controlled substance

(redirected from controlled substance, a)

controlled substance

A drug whose availability is limited by law. A: "I thought you could just find your medication on the shelf at the pharmacy." B: "Nah, I'm on a new one, and it's a controlled substance, so I have a prescription for it." I'm really glad I didn't follow in my brother's footsteps and become addicted to controlled substances.
See also: control, substance
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.
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