Generally, any antidepressant or antianxiety medication, especially
one prescribed and taken every
day. "Crazy pills" is a
light-hearted, self-deprecating
way of talking about these medications with close friends, trusted acquaintances, etc., without bringing the associated (and unnecessary) social stigma along for the ride. If used in conversation with a person you do not know, the intended meaning may be lost.
Common examples: Zoloft (sertraline), Lexapro, Wellbutrin.