Nah, nothing wrong with the question.
generally speaking: there are many medicines that could be used as intermediates for a synthesis of drugs. Those that are easy to use are typically regulated.
Sometimes it has a side effect of medicines that become unavailable, which is a problem for those using them to treat some condition. Several years ago someone wrote a tongue-in-a-cheek paper testing whether it is possible to go the other way - produce an active component of a medicine from a drug available on the black market.
It actually worked.