The active agent in codeine is
A) codeine itself, without other compounds being involved.
B) morphine obtained from biotransformation of codeine.
C) able to bind at the opioid sigma receptor site to initiate the blockade of pain signals.
D) best absorbed when this compound is injected into muscle tissue.

Question

Quizplus · Accepted Answer

Codeine is metabolized in the liver to morphine, which is the active agent responsible for its analgesic effects.

The Active Agent in Codeine Is