I have myoclonic jerks, too, or periodic limb movement disorder as it's sometimes called. I've had them since before I started taking SNRI meds, but I have noticed that they get worse at higher doses. Actually, I was taking Zoloft when they started. I have read that SSRIs can make them worse. Maybe it's different for different people.

I need the SNRI med for fibromyalgia pain, so unless I figure out something else to take for that, I guess I'll keep having the PLMD.

Thanks for the update. Sorry to hear that you had a bad experience with Cymbalta.