since naftidrofuryl belongs to the class of local anesthetics and is pharmacologically related to procainamide , certain precautions must be closely followed if it is administered intravenously : avoidance of rapid injection directly into the vein , limiting the infusion to 200 to 400 mg given over a 3 hour period using preferably a constant infusion syringe pump or an infusion pump , and using caution when associated with other medications , particularly antiarrhythmic agents which could affect atrioventricular or intraventricular conduction .
C0033216
procainamide
C0003195
antiarrhythmic agents