Meperidine, fentanyl, methadone, and propoxyphene are synthetic opioids. Codeine is the only opioid that has a morphine-related chemical structure that includes a 6-hydroxyl group. True allergic ...
Heroin is an illegal drug synthesized from morphine. Hydrocodone and oxycodone are semi-synthetic opioids, manufactured in labs with natural and synthetic ingredients. Fentanyl is a fully ...
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