Dear friends, After treatment of millions of patients suffering from Gastroesophageal Reflux Disease (GERD) and other acid-related ailments with proton pump inhibitors, there are still unmet medical needs such as rapid and reliable pain relief, especially for nocturnal acid breakthrough. Here is the biochemistry and pharmacology of the potassium- competitive acid blocker (P-CAB) Soraprazan, a novel, reversible, and fast-acting inhibitor of gastric H,K-ATPase.Soraprazan shows immediate inhibition of acid secretion in various in vitro models and in vivo and was found to be more than 2000-fold selective for H,K-ATPase over Na,Kand Ca-ATPases. Soraprazan is superior to esomeprazole in terms of onset of action and the extent and duration of pH elevation in vivo in the dog. Rapid and consistent inhibition of acid secretion by Soraprazan renders the P-CABs a promising group of compounds for therapy of GERD. Thanks and regards,
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