Haloperidol-induced tardive dyskinesia in a child with Gilles de la Tourette's disease.

A 7-year-old boy with multiple tic or Gilles de la Tourette's disease was treated with haloperidol. Within five months, lingual-buccal-facial movements developed that were characteristic of tardive dyskinesia. This new movement disorder disappeared after treatment with haloperidol was stopped. To our knowledge, this is the first report of tardive dyskinesia complicating the use of haloperidol in the treatment of multiple tic syndrome in a child.