My dad is 55 years old, struck by depression 1.5 years back due to thyroid fluctuation. The medicines are continuing since then at same mg. So we thought of taking second opinion. However, the new doc changed the mg from 200 mg to 20 mg. We see an adverse impact on him. He has started talking properly but taking tensions again, stay in bed all the time and feel no strength in body. Pls suggest what should be done.