POTENTIATES CNS DEPRESSANTS (ALCOHOL, BARBITURATES, ANALGESICS, SEDATIVES AND NEUROLEPTICS), MAOIS. ATROPINE, TRICYCLIC ANTIDEPRESANTS ENHANCE ANTIMUSCARINIC EFFECT. MASKS OTOTOXICITY PRODUCED BY AMINOGLYCOSIDES ANTIBIOTICS. POTENTIATES THE EFFECT OF ALPRAZOLAM & OTHER BENZODIAZEPINES.