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Opium is a highly addictive narcotic drug acquired in the dried latex form of the opium poppy (Papaver somniferum) seed pod. Heroin is derived from the morphine alkaloid found in opium; synthetic or semisynthetic opium derivatives include fentanyl, methadone, oxycodone and hydrocodone. Street names are: Aunti,...

Oxazepam is a benzodiazepine (ben-zoe-dye-AZE-eh-peen) that is used to treat anxiety disorders. Oxazepam may also be used short-term to treat symptoms of insomnia and alcohol withdrawal syndrome. This drug is short to medium acting that treats chemicals in the brain that may become unbalanced...

Oxycodone is used to relieve moderate to severe pain. Oxycodone extended-release tablets and extended-release capsules are used to relieve severe pain in people who are expected to need pain medication around the clock for a long time and who cannot be treated with other medications....

OxyContin (oxycodone) is an opioid pain medication sometimes called a narcotic. OxyContin is a strong prescription medicine used when an opioid medicine is needed to manage severe pain enough to require daily around-the-clock, long-term treatment with an opioid. ...

Oxymorphone (sold under the brand names Numorphan and Opana among others) is a highly potent opioid analgesic indicated for treatment of severe pain. Oxymorphone belongs to the group of medicines called narcotic analgesics (pain medicines). It acts in the central nervous system (CNS) to relieve...