Drugs@FDA allows you to search for official information about FDA approved innovator (brand name) and generic drugs and therapeutic biological products.
The main uses of Drugs@FDA are:
finding approved labels for approved drug products
finding generic drug products for an innovator drug product
finding therapeutically equivalent drug products for an innovator or generic drug product
finding patient information for drugs approved from 1998 on
finding all drugs with a specific active ingredient
viewing the approval history, including approval letter(s) and review packages of a drug