ANDAORALTABLET
Approved
Mar 1987
Lifecycle
Post-LOE
Competitive Pressure
30/100
Mechanism of Action
CLINICAL PHARMACOLOGY Mechanism of Action Codeine is an opioid agonist relatively selective for the mu-opioid receptor, but with a much weaker affinity than morphine. The analgesic properties of codeine have been speculated to come from its conversion to morphine, although the exact mechanism of…