Currently metopon, which has a DEA ACSCN of 9260, does not have an annual manufacturing quota listed in the Federal Register and the bulk of the research on the drug at this time is taking place in Germany, Switzerland, and Austria.
12.
In Canada, as of 1948, the hydrochloride of metopon ( free base conversion ratio 0.891, molecular weight 335.8 ) was available only for oral administration for malignant pain and for maintenance of those habituated to morphine; the only dosage form available was singly scored 8 mg tablets.
13.
Phenazocine was briefly used in the United States but fell out of favour for the above-mentioned reasons; it remains a Schedule II substance under the Comprehensive Drug Abuse Control & Prevention Act ( aka Controlled Substances Act ) of 1970 ( CSA ) but is not manufactured; other Schedule II narcotics not in use in the United States include bezitramide and metopon.
14.
A later synonym from 1844 was " L . leucometopon " from the Greek " leukos ", " white ", and " metopon ", " forehead ", describing a feature of the distinctive head pattern . " Shrike ", first recorded in 1545, derives from the shrill cries given by this family, and the traditional common name " butcher-bird " again refers to the characteristic prey storage,
15.
The clandestine conversion of morphine to ketones of the hydromorphone class or other derivatives like dihydromorphine ( Paramorfan ), desomorphine ( Permonid ), metopon, etc . and codeine to hydrocodone ( Dicodid ), dihydrocodeine ( Paracodin ), etc . is more involved, time-consuming, requires lab equipment of various types, and usually requires expensive catalysts and large amounts of morphine at the outset and is less common but still has been discovered by authorities in various ways during the last 20 years or so.
