Took zoloft 50mg for 8 yrs with no problems in may I experienced a bad panic attack was increased to 75 which after about 8 weeks was increased to 100 bc of break thru aniexty. It has now been about 6 weeks and dr wants to increase to 125 it has now been over three months dealing with increases. Should I increase or ask for a different medication. I am worried about withdrawal from one medication to another. Dr has suggested increases and not switching meds bc Zoloft did work for such a long period of time