occurs in has disease treated with drug TOLCAPONE IMATINIB LENALIDOMIDE Parkinson's disease aggressive systemic mastocytosis myelodysplastic/myeloproliferative neoplasm chronic myeloid leukemia multiple myeloma acute lymphocytic leukemia hypereosinophilic syndrome Elderly Adult muscle twitch AE muscle cramp AE 10028294 SZ, SS, YH WEB: http://www.nlm.nih.gov/medlineplus/musclecramps.html a muscle contraction AE that has an outcome of painful sensations, associated with muscle fatigue and low sodium/potassium