Primidone (Mysoline) was developed and is mainly used to control the convulsions of epilepsy; but as a side effect it also alleviates the tremor of "essential tremor" resistant to the usual PD drugs. It is one of two drugs currently approved for that (at dosage less than a quarter of that used to treat epilepsy). The other is propranolol (Inderal) which often has the unwanted effect of depressing heart rate. I find also that a glass of beer or wine quickly stops non-PD action tremor, but only for 1/2 hour or so. I could live with that if I could afford it. Cheers, Joe -- J. R. Bruman (818) 789-3694 3527 Cody Road Sherman Oaks, CA 91403-5013