Concurrent use of butorphanol with central nervous system depressants (e.g., alcohol, barbiturates, tranquilizers, and antihistamines) may result in increased central nervous system depressant effects.
<butorphanol, effect, central nervous system depressants>, <butorphanol, effect, alcohol>, <butorphanol, effect, barbiturates>, <butorphanol, effect, tranquilizers>, <butorphanol, effect, antihistamines>