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Abstinence

Abstinence is the absence of substance use. There are many different ways to practice abstinence. Continuous abstinence: not consuming the drug of choice during a specified period of time Essentially abstinent: not consuming more than a specified amount of the drug...

Physical dependence

Physical dependence is adaptation to a drug that produces symptoms of withdrawal when the drug is stopped.

Opiates

A natural opiate derived directly from the natural opium poppy plant (see opioids).

Opioid analgesics

Opioid analgesics are commonly referred to as prescription opioids, medications that have been used to treat moderate to severe pain in some patients. Categories of opioids for mortality data include: Natural opioid analgesics, including morphine and codeine;...

Nonmedical use

Nonmedical use is the taking of prescribed or diverted prescription drugs (drugs not prescribed to the person using them) not in the way, for the reasons, in the amount, or during the time-period prescribed.