FDA Approves Nonstimulant Liquid Onyda XR for ADHD

The US Food and Drug Administration (FDA) has approved Onyda XR (clonidine hydrochloride) for the treatment of attention-deficit/hyperactivity disorder (ADHD), drug manufacturer Tris Pharma announced in a statement.

The drug is the first approved liquid nonstimulant ADHD medication. The once-daily extended-release oral suspension, with nighttime dosing, can be used alone or as an adjunctive therapy to FDA-approved stimulant medications in pediatric patients aged 6 years or older.

“People with ADHD require a range of therapeutic options that are designed for their individual needs, because not every medication or type of therapy works for every patient,” Ann Childress, MD, a psychiatrist and president of the Las Vegas–based Center for Psychiatry and Behavioral Medicine, said in the release. 

“The approval of Onyda XR, the only liquid non-stimulant ADHD medication, with nighttime dosing that shifts the release profile, is a convenient option for patients needing better ADHD control,” she added.

The approval was based on “adequate and well-controlled studies” of the company’s extended-release tablets.

Onyda XR is contraindicated in patients with a history of a hypersensitivity reaction to clonidine. 

The medication can cause dose-related decreases in blood pressure and heart rate. Vital signs should be monitored frequently in at-risk patients. In studies with the extended-release tablets, somnolence and sedation were commonly reported adverse reactions. 

The sympatholytic action of clonidine may worsen sinus node dysfunction and atrioventricular block, especially in patients taking other sympatholytic drugs, the company noted.

Onyda XR should be available in pharmacies in the second half of 2024.

Alicia Ault is a Saint Petersburg, Florida–based freelance journalist whose work has appeared in publications including JAMA and Smithsonian.com. You can find her on X @aliciaault.