### Human:\nare there medical tests for people with depression to find out if the proper medications and the amount given are correc. if antidepresants are given to a patient by a psycologist is it appropriate to make the diagnosis and what drugs and the amount used only from a 10 minute questionare or are there actual medical tests that can be performed to diagnose and treat mental illness?\n\n### Assistant: most helpful answer there are no special tests like blood tests to make that determination. the choice and dosage of anti-derpressant medication is based solely on the medical history and a bit of "trial and error". until the proper medication and dosage is found changes are often made. i am not saying this ten minute questionaire was appropriate but a skilled medical provider can usually pick the right combination of medications and counselling to help.