1. Proton pump inhibitors like omeprazole, pantoprazole, and esomeprazole work by blocking the gastric H+, K+-ATPase pump, inhibiting gastric acid secretion and providing relief from conditions like acid reflux and ulcers.
2. Domperidone is commonly used to treat nausea and increase prolactin levels. It works by blocking peripheral dopamine receptors without crossing the blood-brain barrier. It is often prescribed for nausea from other drugs or conditions in lactating mothers.
3. Loperamide is an opioid receptor agonist that is used as an antidiarrheal. It works by activating the mu receptors in the gastrointestinal tract to reduce motility and fluid