 weeks for regular shipping. | Medshop4u Online Pharmacy.

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How does Cimetidine / Generic of Tagamet work?

Cimetidine is a selective H2 blocker. Tagamet blocks histamine induced gastric secretion.

Side effects of Cimetidine / Generic of Tagamet

The common side effects reported with Tagamet are diarrhea, headaches, mental confusion, agitation, psychosis, depression, anxiety, hallucinations, disorientation, impotence, agranulocytosis, aplastic anemia, bradycardia, tachycardia, A-V heart block, arthralgia, myalgia and exacerbation of joint symptoms.

Guidelines before using Cimetidine

The co-administration of warfarin and Tagamet can alter the prothrombin time. Cimetidine is not administered in pediatric patients below the age of 16. It is not advisable to consume the Tagamet during pregnancy and lactation. Tagamet should not be given along with Atazanavir, herbal products and azole antifungals due to serious drug interactions.

What are the common dosages of Cimetidine

The recommended dosage of Tagamet in gastric and duodenal ulcers for adults is 800mg once daily at bedtime or 300 mg four times a day with meals. The recommended adult oral dosage for the treatment of erosive esophagitis is 1600 mg daily in divided doses.


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