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slang Someone who frequently or habitually uses or abuses drugs prepared as pills or capsules. She started getting hooked on the pain pills her doctor prescribed, and before long she had become a full-blown pillhead. I knew a couple of pillheads in college who were always doing speed or ecstasy.
pillheadand pill freak
n. a drug user who prefers drugs in pill or capsule form. (Drugs.) The police turned the juvenile “pillheads” over to their parents. You pill freaks should try some of this stuff.