Usually desloratadine well tolerated, but sometimes there may be side effects. The most common side effects are fatigue, dryness of the oral mucosa and headache.
Mental disorders: hallucinations.
From the nervous system: headache, dizziness, drowsiness, insomnia, psychomotor hyperactivity, convulsions.
From the heart: tachycardia, palpitation.
From the gastrointestinal tract: dryness of the oral mucosa, diarrhea, abdominal pain, nausea, vomiting, indigestion.
From the hepatobiliary system: increased activity of liver enzymes, increased concentrations of bilirubin, hepatitis.
From the musculoskeletal system and connective tissue: myalgia.
Common violations: hypersensitivity reactions (including anaphylaxis, angioedema, dyspnea, itching, rashes and urticaria), increased fatigue.