Conditions: Attention Deficit Hyperactivity Disorder (ADHD)
Keywords: cardiovascular testing home blood pressure monitoring office home blood pressure monitoring cardiopulmonary exercise testing transthoracic echocardiography Lisdexamfetamine Vyvanse normotensive and hypertensive adults with ADHD ADHD medication.
Allocation: NA | Intervention model: SINGLE_GROUP
Enrollment: 24
Healthy volunteers: no

Brief summary:
The purpose of this research study is to learn about the effects of a medication called Vyvanse on the heart (cardiovascular system). The U.S. Food and Drug Administration (FDA) has approved Vyvanse for the treatment of Attention Deficit Hyperactivity Disorder (ADHD). People who have ADHD have trouble paying attention, organizing, and planning; these symptoms can cause problems at work, socially and at home.

Vyvanse (also known as Lisdexamfetamine) is a stimulant class medication. There have been reports of serious cardiovascular effects in children and adults treated with stimulants. While there is no definite evidence that these events were related to the use of stimulants, the deaths have raised questions about the cardiovascular safety of stimulants.

The study will involve in-depth cardiovascular tests, namely echocardiograph (ultrasound of the heart) and cardiopulmonary exercise test (also called stress test; subjects exercise on a bicycle while measuring their heart activity and breathing is monitored by cardiologists).

The investigators predict to see changes in blood pressure and heart rate as shown in previous clinical studies, and that the in-depth cardiovascular tests will provide new insights into the cardiovascular impact of stimulants.

Detailed description:

Arms:
arm 1: Adults who meet DSM-IV-TR criteria for ADHD.

Group 1 is normotensive adults; Group 1 does not have high blood pressure. Group 2 is primary hypertensive adults; Group 2 does have high blood pressure and is being treated with stable doses of hypertensive medications achieving a blood pressure of \<135/85.

Interventions: intervention 1: Lisdexamfetamine
Intervention descriptions: intervention 1: Lisdexamfetamine daily until the completion of participation in the clinical trial (up to Week 11 or final study visit). Subjects will start on 30 mg of LDX per day for the first week of treatment. The dose will be increased weekly in 20 mg increments, up to a 70 mg daily (maximum). If significant adverse effects (AE) occur, the daily dose may be reduced by 20 mg. At subsequent visits, a higher dose may be resumed if tolerated. Both cohorts of the study will follow the same treatment plan.

Protocol document: