The signs of drug abuse and dependence depend on the drug and the person using the drug. Behaviours that may be signs of a drug problem include:
Having these signs doesn't always mean a person is using drugs. The behavior could be because of work or school stress, or it could be a sign of depression or another medical problem. But behavior changes like these are common in people who abuse drugs.
Physical signs of drug abuse and dependence include:
Last Revised: October 13, 2011
Author: Healthwise Staff
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