NYTimes— F.D.A. Warned of Mental Side Effects from Asthma Drug, Singulair. The agency's risk-benefit calculus for montelukast has weighed its psychiatric risks (despair, hallucinations, suicidality) against its wide use in treating many patients for asthma. Also, Tylenol (acetaminophen) increases risktaking. #adverseeffects #mentalsideeffects