The New York attorney general on Thursday urged the Food and Drug Administration to “take immediate action” and renew alerts to doctors and patients about the dangerous effects of Singulair for children, saying that the current warnings about the drug’s psychiatric side effects were not sufficient.

In a letter, the attorney general, Letitia James, also called on the federal agency to consider discouraging the prescription of Singulair, an asthma and allergy drug, to children.

Thousands of patients and parents have complained to the F.D.A. about symptoms of anxiety, rage, hallucinations and other psychiatric problems that they linked to the drug, which is also known in its generic form as montelukast. Those reports, combined with an emotional F.D.A. hearing in 2019 and cases cited in medical literature, led the F.D.A. in 2020 to order its most stringent warning on instructions for the drug’s usage.

But an examination by The New York Times found that people continued to report that they were not aware of the possible side effects, which include suicide or suicide attempts, when they took the medication or gave it to their children.