Vitamin B3 (niacin or niacinamide) 0.5 – 2 grams 3 times daily.
Vitamin B6 (for many) 250-500 m.g. daily.
A general B vitamin formula.
Vitamin C, 3 or more grams daily.
Zinc (gluconate or citrate) 50 m.g. daily.
Manganese 15-30 m.g. daily (if there is danger of tardive dyskinesia).