Currently there is no Advair generic available. At some point in the future a generic Advair may become available when the patent expires. However, it is not known when this will happen for Advair. Because Advair is a combination asthma medication, each of its components has a different patent life. As a result it is very difficult to predict when generic Advair might become available.
When available, generic Advair will be identical--or bioequivalent--to a brand name Advair in dosage form, safety, strength, route of administration, quality, and performance characteristics. The FDA will mandate that generic Advair have the same high quality, strength, purity and stability as brand-name Advair. In short, it should be the same, but at a much lower cost.
FDA. Accessed April 2, 2011. Generic Drugs: Questions and Answers