PATIENTS RECEIVING GANGLION BLOCKING COMPOUNDS WITH THIS DRUGS PRODUCED FALL IN BLOOD PRESSURE. ATROPINE ANTAGONISE THE MUSCARINIC EFFECTS OF IT. AMINOGLYCOSIDES, CLINDAMYCIN, COLISTIN, CYCLOPROPANE, AND THE HALOGENATED INHALATIONAL ANAESTHETICS. IT MAY ANTAGONISE THE EFFECTS OF BETHANECHOL CHLORIDE.