Xyzal (Levocetirizine) Side Effects, Important Info, Before Taking, How to Take

Levocetirizine is an over-the-counter medicinal drug that is used to ward off allergic reactions in the body; Xyzal fights symptoms of seasonal allergies (hay fever), perennial (yearly recurrent) allergies, and skin irritations such as urticaria or hives. This drug usually is a non-sedative (antihistamine) anti-allergy medicine because it enters the brain in a limited harmless amount, but in some people, it is known to induce sedative effects. Levocetirizine is available in pharmacies under the brand name Xyzal and is present in the form of 5mg tablets, and 10ml oral suspension.



Side Effects

The most prevalent side effects include:

  • Sleep induced drowsiness, feeling tired and sleepy.
  • Cold-like symptoms such as cough, sinus pain, and fever; other ENT problems like a bleeding nose, and an ear infection.
  • Dry mouth
  • Vomiting, diarrhea, constipation are unpleasant drawbacks; you may also gain some extra pounds.
  • Xyzal can worsen your allergies as well; immediately stop consuming Xyzal if you have difficulty or painful urination, little or no urination, loss of consciousness and lightheadedness.

Contact your medical advisor if you experience any of these adverse side effects.


Important Information

While using Xyzal in children, do not tamper with the dosage. Children’s bodies are extremely sensitive and absorb the medicine two-fold than an adult’s body. Inform your doctor if you’re using other allergy medications, or if you have any disease such as kidney or liver problems. Call your medical advisor immediately if the medicine worsens your symptoms.


How it works

Our body generates an organic substance called histamine during an allergic reaction; what Xyzal does is that it prevents the body from making such natural substances that lead to symptoms of an allergic reaction. A chain reaction occurs as histamine interacts with the histamine receptors; Xyzal inhibits this chain reaction from ever occurring by blocking these receptors. The cells in the lining of our nose and eyes secrete histamine when they’re confronted with pollen, dust or insect bites thus leading to allergic reactions such as sneezing, itching, watery eyes, and runny nose.


How to take it?

Xyzal is taken orally in the form of a tablet or liquid suspension; the medicine is to be consumed before or after a meal at any time of the time day. It’s a good idea to fix a time for taking the medicine as it’ll be easier for you to remember your next dose. The tablets are taken with a glass of water, and the solution should be taken in a measuring spoon, so the right amount of dose will be consumed. Usually, a syringe is present for drinking accurate amounts of the solution as well.



Since Xyzal induces a sleep-like drowsy state; it is a good idea to stay away from activities that require your motor vigilance as well as cognitive attention. You’re not in the best form to drive a vehicle or operate heavy machinery.

Some medications might react with Xyzal and add to its already tranquilizing effect such as sleeping pills, muscle relaxants, and anti-seizure or anti-depressants. You should let your doctor know if you’re using other drugs such as ritonavir, theophylline, and herbal medications, etc. Alcohol and marijuana worsen the sedating symptoms so prevent their usage.

Neither is there any proper research indicating whether Xyzal has any damaging effect on the fetus; nor is there any evidence depicting that it passes into breast milk. Women in such circumstances should always discuss the major risks and benefits of using this medication to prevent any bad side effects that can prove harmful to the infant’s health.

Patients with gallbladder problems, or urination difficulties, kidney and liver diseases need to inform their doctor about them; 12-year-old kids with kidney dysfunction are not allowed to use Xyzal.