The most frequently reported adverse effects with levocetirizine include diarrhea, constipation, otitis media, vomiting, cough, pyrexia, epistexis, asthenia, dry mouth, fatigue, headache, nasopharyngitis, pharyngitis, and somnolence.
Immune system disorders:
Metabolism and nutrition disorders:
Edema, increased appetite, weight gain.
Aggression, agitation, depression, hallucination, suicidal ideation.
Nervous system disorders:
Convulsion, dizziness, dysgeusia, extrapyramidal symptoms, febrile seizure, insomnia, movement disorders (including dystonia and oculogyric crisis), myoclonus, orafacial dyskinesia, paresthesia, seizure, syncope, tic, tremor.
Blurred vision, visual disturbances.
Ear and labyrinth disorders:
Respiratory, thoracic and mediastinal disorders:
Skin and subcutaneous tissue disorders:
Acute generalized exanthematous pustulosis (AGEP), angioedema, fixed drug eruption, pruritus, rash, urticaria.
Musculoskeletal and connective tissue disorders:
Renal and urinary disorders:
Dysuria, glomerulonephritis, urinary retention.
Pregnancy, puerperium and perinatal conditions:
Abnormal liver function tests, blood bilirubin increased, transaminases increased.