I've been on Sertraline for years & had decided to try & come off for several reasons - I don't think it's working for me anymore & I've gained 2 stone in weight. Plan was to taper dowm but my prescription ran out so i just stopped taking them. I actually feel OK apart from awful nightmares/disturbed sleep. Could this be connected or just coincidence? I do fully realise that going cold turkey is perhaps not the best way to do this. Has anyone else experienced this?