Get our free Procainamide coupon and be eligible to receive a discount. You can reduce your Procainamide cost by up to 75% with our free Procainamide discount card. Bring it to a participating pharmacy near you to save on your prescription medication.Oral forms of procainamide (tablets and capsules) are no longer marketed in the U.S. Procainamide affects the way your heart beats. Procainamide is used to treat seriously irregular heartbeat patterns. Procainamide may be used for other purposes not listed in this medication guide.