Sources of opiold analgesic

Answer 1

1. Prescription medications such as oxycodone, hydrocodone, morphine, codeine, fentanyl, and tramadol.
2. Over-the-counter medications such as codeine-containing cough syrups or some combination pain relievers like Tylenol with codeine.
3. Synthetic opioids like methadone and meperidine.
4. Illicitly manufactured opioids such as heroin.