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Only the patient doesn't know if they will recieve a placebo or the drug.

A _________ drug, one which is used for fun.

When someone has take a substance for so long or often, that they become reliant on it, and suffer withdrawal symptoms if they cannot have it.

A substance which, if consumed, changed the body or it's reactions.

A drug used for medical purposes.

llegal drugs used by athletes to give an advantage in competition.

Testing a drug to ensure that it works properly and has no harmful side effects.