Pharmacists are well-versed on drug interactions and side effects. Although doctors should provide an exhaustive list of side-effects and special instructions,

Pharmacists are well-versed on drug interactions and side effects. Although doctors should provide an exhaustive list of side-effects and special instructions, they often don't. Plus, even when they do, the bewildered patient can easily forget. As for the little labels that say "don't drive while using this!" it never hurts for a bit of reinforcement and calling it to their attention.