It seems Viagra has an off-label use for some heart ailments, including some versions of cardiomyopathy.
I am really surprised Scott wasn't on any high blood pressure medication with the smoking and the drinking.
Buprenorphine can be abused, but the literature seems to say that it is less likely than other prescriptions for opioid dependence.
Really, the question is if it was one doctor prescribing these and if not, if the other doctors knew what he was taking. If not, then I would assume he was using different pharmacies. If so, then his regimen was probably safe.