Well, in states in which there is no medical marijuana, illegally self-medicating is often better than relying on a doctor's prescription (look at chemo-induced nausea). Also, sometimes, it's useful to get fucked up. Sometimes it's better to get drunk and forget your troubles than it is to harp on them, or to do a couple of lines of blow with some buddies to take a boring night and turn it into a party. Just about any drug can be used recreationally. Crack is the only drug I've come across that I would consider to be truly beyond the pale in just about every circumstance, and most crackheads wouldn't smoke that shit if powder cocaine were cheap, safe, and available to them.Under which circumstances is self-medication preferable to legitimate, professional medication?