A person’s diminished response to a drug that is the result of repeated use. The body adapts to the substance, requiring increasingly larger doses to achieve the original effects.

How Oxycodone Use Can Lead to Heroin Addiction
5 Healthy Activities After Beating Meth Addiction
Can Schizophrenics Drink Alcohol Safely?
5 Myths About Pain Pill Abuse
6 Drug Use Myths You Need to Stop Believing

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