I have a CFI student who is currently using BasicMed to satisfy her FAA Medical Requirement. She is taking a drug, which the FAA in AME guidance prohibits, and is wondering if she can continue to take that drug. Going through the regulations, there is no FAR specifically naming drugs, and it appears that for BasicMed, the approval for drug use lies with the examining/issuing physician.
She has gone back to her (issuing) physician and verified that there is no concern with her taking this drug while operating a "vehicle or aircraft" and the physician has confirmed that in the physician's opinion there is no concern. In her case, her primary care physician (PCP) declined to provide a BasicMed exam, but her endocrinologist agreed to. The drug in question is one the endocrinologist is using to treat her with.
So what we have is a situation where the AME's receive guidance to "Do Not Issue" (DNI) and under BasicMed it appears that the issuing physician can decide contrary to FAA Class 1, 2 or 3 policy. The question is: Under BasicMed may a pilot be taking a drug, with the approval of their physician, which would otherwise be prohibited under a Class 1,2 or 3 FAA medical?
Addendum: The following is a AC issued shortly before this question was asked: https://www.faa.gov/documentLibrary/media/Advisory_Circular/AC_68-1A.pdf