Yes, cetirizine is available over the counter in the United States without a prescription. You can find it at pharmacies, grocery stores, and online retailers under the brand name Zyrtec or as a generic. It has been sold OTC since 2007 and is one of the most widely used allergy medications in the country.
Brand Names and Generic Options
The most recognizable brand is Zyrtec, but cetirizine is also sold under store-brand and generic labels that cost significantly less. Common alternatives include Aller-Tec, Alleroff, and Wal-Zyr. If you need a version that also includes a nasal decongestant (pseudoephedrine), look for Zyrtec-D or its generic equivalents like Wal Zyr-D and Cetiri-D. The decongestant versions are still available without a prescription, but they’re typically kept behind the pharmacy counter and require showing ID at purchase.
Forms You Can Buy
Cetirizine comes in several formats to suit different preferences and age groups: standard tablets, capsules, chewable tablets, orally disintegrating tablets that dissolve on the tongue without water, and a liquid syrup. The syrup and chewable tablets are especially useful for young children who can’t swallow pills. All of these are available OTC in the same strengths.
Standard Doses by Age
Adults and children 12 and older typically take 5 to 10 mg once daily, depending on how severe their symptoms are. Most people start with 10 mg. Children 6 to 11 take 5 to 10 mg once daily, usually in syrup or chewable form. For kids 2 to 5, the dose drops to 2.5 mg once daily, and children as young as 6 months can take 2.5 mg of the syrup once a day.
If you have reduced kidney function, a lower dose of 5 mg per day is generally recommended. The medication is cleared through the kidneys, so it can build up in the body when kidney filtration is impaired.
What It Treats and How Fast It Works
Cetirizine is FDA-approved for seasonal and year-round allergic rhinitis (hay fever symptoms like sneezing, runny nose, and itchy eyes) and for hives. It works by blocking histamine, the chemical your immune system releases during an allergic reaction.
A single 10 mg dose starts working within 20 minutes for about half of people, and within one hour for 95%. The effects last a full 24 hours, so one dose per day is enough. That quick onset makes it a practical choice when you need relief and forgot to take it in the morning.
Drowsiness Compared to Other Options
Cetirizine is a second-generation antihistamine, which means it causes far less drowsiness than older options like diphenhydramine (Benadryl). Fewer than 1 in 140 people report drowsiness with newer antihistamines as a group. That said, cetirizine is the most sedating of the second-generation options. A large general-practice study found it was roughly 3.5 times more likely to cause drowsiness than loratadine (Claritin). If drowsiness is a concern for you, loratadine or fexofenadine (Allegra) may be better choices, though cetirizine’s faster onset is a tradeoff some people prefer.
The sedation tends to be mild and often diminishes after the first few days of regular use. Taking your dose at bedtime rather than in the morning can help you avoid noticing it during the day.
Use During Pregnancy and Breastfeeding
International guidelines list cetirizine as an acceptable antihistamine during breastfeeding, particularly at small, occasional doses. In a study of three women taking 10 mg daily while exclusively breastfeeding infants 5 to 6 months old, no adverse effects were observed in their babies. However, larger or more prolonged doses may cause drowsiness in the infant. A separate study of 31 women taking cetirizine daily found that about one-third reported a perceived decrease in milk supply, especially when used alongside a decongestant like pseudoephedrine. If you’re breastfeeding, sticking to the lowest effective dose and avoiding combination products with decongestants is a reasonable approach.
For pregnancy, cetirizine is generally considered one of the preferred antihistamines, though the evidence base is smaller. Your provider can help weigh the benefits against any individual risk factors.
What to Watch for When Buying
Generic cetirizine contains the same active ingredient as Zyrtec at the same strength, so paying more for the brand name doesn’t get you a different medication. Check the “Drug Facts” label on any product to confirm the only active ingredient is cetirizine hydrochloride if you want a pure antihistamine without a decongestant. Products labeled with a “D” (like Zyrtec-D) contain pseudoephedrine, which raises blood pressure and isn’t suitable for everyone.
Cetirizine is safe for long-term daily use during allergy season or year-round for persistent allergies. Unlike nasal decongestant sprays, it doesn’t cause rebound congestion with extended use.