Well, some psychotropics that are more commonly drunk, are usually that way for a reason.

Sometimes, the only way the body can absorb the stuff is through the intestines. (For blood to be attracted to a chemical and be absorbed into the bloodstream via the lungs, the hemoglobin has to be more attracted to the chemical than oxygen and/or carbon dioxide)

Sometimes, you just don't want to put nasty ass shit in to your lungs.

Common sense: If something is more often drunk, and so rarely smoked that it's hard to research on the internet...

Stick to the absinthe.