Under United States law, a drug is any substance (other than a food or device) that is intended for use in the diagnosis,
cure or prevention of disease, or is intended to affect the structure or function of the body.
See also: .
Common drugs used in Allergology
The generic name of a drug is the name of the active ingredient, as distinct from the name given to a
particular product (which contains the drug), by a manufacturer. A doctor may prescribe a medication by product
name or generic name.