Melatonin can improve the symptomatology of Parkinson's disease, in a fast or slow way,according to the case.
There is no fixed rule: the effects of Melatonin vary according to age,sex,stage of disease, and therapy.
Patients have been observed over the years and a constant improvement and often complete recovery have been documented in Parkinson's disease even at advanced stage .
Therapy with Melatonin should be followed for years,because the improvement is sometimes evident only after taking it for a long time.
A dosage of 5 mg.before going to bed in the evening is sufficient