Letizen (Cetirizine Dihydrochloride)

Cetirizine, the active ingredient in Letizen, is an antihistamine presented as an oral tablet for oral use. It alleviates symptoms of allergic rhinitis, urticaria (hives) and other allergic skin conditions in both adults and children, reducing itching, sneezing, nasal discharge and watery eyes.

GNH USA supplies Letizen as a licensed, GDP‑compliant international pharmaceutical supplier serving hospitals, pharmacies and clinics worldwide. The company adheres to stringent quality standards and provides regulatory documentation for cross‑border distribution, ensuring product integrity and patient safety.

Letizen (cetirizine) is used to manage allergic conditions by blocking histamine activity.

- Allergic rhinitis: reduces nasal congestion, sneezing, itching and watery eyes associated with seasonal or perennial pollen exposure. - Urticaria (hives): relieves itching and diminishes the formation of raised, red wheals on the skin. - Other allergic skin conditions: eases symptoms of dermatitis and insect‑bite reactions by limiting histamine‑mediated inflammation.

Cetirizine is generally well tolerated, but some users may experience adverse reactions.

Common Side Effects: - Drowsiness: mild sleepiness, especially at higher doses. - Dry mouth: sensation of reduced salivation. - Headache: transient mild to moderate pain. - Fatigue: feeling of reduced energy.

Serious or Rare Side Effects: - Anaphylaxis: severe allergic reaction requiring immediate medical attention. - Stevens‑Johnson syndrome: rare skin disorder with blistering and mucosal involvement. - Hepatic dysfunction: abnormal liver enzymes in very rare cases.

Before using Letizen, consider the following precautions. - Pregnancy: safety not established; use only if benefit outweighs risk. - Breastfeeding: cetirizine passes into milk; consult healthcare professional. - Renal impairment: dose adjustment may be needed; monitor renal function. - Elderly: increased sensitivity to sedation; start with lowest effective dose. - Concomitant CNS depressants: may enhance drowsiness; caution advised. - Store at ambient temperature: keep below 25 °C, protect from moisture and direct sunlight.

Cetirizine may interact with other medicines; review the following categories.

Major Interactions (Avoid): - Alcohol: additive sedative effect may impair alertness. - Strong CYP3A4 inhibitors (e.g., ketoconazole): can increase cetirizine plasma levels.

Moderate Interactions (Monitor Closely): - Antacids containing aluminum or magnesium: may reduce absorption; separate administration by at least 2 hours. - Theophylline: may slightly increase cetirizine concentrations. - Other antihistamines: additive antihistaminic effect may increase risk of drowsiness.