Pentazocine differs from morphine in that:
A. It is inactive by the oral route
B. It does not produce physical dependence
C. It has a lower ceiling of analgesic effect
D. Its action is not blocked by naloxone
A. It is inactive by the oral route
B. It does not produce physical dependence
C. It has a lower ceiling of analgesic effect
D. Its action is not blocked by naloxone