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biological

Judged: two independent readers; copy check clear.

Demerol

Demerol Demerol is meperidine hydrochloride, a synthetic opioid drug.

Demerol is meperidine hydrochloride, a synthetic opioid drug. It acts at opioid receptors to produce morphine-like effects such as pain relief, sedation, euphoria, slowed breathing, pinpoint pupils, slowed heart rate, and physical dependence.