Definition
Phenergan is a brand name for the drug promethazine. It's used to treat allergies, motion sickness, and nausea. It works by blocking histamine, reducing allergic symptoms. Phenergan can also cause drowsiness, acting as a sedative. Itβs like the name brand version of a common medication. Unlike some milder allergy treatments, Phenergan is known for its stronger effects. It's similar to other antihistamines, but often prescribed when a more potent effect is needed.