OLLEREG — Tired of Allergy Pills & Nasal Sprays? Try Real Treatment.
Allergy Immunotherapy · Not Another Antihistamine

Stop masking allergy symptoms. Retrain your immune system at home — from $25/month.

Zyrtec, Claritin, Flonase, Nasacort — all symptom blockers. OLLEREG is an at-home allergy spray that works on the root cause. OLLEREG is Oromucosal Immunotherapy (OMIT) — the same immune mechanism as Curex and Wyndly's SLIT drops, delivered as a spray that reaches more of your mouth's immune tissue in one dose. Formulated by Dr. Dat Tran, MD, FAAAAI. 90-day money-back guarantee.

See How It Works ↓
Formulated by a board-certified allergist · Free monthly shipping · 90-day money-back guarantee · No insurance needed
Dr. Dat Tran Developed by Dr. Dat Tran, MD, FAAAAI · Board-Certified Allergist · NIH-Trained · Founder & Medical Director of Innovative Allergy (6+ Houston locations) · ★★★★★ 5.0 · 300+ Google Reviews See the clinic →
The Problem

Symptom suppression isn’t disease modification

Antihistamines block the chemical that causes sneezing and itching. Steroid sprays calm the inflammation in your nose. Decongestants tighten blood vessels to unstick your sinuses. All useful. None of them change how your immune system responds to the allergen in the first place. That’s why pollen count still dictates your month every year, and why stopping the pill means symptoms come back within a day.

Every limitation below is documented in clinical research, FDA labeling, or post-market surveillance.

OTC Antihistamine Pills

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OTC Pill

Zyrtec

cetirizine
Second-generation antihistamine. Blocks H1 receptors to reduce sneezing, itching, and runny nose for up to 24 hours.
Does not treat allergies. Severe withdrawal itching (pruritus) is documented in dermatology literature after long-term daily use — the FDA added a warning in 2024. Sedation reported in up to 14% of users.
OTC Pill

Claritin

loratadine
Non-drowsy antihistamine that blocks histamine for 24 hours. Available over the counter in tablets and liquid.
Does not treat allergies. Tachyphylaxis (drug tolerance) is well-documented — the body adjusts and effectiveness fades. Headache reported in 12% and fatigue in 8% of clinical trial users.
OTC Pill

Allegra

fexofenadine
Non-drowsy antihistamine marketed as the least sedating option. Blocks histamine for 12–24 hours.
Does not treat allergies. Headache (up to 10%), back pain, nausea, and dizziness reported in trials. Allergies return the moment the dose wears off. Fruit juice blocks absorption.

Nasal Sprays

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Nasal Spray

Flonase

OTC nasal steroid spray
OTC nasal corticosteroid. Reduces inflammation in the nasal passages to ease congestion, runny nose, and post-nasal drip.
Does not treat allergies. Nosebleeds reported in up to 1 in 5 users. FDA labeling notes growth suppression in children with long-term use, plus rare nasal septal perforation. Daily steroid exposure for life.
Nasal Spray

Nasacort

OTC nasal steroid spray
OTC nasal steroid alternative to Flonase. Reduces nasal inflammation with once-daily dosing.
Does not treat allergies. FDA post-market reports include vision changes, elevated eye pressure, and cataracts with long-term use. Nasal dryness, burning, and nosebleeds are common.
Nasal Spray

Astepro

OTC antihistamine nasal spray
Antihistamine nasal spray (now OTC). Works in about 30 minutes for sneezing, runny nose, and nasal itching.
Does not treat allergies. Clinical trials show bitter taste in 19.7% of users and somnolence in 11.5% — not the "non-sedating" some assume. Nosebleeds and headache also reported.
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Still reaching for Benadryl?
A landmark 2015 JAMA Internal Medicine study (Gray et al.) linked long-term use of first-generation sedating antihistamines to a significantly higher risk of dementia in adults 65+. Even the American Academy of Allergy, Asthma & Immunology recommends against routine use.
The Difference

Masking symptoms vs. retraining the immune system

Allergy Pills & Nasal Sprays

  • ✗ Block symptoms temporarily
  • ✗ Must use every single day, forever
  • ✗ Stop working when you stop using them
  • ✗ Drowsiness, nosebleeds, rebound congestion
  • ✗ Daily steroid or antihistamine exposure
  • ✗ Decades of recurring cost
vs

OLLEREG Immunotherapy

  • ✓ Retrains your immune system
  • ✓ Two sprays, once a day
  • ✓ Builds lasting tolerance over time
  • ✓ No drowsiness or brain fog
  • ✓ ~80% see meaningful improvement
  • ✓ $25/month — cancel anytime
Using OLLEREG allergy spray

Two Sprays. Once a Day. That's It.

Spray under your tongue, wait 5 minutes, and go about your day. No pills to remember throughout the day. No drowsiness. No clinic visits.

