Are Generic Versions as Good as Brand-Name Zyban?
All generic medications must have certain tests to compare them to brand-name medications. The U.S. Food and Drug Administration (FDA) then looks at these tests to decide if the generic versions are equivalent to the brand-name medications and assigns a rating to each one. An “AB” rating means that the FDA has determined that a generic medication is equivalent to a brand-name medication. All of the generic Zyban versions currently available have an “AB” rating, meaning that they should be equivalent to brand-name Zyban. However, generic Wellbutrin SR® (which is also sold under the name Bupropion SR) is technically not equivalent to Zyban, due to differences in the prescribing information — though healthcare professionals usually use them interchangeably.
