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Levocetirizine

Medication non-sedating antihistamine allergy
Aka: Xyzal
Brands seen in Singapore: Xyzal, Levozine, Allerzal, Alerinit, Stadeltine
Not medical advice. Check with your doctor or pharmacist before you start, stop or change the timing of anything you take.
How to use
What it’s for
Runny nose, itchy eyes, nose or skin, allergic rash
When to take
HealthHub: when needed for symptoms · FDA: in the evening
Take with
HealthHub: with or without food · swallowed whole
Pros & cons
Pros
  • SG label: 5 mg once daily from 6 years upward
  • HealthHub: a newer antihistamine, less likely to sedate
  • SG exemption: up to 10 tablets from a pharmacist
Cons
  • FDA: somnolence, fatigue, dry mouth reported
  • FDA: urinary retention reported — care with prostate
  • FDA: new itching can follow stopping long-term use
Sources
  1. HSA — Listing of Registered Therapeutic Products (open dataset on data.gov.sg; same register as HSA Infosearch) · read 2026-08-27
    what it says
    “5 levocetirizine 5 mg tablets on the register: 4 'Pharmacy Only' — SIN14505P Levozine, SIN14939P ALLERZAL, SIN16312P ALERINIT, SIN16480P STADELTINE — and 1 'Prescription Only', SIN16028P XYZAL FILM-COATED TABLET 5 MG.”
  2. MOH National Drug Formulary — XYZAL FILM-COATED TABLET 5 MG [SIN16028P], SG product information (last updated 28 July 2026) · read 2026-08-27
    what it says
    “PRESCRIPTION ONLY MEDICINES … Exemptions for Supply without Prescription: As an oral solid preparation containing not more than 5mg … Maximum daily dose: 5mg. Maximum supply: 10 tablets. Min age: 12 years … The recommended dose is 5 mg once daily.”
  3. HealthHub (MOH Singapore / Pharmaceutical Society of Singapore) — Levocetirizine medication information leaflet (reviewed 3 Jun 2026) · read 2026-08-27
    what it says
    “belongs to a group of medicines known as antihistamines … Runny nose … Itch in the eyes, nose or skin … You may take this medication with or without food … a newer antihistamine that is less likely to cause drowsiness.”
  4. FDA / openFDA drug label — XYZAL (levocetirizine dihydrochloride) tablets and oral solution, prescribing information (effective 22 Jul 2025) · read 2026-08-27
    what it says
    “5 mg once daily in the evening … Somnolence, fatigue, and asthenia have been reported … Avoid concurrent use of alcohol or other central nervous system depressants … Urinary retention has been reported … New onset pruritus … after discontinuation.”
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Updated 2026-08-29. Every line above traces to a numbered source. Kozen-X is not a medical device and does not give medical advice. It lists what published sources have written down — nothing more. A pair not listed is unrecorded, not cleared. Before you start, stop or re-time anything, talk to your doctor or pharmacist.