"R05" . "Hydrocodone is a semi-synthetic opioid synthesized from codeine, one of the opioid alkaloids found in the opium poppy. It is a narcotic analgesic used orally as an antitussive/cough suppressant, but also commonly taken orally for relief of moderate to severe pain.Hydrocodone is prescribed predominantly within the United States, with the International Narcotics Control Board reporting that 99% of the worldwide supply in 2007 was consumed in the United States."@en . . "5779" . "4,5α-epoxy-3-methoxy-17-methylmorphinan-6-one"@en . "125-29-1" . "DB00956" . "6YKS4Y3WQ7" . . "DA03" . "5284569" . .