But who are you to tell other people which drugs they should have a legitimate right to contain in their bodies?
The words "legitimate" and "legal" share the same root. That's the point. Someone without an FDA-approved use for these medications does NOT have a legitimate right to take them. Just because we want to doesn't mean we have the right to (although on a case-by-case basis this can be debated, and rights often change. This is what our legislative system is for.)
Let me guess: you're in favor of legalizing marijuana?
Adding manpower to a late software project makes it later. -- F. Brooks, "The Mythical Man-Month"