Myoclonus following severe asthma: clonazepam relieves.

Three cases of severe asthma requiring mechanical ventilatory support after sudden cardiorespiratory collapse developed myoclonus following the hypoxemic insult. They were unable to stand, walk or feed themselves because of these jerky involuntary movements which were worse on intention. Oral clonazepam in varying doses up to 8 mg daily improved the myoclonus remarkably such that they were able to perform these functions unaided.