Just increased dosage for ET focused mostly in hands. Tremors seem unusually bad, and are way more than a tremor, as the time for next dose approaches. Doctor says this is not a side effect, but I am finding it unmanageable. This new kind of tremor makes me do things like fling food off the plate. Have had ET for many years, started Primidone about 10 yrs ago. Take 3 and 4 on alternating days, split into morning and night. It makes me extremely sleepy and groggy all the time, but the primidone was helping