Psychiatric illness is often marked by abnormal brain function resulting in deteriorated mood, appetite, sleep, energy, motivation, memory, and concentration. A psychiatrist is a medical doctor who treats such symptoms. In some cases, psychotherapy is sufficient. In others medication is necessary. Successful treatment with psychiatric medication often involves dosage adjustment and trials of different drugs. The goal is always maximize response and minimize side effects. The expectation is symptom remission. A successful outcome depends on close co