ImportantThis page is general information, not a prescription. Don't start, stop, or change a medicine without talking to your provider or pharmacist.
Overview
It's closely related to cetirizine and can cause some drowsiness.
What it's used for
- Seasonal and indoor allergies
- Hives
How to take it
- Take it once in the evening, with or without food.
- Follow the label for age.
Your dose depends on your health and other medicines. Always follow your prescription label, and ask your pharmacist if anything is unclear.
Side effects
Common side effects
- Sleepiness
- Dry mouth
- Tiredness
- Sore throat
Call 911Swelling of the face, lips, or throat, hives, or trouble breathing
Call your provider todayTrouble peeing
Warnings
- Not for people with severe kidney disease.
- Some people get itching after stopping long daily use.
Other medicines, foods, and alcohol
- Alcohol and sedating medicines add to drowsiness.
Tell your provider and pharmacist about every medicine, vitamin, and supplement you take.
Pregnancy and breastfeeding
Ask your provider.
Missed doses, overdose, and storage
If you miss a dose
Take it as soon as you remember, unless it's almost time for your next dose. Then skip the missed dose. Don't take two doses at once.
If someone takes too much
Call Poison Control at 1-800-222-1222 or get help online at poison.org. Call 911 if the person collapses, has a seizure, has trouble breathing, or can't be woken.
Storing it
Store at room temperature, away from heat and moisture (not in the bathroom), and out of reach of children and pets.
Conditions it's used for
Sources
- DailyMed: FDA drug label for Levocetirizine (U.S. National Library of Medicine)
- MedlinePlus: Drugs, herbs, and supplements
- FDA: Drugs@FDA
Last updated 2026-11-13.