psychiatrists are trained medical doctors, they can prescribe medications, and they spend much of their time with patients on medication management as a course of treatment.

Psychologists focus extensively on psychotherapy and treating emotional and mental suffering in patients with behavioral intervention. Psychologists are also qualified to conduct psychological testing, which is critical in assessing a persons mental state and determining the most effective course of treatment.

This is a very approximate answer but you can get a insight in some lines.

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