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Oxycodone/aspirin
Oxycodone/aspirin (trade name Percodan) is a combination drug marketed by Endo Pharmaceuticals. It is a tablet containing a mixture of 325 mg (5 grains) of aspirin and 4.8355 mg of oxycodone HCl (equivalent to 4.3346 mg of oxycodone as the free base); it is used to treat moderate to moderately severe pain. The safety of the combination during pregnancy has not been established, although aspirin is generally contraindicated during pregnancy, and the drug has been placed in pregnancy category D. Inactive ingredients include D&C Yellow 10, FD&C Yellow 6, microcrystalline cellulose, and corn starch.〔 Percodan was first marketed by DuPont Pharmaceuticals and prescribed in the United States in 1950. At one time one of the most widely prescribed painkillers, it has largely been replaced by alternative oxycodone compounds containing paracetamol (acetaminophen) instead of aspirin, such as Percocet.
==Pharmacology==
The oxycodone component in the combination is technically 14-hydroxy-7,8-dihydrocodein-6-one, a white odorless, crystalline powder which is synthesized from the opium alkaloid thebaine. Thebaine by itself has no therapeutic value. Oxycodone is metabolized into oxymorphone. Unlike morphine and like codeine, oxycodone has a good oral potency. Prior to the introduction of paracetamol, Percodan was the mainstay in post-operative oral pain treatment due to the potency and long half-life of oxycodone. It originally contained a small amount of caffeine.
The usual dose is one tablet every six hours as needed for pain. The maximum daily dose should not exceed 12 tablets.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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