Narcolepsy med shows early promise for adult ADHD

TOPLINE:

Solriamfetol – a medication approved for excessive daytime sleepiness caused by narcolepsy or obstructive sleep apnea – significantly improved symptoms of attention-deficit/hyperactivity disorder (ADHD) and clinical impression of ADHD severity in a pilot study of adults with ADHD.

METHODOLOGY:

• Solriamfetol is a dopamine and norepinephrine reuptake inhibitor that shares some of the properties of current ADHD medications.
• Researchers conducted a randomized, double-blind, placebo-controlled, dose-optimization trial of 75- or 150-mg solriamfetol in 60 adults with ADHD. For nearly all of the individuals who received solriamfetol, doses increased to 150 mg after the first week.
• The primary outcome was change in scores on the Adult ADHD Investigator Symptom Rating Scale (AISRS).
• Secondary outcomes included scores on the Clinical Global Impressions (CGI) scale and standard measures of executive function, behavior, and sleep.

TAKEAWAY:

• By week 6, total AISRS score improved 25% for 52% of individuals to took solriamfetol, vs. 17% of those who received placebo. Total AISRS score improved 50% by week 6 in 28% of those who took solriamfetol, vs. 3.4% of those who received placebo.
• By week 6, CGI ratings of “much improved” or “very much improved” occurred in significantly more individuals who received solriamfetol than those who took placebo (45% vs. 7%).
• Significantly more individuals who received solriamfetol than placebo self-reported improvements in executive function (69% vs. 34%). Improvement in wakefulness was noted with solriamfetol, but that did not moderate the change in ADHD symptom burden.
• Solriamfetol was well tolerated, with no significant effect on sleep quality or blood pressure. Adverse effects that occurred at a higher rate in the treatment group than in the placebo group were typical for solriamfetol and sympathomimetic agents used for ADHD.

IN PRACTICE:

^{Massachusetts General Hospital}

Dr. Craig B.H. Surman

“Solriamfetol may be a safe and effective treatment for ADHD in adults. Larger studies replicating these findings could confirm the strong evidence of benefit and the tolerability of this agent as a treatment,” lead author Craig B.H. Surman, MD, director of the clinical and research program in adult ADHD, Massachusetts General Hospital, Boston, said in a statement.

SOURCE:

The study was published online in The Journal of Clinical Psychiatry.

LIMITATIONS:

Limitations include the small sample size and short 6-week duration. More women than men received solriamfetol; it’s unclear how this could have affected the results.

DISCLOSURES:

The study was an investigator-initiated trial supported by Jazz Pharmaceuticals and Axsome Therapeutics. Dr. Surman has received consultant fees, research support, and royalties from multiple companies.

A version of this article first appeared on Medscape.com.