Best over-the-counter options for allergies (allergic rhinitis)

Calm the underlying allergic inflammation in the nose, so they help the whole symptom cluster including a blocked/stuffy nose, which oral antihistamines relieve poorly. Used once daily as a preventive, not a rescue spray.

Guideline-preferred first-line monotherapy. The 2017 Joint Task Force synopsis (Annals of Internal Medicine) recommends, for seasonal AR at age 12+, an intranasal corticosteroid alone rather than combined with an oral antihistamine (strong recommendation). Flonase Drug Facts confirms relief of nasal congestion, itchy/runny nose, itchy watery eyes, sneezing; "relief the first day and full effect after several days of regular, once-a-day use."

Caution: Per the Flonase label: not for children under 4; do not use to treat asthma; ask a doctor first if you have/had glaucoma or cataracts; children 4-11 should not use more than 2 months/year (growth-rate signal); after 6 months of daily adult use, ask a doctor. Stop and see a doctor for new vision changes, a constant nasal whistling sound, or severe/frequent nosebleeds. Takes days to weeks to reach full effect — not for instant relief.

Block histamine to relieve itching, sneezing, runny nose, and itchy watery eyes. Taken once daily, either through the season or as-needed on symptom days.

Established, effective, and the non-sedating agents are named by MedlinePlus (cetirizine, desloratadine, fexofenadine, levocetirizine, loratadine) and preferred over older sedating antihistamines like diphenhydramine for daily use. MedlinePlus: loratadine/fexofenadine treat sneezing, runny nose, itchy nose/throat, and red/itchy/watery eyes.

Caution: Do relatively little for a blocked/congested nose (steroid spray wins there). Do not drink alcohol while taking them; even "non-drowsy" ones sedate some people (cetirizine most) — know your response before driving. MedlinePlus flags precautions for glaucoma, enlarged prostate/urinary trouble, heart disease/high BP, epilepsy, thyroid, diabetes, and pregnancy/breastfeeding. For fexofenadine: do not take with orange, grapefruit, or apple juice (reduces absorption).

Target itchy, watery eyes directly. A useful add-on when eyes are the worst part of your symptoms.

Zaditor OTC Drug Facts: "Temporarily relieves itchy eyes due to pollen, ragweed, grass, animal hair and dander." Symptomatic relief for the ocular component, not a cure for allergic disease.

Caution: Adults and children 3+ only: 1 drop in the affected eye(s) twice daily, no more than twice a day. Not for eye infection. Stop and see a doctor for eye pain, vision changes, eye redness, or itching that worsens or lasts more than 72 hours — a red, painful, discharging, or vision-affecting eye needs a clinician.

Physically rinses allergens and mucus from the nose. A low-risk adjunct, safe in pregnancy; will not replace a steroid spray.

The NHS lists salt-water nasal sprays/solutions among pharmacist-recommended options. Genuinely useful as an add-on rather than a standalone treatment for moderate/severe AR.

Caution: If making your own rinse, use previously boiled-then-cooled or distilled water, never straight tap water (rare infection risk). An adjunct only — not a substitute for a steroid spray or antihistamine when symptoms are significant.

Shrink swollen nasal blood vessels for fast unblocking of a stuffy nose. Fast relief, but strictly short-term.

Relieves the congestion symptom only; does not treat allergic disease. MedlinePlus is explicit on the hard limit and the rebound trap.

Caution: MedlinePlus: "Do not use oxymetazoline nasal spray for longer than 3 days" — if symptoms don't improve after 3 days, stop and call your doctor. Overuse causes rebound congestion (symptoms worsen or return). NHS echoes that nasal sprays "should not be used for long periods as this can make your symptoms worse." Not a decongestant for children under 6. Use for a few days at most, not as your season-long plan.

Pseudoephedrine can relieve congestion short-term. Oral phenylephrine is the swallowed ingredient in many open-shelf "-D" products.

Guideline caution (AAAAI Rhinitis 2020): decongestants "limited to short-term use to prevent rebound," and oral decongestants avoided in the first trimester. Critically, FDA (Nov 7, 2024) proposed removing oral phenylephrine because agency review "determined that oral phenylephrine is not effective for this use" — so the swallowed pill does not work as a decongestant (a proposed order on effectiveness, not safety; products remain on shelves for now; does NOT apply to phenylephrine nasal sprays or to pseudoephedrine).

Caution: Oral phenylephrine (swallowed): not effective per FDA — if you want a working oral decongestant, ask the pharmacist for pseudoephedrine behind the counter. Pseudoephedrine can raise blood pressure and cause jitteriness/insomnia — caution with high blood pressure, heart disease, or thyroid problems; avoid in the first trimester of pregnancy.