seizures
"Though not indicated in the literature, I found that a few days after starting the Vimpat titration kit I began to experience extreme soreness in the legs.  It may not have been from the medication but I had not done any physical activity that would have caused such soreness in the muscles in my legs and lower extremities. Though I cannot say for certain that it was a side effect of taking Vimpat it does seem that the symptoms only emerged a couple of days after beginning the titration kit of Vimpat 50 mg twice a day leading to Vimpat 100mg twice a day. I am interested in sharing this to see if anyone else has had similar experiences because this is not a symptom listed in the medicine guide or any other lists of side effects of Vimpat."