Interacting Drug Comments Antiarrhythmic Rifampin appears to substantially enhance the agents metabolism of several antiarrhythmic drugs such as disopyramide, mexiletine, propafenone, quinidine, and tocainide
. An adjustment in antiarrhythmic dosage may be needed if rifampin therapy is initiated, discontinued, or changed.
Other discharge medications were atenolol 50 mg/d, triamterene 50 mg/hydrochlorothiazide 25 mg daily, dipyridamole 100 mg four times daily, tocainide
600 mg three times daily, probenecid 1 g twice daily, and dicloxacillin 1 g four times daily.