hi... i have been on zoloft for about 3yrs and there have been times that i have just stopped and i think i have had medication withdrawals but im not sure, i would panic and shiver but wouldnt be cold. Is that zoloft withdrawals? I have also just started working and because of this i started taking my zoloft again as i notice a BIG difference in my behaviour if i dont, anyways i have been having panic attacks and i dont no what is causing this... im not actually thinking about anything when this happens. Can someone give me answers. I have made my zoloft dose higher as nurses have recommended it but my GP wouldnt do it so i did it myself. im alot happier but suffering with panic attacks.