I had serotonin syndrome (poisoning) after taking Zoloft for years.I was ill with nausea ,muscle weakness and stiffness and excessive sleepiness. I went into seizures and sent to emergency room. Has anyone else had this happen? It has been 2 years and I am just now getting better.After quitting Zoloft, my IBS and other 'disorders' disappeared. I would like to hear from anyone who experienced the same.