The Nurse Administers Narcotics to Surgical Clients

The nurse administers narcotics to surgical clients. Which statement represents the nurse's best understanding as it relates to the potency of different narcotics?

A) Morphine is more potent than codeine; it will produce more adverse effects.
B) Morphine is more potent than codeine; a lesser dose will be required.
C) Codeine is less potent than morphine; it will not produce an allergic reaction.
D) Codeine is less potent than morphine; it will not relieve pain as well.