natural opiates phenantrenes
morphine codeine thebaine
semisynthetic compounds (phenantrenes) moderate analgesic
ethylmorphine
dihydrocodeine
hydrocodone
semisynthetic compounds (phenantrenes) strong analgesic
heroin hydromorphone oxymorphone oxycodone
mixed (mu antagonist and K agonist)
nalbuphine
mixed (mu partial agonist/k antagonist)
buprenorphine
opioids antagonist
naloxone naltrexone
synthetic compounds diphenylheptans
methadone
synthetic compounds phenylpiperidines
meperidine
fentanyl alfentanil sulfentanil remifentanyl
diphenoxylate loperamide
mixed (mu partial agonist/k agonist)
butorphanol pentazocine
other synthetic analgesics
tramadol tapentadol