Hi, My doctor says that I've tried a different medication from all of the major categories of anti depressants apart from one which he said you only do as a last resort. The reason is because every anti depressants he's given me causes bad side effects that I cant tolerate and I cant take them long enough to notice any benefit. My question is, is he right to only try one medication from each category? Are other medications from the same category likely to cause the same side effects?