In infants and toddlers aged 6 to 23 months, the most frequent adverse events reported were diarrhoea, fever and insomnia.
In a range of indications including SAR and CIU, at the recommended dose of 5 mg daily, the most frequent adverse events reported were fatigue, dry mouth, and headache.
Very rare cases of hypersensitivity reactions, including anaphylaxis and rash have been reported during the marketing of desloratadine. In addition, cases of tachycardia, palpitations, psychomotor hyperactivity, somnolence, seizures, elevations of liver enzymes, hepatitis, increased bilirubin and increased appetite have been reported very rarely.