Therapists are licensed psychologists or counselors but are not medical doctors, and in most states in the U.S. they are not allowed to prescribe medication. Only five states allow licensed psychologists to prescribe medication—Idaho, Illinois, Iowa, Louisiana, and New Mexico—and psychologists in these states must complete additional psychopharmacology training and certification.
In the rest of the U.S., only a medical doctor can prescribe medication. Psychiatrists attend medical school and can prescribe medication, but they typically do not provide talk therapy or counseling services.