Compare
Onyda XR vs. Kapvay

Onyda XR (clonidine) is a non‑stimulant medication for attention-deficit hyperactivity disorder (ADHD). It's FDA approved for children 6 years and older. It can be used by itself or with stimulant ADHD medications. Onyda XR (clonidine) is an extended‑release liquid you take by mouth once each night at bedtime. Common effects include sleepiness, tiredness, and headache. Onyda XR (clonidine) can also lower blood pressure and slow the heart rate, so your care team might check these regularly.

• Attention-deficit hyperactivity disorder (ADHD) in children 6 years and older

• Drowsiness (31%–38%)
• Headache (13%–20%)
• Feeling tired (13%–16%)
• Upper stomach pain (10%–15%)
• Irritability (5%–9%)
• Dizziness (3%–7%)
• Trouble sleeping (5%–6%)
• Constipation (1%–6%)
• Nausea (4-5%)

• Low blood pressure and slow heart rate
• Possible heart rhythm problems
• Sleepiness and dizziness
• Dangerously high blood pressure after stopping Onyda XR (clonidine) suddenly
• Allergic reaction

Extended-release clonidine (Kapvay) is an alpha-2 agonist. It's a non-stimulant medication used to treat attention deficit-hyperactivity disorder (ADHD) in adults and children. Clonidine ER (Kapvay) is taken by mouth, typically twice per day. Some of the more common side effects include sleepiness and headache. This medication rarely causes insomnia (trouble sleeping), and isn't known to cause weight gain. Brand name Kapvay has been discontinued; clonidine ER (Kapvay) is only available as a generic medication.

• Attention-deficit hyperactivity disorder (ADHD) in people ages 6 years and older

• Sleepiness (up to 38%)
• Headache (up to 20%)
• Fatigue (up to 16%)
• Upper stomach pain (up to 15%)

• Blood pressure, heart rate, and heart rhythm problems
• Extreme sleepiness and dizziness
• Allergic reaction