I wonder about other amphetamines. Because there’s some things you can take turn into amphetamines when your body processes them, IIRC. There are also medications that are in the same family. I suspect that while people do usually tell their dentist what medications they’re taking when prompted, some people are kind of flaky and forget, while other people might have a reason in their head not to. But, not everybody thinks to disclose stuff like “supplements” which are unregulated, variably legal, and could also pose a health risk if they qualify for this particular scenario. Good of them to tell people that though. I never knew that and I’ve gotten lots of dental work done, although, I’ve never done hard drugs.