ARS Pharmaceuticals (SPRY) said the US Food and Drug Administration approved a lower dosage of neffy for allergic emergencies, including anaphylaxis.
The regulator approved a 1 milligram version of the nasal spray for children 4 years and up, the company said Wednesday in a statement.
A 2 mg version of neffy, an epinephrine nasal spray, was approved in the US in 2024.
ARS shares rose 5.1% in after-hours trading.