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Famotidine, sold under the brand name Pepcid among others, is a histamine H 2 receptor antagonist medication that decreases stomach acid production. [4] It is used to treat peptic ulcer disease, gastroesophageal reflux disease, and Zollinger-Ellison syndrome. [4] It is taken by mouth or by injection into a vein. [4] It begins working within an ...
The H 2 receptor antagonists are a class of drugs used to block the action of histamine on parietal cells in the stomach, decreasing the production of acid by these cells. H 2 antagonists are used in the treatment of dyspepsia, although they have been surpassed in popularity by the more effective [1] proton pump inhibitors.
Histamine receptors are proteins that bind with histamine, a neurotransmitter involved in various physiological processes. There are four main types: H1, H2, H3, and H4. H1 receptors are linked to allergic responses, H2 to gastric acid regulation, H3 to neurotransmitter release modulation, and H4 to immune system function.
In 1972, functional antagonists to the H2 receptor emerged. This class of agents has since revolutionized the treatment of PUD, and its priority in the treatment of acid-related diseases has only been surpassed by the development of PPIs. Cimetidine, ranitidine, famotidine, and nizatidine are the four most commonly used H2-receptor antagonists ...
Ibuprofen/famotidine, sold under the brand name Duexis, is a fixed-dose combination medication used for the treatment of rheumatoid arthritis and osteoarthritis. [1] It contains ibuprofen, a nonsteroidal anti-inflammatory drug (NSAID) and famotidine, a histamine H2-receptor antagonist. [1] Ibuprofen/famotidine is available as a generic ...
A histamine agonist is a drug which causes increased activity at one or more of the four histamine receptor subtypes. H 1 agonists promote wakefulness. [1] H 2: Betazole and Impromidine are examples of agonists used in diagnostics to increase histamine. H 3: Betahistine is a weak Histamine 1 agonist and a very strong antagonist of the Histamine ...
Histamine is a ubiquitous messenger molecule released from mast cells, enterochromaffin-like cells, and neurons. [5] Its various actions are mediated by histamine receptors H 1, H 2, H 3 and H 4. The histamine receptor H 2 belongs to the rhodopsin-like family of G protein-coupled receptors.
Ball-and-stick model of cimetidine, the prototypical H 2 receptor antagonist. H 2 antagonists, sometimes referred to as H2RAs [1] and also called H 2 blockers, are a class of medications that block the action of histamine at the histamine H 2 receptors of the parietal cells in the stomach. This decreases the production of stomach acid.
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