Myoclonus Dystonia (M-D) is a rare, inherited movement disorder in which patients experience myoclonus - sudden, brief, jerky involuntary motions, often in association with dystonia - involuntary sustained contractions causing twisting or abnormal posture. While most M-D patients respond significantly to alcohol, there are no approved medications for M-D. A variety of medications are currently used to treat M-D, but these treatments work in a small proportion of patients and provide only partial improvement in symptoms; their use is also limited by side-effects in many patients.