Definition: An active ingredient is the component of a medication responsible for the medication’s effect.
Also Known As: therapeutically active ingredient, pharmaceutically active ingredient
The active ingredient in Zoloft
, a prescription medication used to treat depression
, is sertraline hydrochloride
. The active ingredient in Prilosec
, an over-the-counter medication used to treat GERD
(heartburn), is omeprazole magnesium. The active ingredient in BJ's Allergy Medicine
, an over-the-counter medication used to treat nasal allergies
, is diphenhydramine HCL, which is also sold under the brand name Benadryl.