I began taking Vimpat for Parkinson's Disease 3 weeks ago and it has been awful with the more common side effects of nausea and vomiting. My Pharmacist confirmed that I was having side effects from Vimpat rather than any of my other prescriptions. He recommended that I stop taking it and call my doctor, which I have.. My last dose of 50 mg was at 11:30 this morning... I have been throwing up and diarrhea every day and this afternoon. When will it be out of my system?