A follow-up of 78 patients with Gilles de la Tourette's syndrome

The authors conducted a follow-up study of 78 patients with Gilles de la Tourette's syndrome. Four of the patients were in spontaneous remission; 59 patients taking haloperidol showed an average improvement of 79.3% and the remaining patients, 3 of whom were taking medication other than haloperidol and 12 of whom were not taking any medication, showed an average improvement of 24.7%. Side effects were the main cause of discontinuing haloperidol. The authors found that response to haloperidol was unrelated to family history of tics, age at onset, type or severity of symptoms, or signs of organicity.