of 38,221 hospitalized medical patients monitored by a drug surveillance program , 1821 ( 4.8 per cent ) received morphine , 504 ( 1.3 per cent ) received codeine , 493 ( 1.3 per cent ) received papaveretum , 115 ( 0.3 per cent ) received hydromorphone , and 101 ( 0.3 per cent ) received methadone parenterally .
C0026549
morphine
C0009214
codeine