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This is a very complex decision and should not be taken without her current psychiatrist
is a mood stabilizer
and can be used in bipolar patient even when they do not have manic or depressive episode as its primary role is to prevent future episode in such cases.
Manic and depressive episode can occur in patient with dementia
also. Apart from that drug dose change related decision will take, consideration of: whole psychiatric history, last illness episode, severity of episode and current medical condition of patient.
I hope this information has been both informative and helpful for you.
Wish you Good Health.
Dr. Ashish Mittal