Hi, Thanks for writing in. Primidone is prescribed by some doctors to treat the tremor encountered in Parkinsons. However you are right is saying that the side effects of primidone are more difficult to manage than the tremor itself. Studies have been done concerning giving primidone in Parkinsons and it is seen that mean tremor amplitudes were not changed by primidone. Also Tremor frequency was unaltered by the medication. Many doctors say that long-acting propranolol is an useful adjuvant therapy for the tremors associated with Parkinson s disease. However medications are to be changed after asking your doctor. If you feel comfortable and tremors are slight then you can stop primidone and wait for your parkinsons specialist for a more suitable medication to treat your tremors. Please do not worry.