Hi doctors, was just wondering what is best medicine for cerebral atrophy?

Depends upon cause: As people age, brain size declines, but at your age, atrophy would be of concern. In some cases, atrophy is genetic associated with spinocerebellar degeneration. Toxic causes include recreational drugs and alcohol. Atrophy is a hallmark of dementias such as Alzheimers, Parkinson's, but also, a bad sign in MS. Treatment is directed toward cause and symptoms. No perfect approach.