RITALIN SHOULD NOT BE USED CONCURRENTLY OR WITHIN THE PROCEEDING TWO WEEKS OF MAO INHIBITORS BECAUSE OF POSSIBLE EFFECTS ON BLOOD PRESSURE.
METHYLPHENIDATE MAY DECREASE THE EFFECTIVENESS OF DRUGS USED TO TREAT HYPERTENSION. METHYLPHENIDATE MAY INHIBIT THE METABOLISM OF COUMARIN ANTICOAGULANTS, ANTICONVULSANTS (E.G., PHENOBARBITAL, PHENYTOIN, PRIMIDONE), AND TRICYCLIC DRUGS (E.G., IMIPRAMINE, CLOMIPRAMINE, DESIPRAMINE). SERIOUS ADVERSE EVENTS HAVE BEEN REPORTED IN CONCOMITANT USE WITH CLONIDINE.