There’s no single best over-the-counter allergy medicine for everyone, but nasal steroid sprays are now considered the most effective first-line treatment for seasonal and frequent allergies by most allergy specialists. For people who prefer a pill, second-generation antihistamines like loratadine (Claritin), cetirizine (Zyrtec), and fexofenadine (Allegra) are the go-to options. The right choice depends on your specific symptoms, how often they flare up, and whether side effects like drowsiness matter to you.
Nasal Steroid Sprays: The Top Recommendation
If your main complaints are a stuffy or runny nose, sneezing, and sinus pressure, a nasal steroid spray is likely your best bet. These sprays reduce inflammation directly inside your nose, right where the allergic reaction is happening. The most recent international allergy guidelines (ARIA 2024-2025) recommend nasal steroid sprays over nasal antihistamine sprays because they tend to be less expensive, and people are more likely to stick with them and report satisfaction.
Three nasal steroid sprays are widely available over the counter: fluticasone (Flonase), triamcinolone (Nasacort), and budesonide (Rhinocort). All three work similarly. The key thing to know is that they take a few days of consistent use to reach full effect, so they’re not great for quick relief on a random sneezy afternoon. They work best when you use them daily throughout allergy season.
Second-Generation Antihistamines: The Everyday Pills
Oral antihistamines block histamine, the chemical your body releases during an allergic reaction. They’re effective for a wide range of symptoms: runny nose, sneezing, itchy or watery eyes, hives, and swelling. If your allergies affect more than just your nose, a pill may cover more ground than a nasal spray alone.
The three main second-generation antihistamines are loratadine (Claritin), cetirizine (Zyrtec), and fexofenadine (Allegra). All are taken once daily (or twice daily for some fexofenadine doses) and are marketed as non-drowsy. In practice, though, “non-drowsy” is slightly misleading for cetirizine. Clinical trials show cetirizine causes drowsiness in about 14% of users, compared to 6% on a placebo. Loratadine and fexofenadine are less likely to make you sleepy. If you need to stay sharp during the day, fexofenadine is generally the least sedating of the three.
Cetirizine, on the other hand, tends to kick in faster and some people find it more potent for severe symptoms. The tradeoff is that higher chance of drowsiness. Loratadine sits in the middle: low drowsiness risk and solid all-around relief, which is why it’s one of the most popular choices.
Why You Should Skip First-Generation Antihistamines
Diphenhydramine (Benadryl) is the most well-known first-generation antihistamine. It works, but it crosses into your brain much more easily than newer options, which is why it causes significant drowsiness, slowed reaction times, and reduced coordination. You should not drive or operate machinery after taking it. It also wears off in four to six hours, meaning you’d need multiple doses throughout the day.
For occasional nighttime use when allergies are keeping you awake, diphenhydramine can serve double duty. But for daytime allergy management, second-generation antihistamines are safer and more practical.
Matching Medicine to Your Symptoms
Your dominant symptom should guide your choice. Here’s how the options line up:
- Nasal congestion and sinus pressure: Nasal steroid sprays are the strongest option. Oral antihistamines help with sneezing and a runny nose but do less for stuffiness.
- Itchy, watery eyes: Oral antihistamines help, but antihistamine eye drops (like ketotifen, sold as Zaditor or Alaway) deliver faster, more targeted relief.
- Hives and skin reactions: Oral antihistamines are the primary OTC treatment. Cetirizine is a common choice for hives. Corticosteroid creams can help with localized itching and skin irritation.
- Multiple symptoms at once: Many people combine a nasal steroid spray with an oral antihistamine. This is safe and covers both nasal inflammation and the broader histamine-driven symptoms like itchy eyes and sneezing.
Decongestants: Use With Caution
Decongestants like pseudoephedrine (Sudafed) relieve the pressure and stuffiness that come with severe congestion. They work by narrowing blood vessels in your nasal passages. But they come with real limitations. Decongestants can raise your blood pressure and heart rate, and they can interfere with blood pressure medications. If you have high blood pressure or heart disease, avoid them.
Watch out for combination products. Allegra-D, Zyrtec-D, and Claritin-D all contain a decongestant alongside the antihistamine. If you’re reaching for the “-D” version, you’re getting a drug that plain Allegra, Zyrtec, or Claritin doesn’t include. Always check the active ingredient list, because many combination products also contain high sodium levels, which can further affect blood pressure.
Nasal decongestant sprays (like oxymetazoline) should not be used for more than three consecutive days. Longer use causes rebound congestion, where your stuffiness comes back worse than before.
Allergy Medicine for Children
Most second-generation antihistamines and nasal steroid sprays come in pediatric formulations, but age cutoffs vary by product. Cetirizine can be used in liquid form starting at 6 months. Loratadine and fexofenadine are approved from age 2 in syrup form. Fluticasone nasal spray is approved for children 4 and older, while Nasacort and Rhinocort can be used starting at age 2.
Diphenhydramine should not be given to children under 2, and its dosing is weight-based rather than age-based, which makes it trickier to get right. For most kids with seasonal allergies, a once-daily liquid cetirizine or loratadine is the simplest and safest approach. For children under 2, talk with a pediatrician before giving any allergy medication.
How to Choose
If you’re picking one product to start with for typical seasonal allergies (sneezing, runny nose, itchy eyes), a second-generation antihistamine is the simplest entry point. Loratadine or fexofenadine if drowsiness is a concern, cetirizine if you want potentially stronger relief and don’t mind a small chance of sleepiness.
If nasal congestion is your primary problem, add a nasal steroid spray or start with one instead. Give it at least a week of daily use before judging whether it’s working. For eye-specific symptoms, antihistamine eye drops will outperform a pill. And if you find that a single product isn’t cutting it, combining a nasal spray with an oral antihistamine is a well-established approach that covers the widest range of symptoms.