Various complications to convulsant drug therapy in mental diseases have been stressed in recent reports. These complications have consisted of fractures, dislocations, cardiac irregularities, the development of abnormal neurological signs, etc. Little comment has been made on the behaviour of the patient or the mental state following the use of such treatment, except to say that there was or was not improvement. The fact that patients frequently pass through interesting and perhaps significant stages in their recovery, or failure to recover, is worthy of comment.