See How OLLEREG Compares

RecommendedOLLEREG OTC Pills
Zyrtec / Claritin		 Nasal Sprays
Flonase / Astepro		 Allergy Shots
Treats root cause ✓ ✗ ✗ ✓
Builds lasting tolerance ✓ ✗ ✗ ✓
No drowsiness ✓ Varies Varies ✓
No clinic visits ✓ ✓ ✓ ✗
No needles ✓ ✓ ✓ ✗
Doctor-developed ✓ ✗ ✗ Varies
Typical annual cost From ~$300/yr $200–360/yr $150–400/yr $1,500–4,000/yr
Recommended

OLLEREG

Allergy immunotherapy spray
  • Treats root cause✓
  • Builds lasting tolerance✓
  • No drowsiness✓
  • No clinic visits✓
  • No needles✓
  • Doctor-developed✓
Typical annual costFrom ~$300/yr

OTC Pills

Zyrtec / Claritin
  • Treats root cause✗
  • Builds lasting tolerance✗
  • No drowsinessVaries
  • No clinic visits✓
  • No needles✓
  • Doctor-developed✗
Typical annual cost$200–360/yr

Nasal Sprays

Flonase / Astepro
  • Treats root cause✗
  • Builds lasting tolerance✗
  • No drowsinessVaries
  • No clinic visits✓
  • No needles✓
  • Doctor-developed✗
Typical annual cost$150–400/yr

Allergy Shots

Traditional immunotherapy
  • Treats root cause✓
  • Builds lasting tolerance✓
  • No drowsiness✓
  • No clinic visits✗
  • No needles✗
  • Doctor-developedVaries
Typical annual cost$1,500–4,000/yr

Pills and sprays cost less per year — but you pay every year, forever. OLLEREG builds tolerance that lasts.

Find your spray

Which Allergies Are You Medicating?

Answer 4 quick questions and we'll match you with the right OLLEREG spray to replace your daily pills or nasal sprays.

Question 1 of 4

What triggers your allergies the most?

What are you currently taking for allergies?

What frustrates you most about your current approach?

How long have you been dealing with allergies?

Compare: Wyndly charges $55+/mo. Curex is $100/mo without insurance. OLLEREG starts at $25/mo — same science, lower price. See full comparison →

As Seen On Fox 26
Fox 26 Houston
~80%
of patients see meaningful relief
30+
years of OIT science worldwide

They Ditched the Pills. Here's What Happened.

Real OLLEREG customers who made the switch from antihistamines.

Woman enjoying outdoors after switching from antihistamines
★★★★★
"I took Zyrtec every single day for 8 years. Within a few months of OLLEREG I realized I hadn't needed a pill in weeks."
Before: Daily Zyrtec, still sneezing through spring. Drowsy every afternoon.
— Verified OLLEREG Customer
Man outdoors after switching from Claritin to OLLEREG
★★★★★
"Claritin stopped working for me years ago. My doctor said try shots but I couldn't do weekly visits. This was the answer."
Before: Rotated between Claritin, Allegra, and Flonase. Nothing lasted.
— Verified OLLEREG Customer

Frequently Asked Questions

Zyrtec, Claritin, Flonase, Nasacort, Astepro — every one of them is a symptom blocker. Antihistamines block histamine. Steroid sprays reduce inflammation. All of them stop working when you stop using them because none of them change the underlying immune response. OLLEREG uses Oromucosal Immunotherapy (OMIT) — it gradually retrains your immune system to stop overreacting to allergens in the first place. Over time, many patients need less and less of their daily pill or spray because the root problem is actually improving.
Yes. Most patients continue their current pill or nasal spray when they start OLLEREG and gradually reduce it as their tolerance builds. There's no need to quit cold turkey — you can transition at your own pace. Many patients report needing their daily pill or spray less and less over the first 3–6 months.
Antihistamines are cheap because they're simple symptom blockers — you take them forever. OLLEREG is doctor-formulated immunotherapy that actually changes your immune response. Think of it as the difference between renting and buying: antihistamines are a subscription to symptom relief. OLLEREG is an investment in actually getting better. Plus, at $25/month with a 90-day money-back guarantee, there's very little risk in trying.
Immunotherapy is not instant like popping a Zyrtec. Most patients begin noticing improvement within 3–6 months of consistent daily use. The immune system needs time to retrain. That's why we offer a 90-day money-back guarantee — we want you to give it a real chance. The results build over time, and about 80% of patients see meaningful long-term relief.
OLLEREG includes a quick health review with our board-certified allergist, Dr. Dat Tran, MD, FAAAAI, before your first shipment — everything handled in one streamlined intake, no separate doctor visit required. No insurance needed, and you may be able to use HSA or FSA funds — check with your plan administrator.
OLLEREG comes with a 90-day money-back guarantee. Use it consistently for 90 days, and if you're not satisfied, we'll refund you in full. We offer this because immunotherapy takes time to work — and we're confident in the science behind it.

30 More Years of Pills & Sprays? Or Actually Fix This?

Two sprays a day. $25 a month. Real immunotherapy that treats the cause — not the symptoms. No rebound, no daily dependency, no lifetime subscription.

Find Your Spray — From $25/month

Learn more about OLLEREG →

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Find Your Spray — From $25/month