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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 ]
Proton-pump inhibitors have largely superseded the H 2-receptor antagonists, a group of medications with similar effects but a different mode of action, and heavy use of antacids. [3] A potassium-competitive acid blocker (PCAB) revaprazan was marketed in Korea as an alternative to a PPI.
Proton-pump inhibitors are named using the suffix "-prazole". There is a purported correlation (but no proven causal link) between the use of PPIs and the risk of dementia. [ 6 ] However, this remain controversial as chronic and co-morbid pathology, and resultant polypharmacy (including increased consumption of PPIs), will probably itself also ...
Ranitidine was introduced in 1981 and was the world's biggest-selling prescription drug by 1988. The H 2 receptor antagonists have since largely been superseded by the even more effective proton pump inhibitors (PPIs), with omeprazole becoming the biggest-selling drug for many years.
A derivative of timoprazole, omeprazole, was discovered in 1979, and was the first of a new class of drug that control acid secretion in the stomach, a proton pump inhibitor (PPI). [11] [12] Addition of 5-methoxy-substitution to the benzimidazole moiety of omeprazole was also made and gave the compound much more stability at neutral pH. [6]
The pharmacologic treatment of acid peptic disorders centers on redressing this imbalance by either improving mucosal defenses with drugs like sucralfate, bismuth, and prostaglandin analogs, neutralizing acid with antacids, or decreasing acid secretion with histamine 2 receptor antagonists or, more recently, proton pump inhibitors. [2]