I started Sertraline several years ago for PMDD--although in retrospect, it was probably perimenopause. Definitely followed a pattern of hormonal change. I have been on and off it several times now, but I think my brain is now so used to it that I can't go off it. It works for me and I expect I'll take it for life. I'm a much better mother, wife, and employee on it. I can't control my emotions off it, and have an embarrassingly short fuse and thin skin. Whether or not I needed sertraline or actually needed HRT is a moot point, because it seems my brain chemistry demands I continue it. I had hoped that once I was stable on HRT, then the hormonal fluctuations would be a thing of the past, and I could discontinue sertraline. Doesn't seem to be the case for me. FWIW, it took a good 3 weeks for me to notice a benefit from taking it, and 6 weeks for me to feel very pleased with it. I take it continuously.