The half-life of the ketorolac tromethamine S-enantiomer was approximately 2.5 hours (SD Â± 0.4) compared with 5 hours (SD Â± 1.7) for the R-enantiomer. In other studies, the half-life for the racemate has been reported to lie within the range of 5 to 6 hours.
Proton pump inhibitors (PPIs) are a group of drugs whose main action is a pronounced and long-lasting reduction of gastric acid production. Within the class of medications, there is no clear evidence that one agent works better than another. They are the most potent inhibitors of acid secretion available.
Proton pump inhibitors. A drug may be classified by the chemical type of the active ingredient or by the way it is used to treat a particular condition. Each drug can be classified into one or more drug classes. Proton pump inhibitors act by irreversible inhibition of the H+/K+ ATPase, in the parietal cells of the stomach. It markedly inhibits gastric acid secretion and has a long duration of action.