Your cat's size and weight will determine the proper dosage of L-carnitine supplements. Keep in mind that many cats will not show an improvement in health. In addition, some cats may even show an increase in diarrhea as the carnitine dosage in their diet is increased. An appropriately prescribed diet, with plenty of fluids, will be essential for preventing complications during this period.
Once carnitine treatment has begun, it is recommended that you continue regular veterinary check-ups with your cat. Your doctor will perform an echocardiogram (or EKG) every three to six months to ensure that treatment has been effective.
There are no known methods of prevention, other than maintaining a healthy diet for your cat.