A psychiatrist is an M.B.B.S. qualified doctor with specialisation in Psychiatry at post-graduation level (e.g.: M.D., D.P.M, D.N.B or their foreign equivalents) and he/she can prescribe medication for psychiatric illnesses. Psychologist is someone who has done a post-graduation in Psychology and uses tests and therapeutic methods to treat psychological problems. A counsellor is someone who has been trained in counselling methods and helps people manage their personal problems.