Aripiprazole in Children and Adolescents With Chronic Tic Disorder or Tourette's Disorder

Inclusion Criteria:

1. Patients who can provide an assent form signed by themselves and informed consent form by their legal representatives prior to performing of any study procedures.
2. Male or female children and adolescents aged 6 to 18 years
3. Patients who are diagnosed with chronic tic disorders(Motor or Phonic) or Tourette's disorder according to DSM-IV (using K-SADS-PL-K) and require drug therapy.
4. The total tic score of the K-YGTSS is more than 22 at baseline

Exclusion Criteria:

1. Patients with secondary tic symptoms accompanied by Tardive tics, Huntington disease, neuroacanthocytosis, mental retardation, or autism
2. Patients with IQ (assessed using KEDI-WISC) 70 and lower than 70
3. Patients with a history of neuroleptic malignant syndrome
4. Patients with antipsychotic or alcohol use disorder (abuse, dependence, and/or withdrawal) according to DSM-IV criteria for the past 3 months
5. Patients with a history of allergy or hypersensitivity reaction to aripiprazole
6. Patients with a history of resistance to treatment with antipsychotics
7. Patients who have participated in another clinical study within 1 month prior to screening
8. Patients who have previously taken aripiprazole or participated in a clinical study with aripiprazole