How To Use Xyzal
Complete Step‑by‑Step Usage Guide, Dosage Instructions & Safety Information
Key Takeaways: How to Use Xyzal Safely
- Standard dose: One 5 mg tablet once daily for adults and children aged 6 years and over.
- Administration: Swallow whole with water, with or without food. Take at the same time each day.
- Renal adjustment: If you have kidney problems, your doctor may prescribe a reduced dose based on your creatinine clearance.
- Contraindications: Do not use if you are allergic to levocetirizine, cetirizine, hydroxyzine, or if you require dialysis for severe kidney disease.
- Pregnancy & breastfeeding: Use only if clearly needed; discuss with your doctor.
Xyzal (levocetirizine) is a once‑daily antihistamine for effective allergy relief. Using it correctly ensures optimal symptom control and minimises the risk of side effects.
Important Medical Advice
Stop taking Xyzal and seek immediate medical help if you experience signs of a serious allergic reaction: swelling of the mouth, tongue, face or throat, difficulty breathing, wheezing, sudden drop in blood pressure, or collapse. Also seek advice if you accidentally take more than the prescribed dose.
How to Take Xyzal: Step‑by‑Step Usage Guide
Follow these simple steps to take Xyzal correctly every time.
- Check your dose: Confirm the number of tablets prescribed – usually one 5 mg tablet daily for adults and children aged 6 years and above.
- Prepare a glass of water: Use still water (not hot) to help you swallow the tablet comfortably.
- Swallow whole: Place the tablet in your mouth and swallow it with a sip of water. Do not chew, crush, or break the tablet – it is designed to release the medicine gradually.
- With or without food: You can take Xyzal on an empty stomach or with a meal – choose whichever suits your routine.
- Consistent timing: Try to take your tablet at the same time each day (e.g., every morning) to maintain steady levels in your blood.
- If you forget a dose: Take the next dose at the normal time. Never double the dose to make up for a forgotten one.
🗒️ Practical tip: If you have difficulty swallowing tablets, you can ask your pharmacist about alternative formulations (though Xyzal is only available as tablets in this strength).
Xyzal Dosage Guide: Recommended Doses by Age and Condition
Dosage depends on age, kidney function, and sometimes liver function. Always follow your doctor’s prescription.
Standard Dosing
| Population | Recommended Dose |
|---|---|
| Adults (≥18 years) | 5 mg once daily |
| Adolescents (12–17 years) | 5 mg once daily |
| Children (6–11 years) | 5 mg once daily |
| Children under 6 years | Not recommended (tablet strength cannot be adjusted) |
Dosage in Renal Impairment
Because levocetirizine is mainly excreted unchanged in urine, the dose must be adjusted in patients with reduced kidney function. Your doctor will calculate your creatinine clearance (CrCl) and prescribe accordingly:
| Creatinine Clearance (mL/min) | Recommended Dose |
|---|---|
| ≥ 50 (normal to mild impairment) | 5 mg once daily |
| 30 – 49 (moderate impairment) | 2.5 mg once daily |
| 15 – 29 (severe impairment) | 2.5 mg every other day |
| < 15 (end‑stage renal disease, on dialysis) | Contraindicated (do not use) |
Dosage in Hepatic Impairment
No dose adjustment is needed in patients with liver impairment alone. However, if both liver and kidney impairment are present, the dose should be adjusted according to renal function.
Elderly Patients
If kidney function is normal, elderly patients can take the standard adult dose. Renal function should be assessed first.
⚠️ Important: The 5 mg tablet is the only strength available; dose reduction for renal impairment is achieved by taking a tablet less frequently (e.g., every other day) or using a different product. Always follow your doctor’s specific instructions.
Who Should Use Xyzal and Who Should Not
Indications (who should use): Xyzal is used to relieve symptoms of:
- Allergic rhinitis (including persistent allergic rhinitis) – sneezing, runny or itchy nose, nasal congestion.
- Chronic idiopathic urticaria (nettle rash) – itching and hives.
Contraindications (who should NOT use):
- Allergy to levocetirizine, cetirizine, hydroxyzine, or any of the tablet excipients (e.g., lactose).
- Severe kidney disease requiring dialysis (end‑stage renal disease).
Warnings and precautions – consult your doctor before use if:
- You have difficulty passing urine (e.g., due to spinal cord injury or enlarged prostate).
- You have epilepsy or are at risk of seizures – Xyzal may aggravate seizures.
- You are scheduled for allergy skin tests – Xyzal should be stopped several days beforehand as it may interfere with results.
🗒️ Note: Xyzal contains lactose. If you have been told you have an intolerance to some sugars, contact your doctor before taking this medicine.
Taking Xyzal with Food, Drink and Alcohol
With food: Xyzal can be taken with or without food. A high‑fat meal may slightly delay absorption, but the overall amount absorbed remains the same.
With alcohol: Caution is advised. Although levocetirizine is minimally sedating, alcohol can increase the risk of drowsiness, dizziness, and reduced alertness. Avoid excessive alcohol consumption while taking Xyzal, especially if you need to drive or operate machinery.
With other drinks: No interactions with non‑alcoholic beverages are known. Water is the best choice for swallowing the tablet.
Special Conditions: Pregnancy, Breastfeeding and Fertility
Pregnancy: There are limited data on the use of levocetirizine in pregnant women. Animal studies do not indicate direct or indirect harmful effects. As a precaution, Xyzal should only be used during pregnancy if clearly needed and after consulting your doctor.
Breastfeeding: Levocetirizine passes into breast milk in small amounts. The effect on a nursing infant is unknown. Discuss with your doctor whether to continue breastfeeding or to use an alternative treatment.
Fertility: No data suggest that levocetirizine affects human fertility.
Xyzal Usage FAQs
Can I take Xyzal every day long‑term?
Yes, for chronic conditions like persistent allergic rhinitis or chronic urticaria, Xyzal can be taken daily under medical supervision. The duration depends on your symptoms and your doctor's advice.
What should I do if I accidentally take too much Xyzal?
In adults, overdose may cause drowsiness. Children may initially become agitated and restless, followed by drowsiness. Contact your doctor or NHS 111 immediately for advice.
Can I take Xyzal with other antihistamines?
Combining antihistamines is generally not recommended unless prescribed by a doctor, as it may increase side effects like drowsiness. Always check with your pharmacist.
How long does Xyzal stay in your system?
The elimination half‑life is about 8–10 hours in healthy adults. It takes roughly 2 days to be completely cleared from the body, but its effects last 24 hours, allowing once‑daily dosing.
Can I drive after taking Xyzal?
In most people, Xyzal does not impair driving. However, some individuals may experience drowsiness. If affected, do not drive or operate machinery until you know how the medicine affects you.
Need Xyzal with Expert Guidance?
If you suffer from allergies and think Xyzal may be right for you, a UK‑registered doctor can assess your symptoms and provide a prescription online.
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Clinical References & Sources
Medical Content Manager
Nabeel is a co‑founder and medical content manager of Chemist Doctor. He works closely with our medical team to ensure the information is accurate and up‑to‑date.
Medical Doctor
Dr. Feroz is a GMC‑registered doctor and a medical reviewer at Chemist Doctor. He oversees acute condition and urgent care guidance.
Medical Director
Usman is a co‑founder and medical director of Chemist Doctor. He leads the organisation's strategic vision, bridging clinical and operational priorities.
Review Date: 12 March 2026
Next Review: 12 September 2026
Published on: 12 March 2026
Last Updated: 12 March 2026