What is a generic drug?

When a drug patent expires other companies may produce a generic version of the brand name drug. A generic medication, also approved by the FDA, is basically a copy of the brand name drug and is marketed under its chemical name. A generic drug may have a different color or shape than its brand name counterpart, but it must have the same active ingredients, strength, and dosage form (i.e., pill, liquid, or injection), and provide the same effectiveness and safety as its brand name counterpart.