Several treatments can help allergies, ranging from over-the-counter medications to long-term immunotherapy. The most effective approach depends on how severe your symptoms are and how long they last. For most people, a nasal spray works better than a pill, and combining strategies (medication plus environmental changes) delivers the best relief.
Nasal Sprays Work Better Than Pills
If you’re reaching for an allergy pill every spring, you might be missing the most effective option. The latest international guidelines from allergists found that intranasal medications are more effective than oral ones for controlling allergy symptoms. Among nasal sprays, combination sprays containing both an antihistamine and a steroid (sold as Dymista) and certain steroid-only sprays like fluticasone furoate (Flonase Sensimist) consistently outperformed other treatments.
Steroid nasal sprays work by reducing inflammation directly inside your nose, which addresses congestion, sneezing, and runny nose all at once. They can start working within 12 hours of your first dose, and some people notice improvement in as little as 2 to 4 hours. The catch is that they work best with daily use throughout allergy season rather than as a quick fix on bad days.
If you also deal with itchy, watery eyes alongside nasal symptoms, a combination spray with both an antihistamine and steroid component may be your best bet. Pure steroid sprays handle nasal symptoms well but are less effective for eye-related complaints.
Antihistamines: Choosing the Right One
Antihistamines work by blocking histamine, the chemical your immune system releases during an allergic reaction. They’re best for itching, sneezing, and runny nose, though they do less for congestion. The key distinction is between first-generation and second-generation versions.
First-generation antihistamines like diphenhydramine (Benadryl) cross into the brain, which is why they cause drowsiness, dry mouth, and blurred vision. They also aren’t very selective, meaning they block receptors they shouldn’t, leading to more side effects. Second-generation antihistamines like cetirizine (Zyrtec), loratadine (Claritin), and fexofenadine (Allegra) were designed to stay out of the brain and target only histamine receptors. That makes them far better for daily use.
Not all second-generation options are equally drowsiness-free, though. Cetirizine is roughly 3.5 times more likely to cause drowsiness than loratadine, and fexofenadine is actually less sedating than loratadine. If staying alert matters to you, fexofenadine is the least sedating choice. If you want a bit more potency and don’t mind occasional drowsiness, cetirizine tends to feel stronger for many people.
Decongestant Sprays: A 3-Day Limit
Topical decongestant sprays like oxymetazoline (Afrin) provide fast, dramatic relief from nasal congestion. The problem is that using them for more than 7 to 10 consecutive days can trigger rebound congestion, a condition called rhinitis medicamentosa, where your nose becomes more blocked than it was before you started the spray. Most pharmacists and allergists recommend limiting use to 3 days to stay safely below that threshold. These sprays are useful for short bursts of severe congestion but are not a seasonal allergy strategy.
Allergy Immunotherapy
If your allergies are severe, last for months, or don’t respond well to medications, immunotherapy is the only treatment that can change your immune system’s underlying reaction. It works by exposing you to gradually increasing amounts of your allergen until your body stops overreacting. Two forms are available: allergy shots (given in a doctor’s office) and sublingual tablets or drops (dissolved under the tongue at home).
Both forms are equally effective. Research comparing the two found significant improvement in all symptoms, including sneezing, congestion, shortness of breath, and wheezing, with no meaningful difference in outcomes between shots and tablets. Both also significantly reduced the need for allergy medications. The main difference is time commitment. Allergy shot treatment averaged about 31 months, while sublingual treatment averaged around 19 months, though individual timelines vary widely. Most allergists recommend continuing either form for 3 to 5 years for lasting benefit.
Immunotherapy is particularly worth considering if you have allergic asthma alongside nasal allergies, since it can improve both conditions simultaneously.
Environmental Changes That Reduce Exposure
Medication manages your body’s reaction. Environmental controls reduce how much allergen you encounter in the first place. The two work well together.
A HEPA air purifier captures 99.97% of airborne allergens, including mold spores, pollen, dust mite particles, and pet dander, down to particles as small as 0.3 microns. For it to make a noticeable difference, choose a unit rated for your room size (look for the CADR, or Clean Air Delivery Rate, on the box) and run it in your bedroom with the door closed, especially overnight.
Other practical steps that reduce allergen load:
- Shower before bed to wash pollen out of your hair and off your skin, keeping it off your pillow.
- Keep windows closed during high pollen counts and use air conditioning instead.
- Wash bedding weekly in hot water to kill dust mites.
- Use allergen-proof covers on pillows and mattresses if dust mites are a trigger.
- Remove shoes at the door to avoid tracking pollen through your home.
Food Reactions Linked to Pollen Allergies
If certain raw fruits or vegetables make your mouth tingle or itch, you may have oral allergy syndrome. This happens because proteins in some foods closely resemble pollen proteins, and your immune system gets confused. It’s not a separate food allergy. It’s your pollen allergy misfiring.
The foods that trigger it depend on which pollen you’re allergic to. Birch pollen cross-reacts with the widest range of foods: apples, cherries, peaches, pears, plums, almonds, hazelnuts, carrots, celery, and soy, among others. Ragweed pollen cross-reacts with bananas, melons (cantaloupe, honeydew, watermelon), cucumbers, and zucchini. Grass pollen cross-reacts with tomatoes, oranges, melons, and figs.
Cooking the food usually eliminates the problem because heat breaks down the proteins your immune system is recognizing. So if a raw apple bothers you but applesauce doesn’t, oral allergy syndrome is the likely explanation. Symptoms are almost always limited to mild itching or tingling in the mouth and throat and resolve on their own within minutes.
Biologic Treatments for Severe Allergies
For people whose allergies don’t respond to standard medications or immunotherapy, biologic drugs represent a newer option. These are injectable medications that block specific immune system signals driving the allergic response.
One biologic, omalizumab, targets the antibody (IgE) responsible for triggering allergic reactions. In clinical use, it improved daily nasal symptoms, reduced the need for rescue medications, and lowered the risk of severe reactions in patients also undergoing immunotherapy. Another biologic, dupilumab, blocks two inflammatory signals and has shown significant improvements in sinus and nasal symptom scores for people with year-round allergies. These treatments are typically reserved for severe, treatment-resistant cases and require a prescription from a specialist.