Misoprostol is a synthetic prostaglandin E1 (PGE1) analog that is used for the prevention of nonsteroidal anti-inflammatory drug (NSAID) induced gastric ulcers, to treat missed miscarriage, to induce labor, and as an abortifacient. The latter use is controversial in theUnited States. Misoprostol was invented and marketed by G.D. Searle & Company (nowPfizer) under the trade name Cytotec, but other brand-name and generic formulations are now available as well.
Misoprostol is approved for use in the prevention of NSAID induced gastric ulcers. It acts upon gastric parietal cells, inhibiting the secretion of gastric acid via G-protein coupled receptor mediated inhibition of adenylate cyclase, which leads to decreased intracellularcyclic AMP levels and decreased proton pump activity at the apical surface of the parietal cell. Because