Have taken zoloft for 3 months, sometimes you don't know how well a drug does until you stop taking it. After the 3 months, I quit for two weeks. During my last 7 days after stopping the drug my head was buzzing, not a headache, but a irritating buzzing noise that would start and stop at any given time. Got back on the drug and the next day the buzzing stopped. I do feel better at 50mg, it's worth the money and time.