Q. Are the non-active ingredients in generic medicines as good as those in brand name drugs?
Everything that goes into a medicine must be approved by the FDA, including the inert ingredients. Sometimes a generic manufacturer must change one or more of these because the brand company has patented the formulation of the specific drug. These changes in no way affect the effectiveness of the drug, since the generic manufacturer must show the FDA that the active ingredient still gets into your body to the same extent and rate as the brand name.
Source: Generic Pharmaceutical Association