NCT00004376

Who might be able to join this trial:

• You have been diagnosed with Tourette syndrome or another long-term tic disorder, based on standard medical guidelines (DSM-IV)
• You have also been diagnosed with Attention Deficit Hyperactivity Disorder (ADHD), based on standard medical guidelines (DSM-IV)
• Your ADHD has been rated as more than moderately severe by a clinician (confirm with trial site)
• Your ADHD symptoms score at a certain level or higher on a standard parent or teacher questionnaire (confirm with trial site)

Who may not be able to join:

• You have taken medication for tics, ADHD, or obsessive compulsive disorder within the last 2 weeks (or within the last 4 weeks for certain specific medications, including fluoxetine or antipsychotic medications)
• You have previously tried the medication guanfacine and it did not work for you
• You have liver failure
• You have kidney failure
• You have high blood pressure
• You have any other heart condition
• You have any lung or breathing condition
• Your IQ has been measured below 80
• You currently have a diagnosis of major depression, bipolar disorder, a developmental disorder, or a psychotic disorder
• You have a seizure disorder (such as epilepsy)
• You have another serious medical condition not listed here
• You are pregnant

Important: Always verify eligibility with the trial site directly before applying.