A method for ameliorating a motor symptom in a subject wherein the motor symptom is caused by a disorder selected from the group consisting of olivo-ponto-cerebellar atrophy, multi-system atrophy, Shy-Drager syndrome, kernicterus, Leigh's Disease, cerebellar ataxias, neonatal hypoxemia syndromes, carbon monoxide poisoning, progressive supranuclear palsy, tardive dystonias, oculogyral crises, manganese poisoning, Wilson's Disease, Huntington's Disease, striatonigral degeneration, ingestion by the subject of phenothiazines, butyrophenones or reserpine, Alzheimer's Disease, normal pressure hydrocephalus, physiologic tremor, benign familial tremor, cerebellar tremor, rubral tremor, toxic tremor, metabolic tremor, senile tremor, chorea, ballism, athetosis, dystonia, tics, tardive dyskinesia, paroxysmal choreoathetosis, tonic spasm, akathisia, muscle rigidity, postural instability, bradykinesia, difficulty in initiating movements, muscle cramps, dyskinesias, myoclonus and Creutzfeldt-Jacob Disease, and wherein the subject does not suffer from Parkinson's Disease, comprising administering, to the subject, a therapeutically effective amount of famotidine or a famotidine-related compound.