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Opioids include any drug that acts on opioid receptors in the brain, and any natural or synthetic drugs derived from or related to the opium poppy. Opioids bind to opioid receptors which depress the central nervous system, and slow down messages traveling between the brain and body. 


Drug Classification

Drug Schedule

Schedule II

Body Temperature

Pupil Size


Reaction to Light

Muscle Tone

Short Term Side Effects

Long Term Side Effects

Other Side effects

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