Zoloft muscle twitches

[TP57]

Hi,

I have OCD and GAD. I've been off and on Zoloft for 4 years.  1 year ago, after getting back on SSRI's after being off for 1 year, my Dr. put me on Lexapro. I started to freak out because I had leg muscle twitching. MInd you, I never had muscle twitches before while I was on Zoloft the pervious years. Anyway, the twitching made me more anxious and fueled my OCD. I started obsessing that I had ALS and would spend all day on the internet reading about ALS and thinking I was going to die a slow death.  Then my Dr. took me off Lexapro and put me back on 100 MG of Zoloft with a little Klonopin to help with the transition.  For 2-3 months, the twitches stopped. Now for the past month, my leg muscles are twitching a lot, especially at work in front of a computer.  I'm now freaking out again.  Muscle twitching is listed as an uncommon serious side effect on some sites.  I told my Dr., and he told me to take some magnesium, take 100MG 1 day, and then 50 MG the next day and keep alternating -and don't worry about it.  My Dr. did not give me any reason as to why the Zoloft makes my leg muscles twitch, or if it's a normal/harmless side effect.  My question is:  Is this muscle twitching experienced by other Zoloft users, and will this be permanent?  Why does it happen? And what usually stops it, lowering or raising the dosage?

Thanks