The D.E.A. is increasing its quota for the popular stimulant as patients still struggle to fill prescriptions.

Patients and caregivers have struggled for two years to find stimulant medications like Adderall, Vyvanse and Concerta to treat attention deficit hyperactivity disorder. Some spend hours each month going from pharmacy to pharmacy to find a drug, while others are forced to switch to a different brand or formulation, or go without medication for weeks.

This week the Drug Enforcement Administration announced a potential solution: It is raising the amount of lisdexamfetamine (Vyvanse) that can be produced by U.S. manufacturers this year by nearly 24 percent to meet demand in the United States and abroad.

Vyvanse is an amphetamine that has been approved for use in children and adults with A.D.H.D. and has become commonly prescribed after the generic version was introduced last year. According to the D.E.A., the latest data shows that demand for the drug has been rising globally. But right now every manufacturer of generic Vyvanse listed on the Food and Drug Administration website is experiencing a shortage.

Many health care providers who specialize in treating patients with A.D.H.D. said that the D.E.A.’s decision was a positive development but that it was unclear just how much of an effect it might have on the shortage.

“Obviously it’s not going to solve the problem completely,” said Ami Norris-Brilliant, clinical director of the Division of A.D.H.D., Learning Disorders, and Related Disorders at the Icahn School of Medicine at Mount Sinai in New York City. “But I think anything that helps increase drug availability is a good thing.”

It is not the first time that the D.E.A. has increased production quotas for A.D.H.D. drugs. Last year it announced a new 2023 limit for methylphenidate, which is used to make drugs like Ritalin and Concerta, raising the allotted amount by 27 percent for 2023. The drug remains in shortage, however, in the extended release formulation.

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