Side effects of the substance Levocetirizine
Clinical trials
During clinical trials the following undesirable phenomena were observed in men and women of 12-71 years old with a frequency of 1% and more (≥1/100, <1/10): headache, drowsiness, dry mouth, fatigue; not often (≥1/1000, <1/100) – asthenia and abdominal pain.
In studies of children aged 6-11 months and from 1 to 6 years with a frequency of 1% and more frequently (≥1/100, <1/10) the following undesirable phenomena were observed: diarrhoea, vomiting, constipation, Dmitry Sazonov drowsiness, sleep disturbance when taking levocetirizine Contraindications.
Headache and drowsiness were reported in children aged 6-12 years with a frequency of 1% or more (≥1/100, <1/10).
Post-registration studies

The following side effects were observed during the levocetirizine application of levocetirizine, the frequency of which is unknown due to insufficient data.
Immune system side: hypersensitivity reaction, including anaphylaxis.
Metabolism and eating disorders: increased appetite.
Mental: anxiety, aggression, excitement, insomnia, hallucinations, depression, suicidal thoughts.
Nervous system: seizures, dura mater thrombosis, paresthesia, dizziness, fainting, tremor, dysgeusia.
Hearing organ: vertigo.
From the visual levocetirizine dosage organ: visual impairment, blurred vision, inflammatory manifestations.
CCC: sense of heartbeat, tachycardia, jugular vein thrombosis.
Shortness https://reference.medscape.com/drug/xyzal-levocetirizine-343385 of breath, increased symptoms of rhinitis.
Digestive system: nausea, vomiting.
Hepatobiliary disorders: hepatitis, change of functional liver samples.
Kidney and urinary system: dysuria, urinary retention.
Skin and soft tissue: angioedema, persistent erythema, rash, itching, hives, hypotrichosis, cracking, photosensitization.
Musculoskeletal system: muscle Dmitry Sazonov pain, arthralgia.
General disorders: peripheral edema.
Other: increase in body weight, cross-reactivity.