Phase III Randomized, Double-Blind, Placebo-Controlled Study of Guanfacine for Tourette Syndrome and Attention Deficit Hyperactivity Disorder

PROTOCOL ENTRY CRITERIA: --Disease Characteristics-- * Tourette syndrome or other chronic tic disorder meeting Diagnostic and Statistical Manual of Mental Disorders-IV (DSM-IV) criteria * DSM-IV diagnosis of attention deficit hyperactivity disorder (ADHD) Clinician's Global Impression for ADHD greater than 4 Hyperactivity Index of Conners Parent or Teacher Questionnaire standard score 65 or higher (1.5 standard deviation units) --Prior/Concurrent Therapy-- * At least 2 weeks since medication for tics, ADHD, or obsessive compulsive disorder (4 weeks since neuroleptics or fluoxetine) * No failure on prior guanfacine --Patient Characteristics-- * Hepatic: No liver failure * Renal: No renal failure * Cardiovascular: No hypertension No other heart disease * Pulmonary: No pulmonary disease * Other: No Intelligence Quotient below 80 No current DSM-IV diagnosis of the following: Major depression Bipolar disorder Pervasive developmental disorder Psychotic disorder No seizure disorder No other significant medical condition No pregnant women