Opioids
Opioids are powerful pain killers that are highly addictive. They can be divided into 3 classes: Naturally occurring opioids: These occur naturally & include morphine, narcotine, codeine, thebaine, papaverine and narceine. Semi-synthetic opioids: These include heroin, oxycodone, oxymorphone, and hydrocodone. Synthetic opioids: These include buprenorphine, methadone, fentanyl, alfentanil, levorphanol, meperidine, and propoxyphene. Opioids can be taken orally, snorted …