My doctor prescribed B to me and I have been on Zoloft for over 8 years. I also talked to the pharmacist who told me the same as my doctor that the liklihood of Serotonin Syndrome is rare. I am still worried though. How long would it take for me to notice if I would have a bad reaction and have Serotonin Syndrome? I read it would happen immediately or within up to 24 hours. Please someone ease my mind. THANKS.