John Shea, MD

02/25/2026

What Are Allergy Drops?
They are drops of offending allergen, food or airborne, placed under the tongue, creating allergen tolerance.

How Do They Work?
Receptors under the tongue called Langerhans Giant Cells take up and partially digest protein molecules in the allergy drop solution and present them to immune system T cells. These T-regulatory cells induce ALLERgen TOLerance. They do this by training the immune system by a process called “down regulation”. Each time an allergy drop is placed under the tongue, the immune system becomes more tolerant. This results in significant symptom reduction and less need for medications and procedures.

Safe, Painless, Effective, Low Cost, High Compliance
Allergy drops are administered at home, saving time and travel expense. The out of pocket cost is low, especially considering less need for medications and doctor trips. Allergy drop therapy has been safely administered in the U.S. and in Europe. A literature review by Southwestern Medical School in Dallas revealed no severe life-threatening reactions in 15 consecutive years of allergy drop therapy worldwide. Self limiting adverse reactions have been reported in less than 3 in 1000 doses. Studies have shown that the development of asthma is many times less likely to develop in children that receive allergy drop therapy. Because allergy drops are painless, they are an ideal allergy solution for children and infants. Long-term compliance is as high as 95%.

There are, several factors that make allergy drops a viable alternative to shots, as recommended by the World Health Organization and the Cochrane Study Group out of London.

How is testing done?
Sublingual testing is done by simply placing drops of suspected food proteins under the tongue several times a day, and observing symptom changes.

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02/18/2026

About Allertol Allergy Drops

Allertol is a twice patented allergy drop solution that can provide T-cell immunotherapy and lasting relief of night time nasal blockage, restless sleep, fatigue, recurrent sinus infections, cough, wheezing, throat clearing, reflux, rashes and skin itching, headache / migraine, IBS diarrhea, GERD, the ear fullness / tinnitus / dizziness of Menieres and Eosinophilic Esophagitis (EoE).

Allergy drops can also used to treat common airborne allergies.

Allertol contains pure water, glycerin and FDA approved allergy extracts.

Allertol can save money with less need for antihistamines, steroid sprays, decongestants, nasal strips and doctor trips.

Allertol may be a simple solution for your stubborn chronic symptoms.

A visit (in office or Telemed) is made once or twice a year to evaluate progress.

Provide lasting relief of your chronic problems with Allertol sublingual immunotherapy – not just the symptoms.

Send a message to learn more

02/04/2026

Allertol: The Allergy Drop Solution for delayed food allergy is a slow immune reaction to common food or drink, especially favorites. Symptoms produced usually occur hours after eating / drinking. Repeated sneezing, coughing and throat clearing are common.

Delayed immune reactions to food will be described here as delayed food allergies. The reaction usually occurs several hours after eating or drinking, but can begin to occur before the end of a meal. Watch repeated sneezing in a restaurant for example, or frequent throat clearing / cough.

Any food protein ingested can be a culprit; dairy products are common. Food or drink addictions are commonly associated with delayed food allergies.

Unlike acute food allergy, which can result in severe sudden reactions including anaphylaxis requiring emergency treatment, the delayed food allergy results in chronic problems. And unlike the immediate reaction, which is caused by an antibody called IgE, the delayed immune response is cell mediated, particularly the T cell. Immediate, severe food allergies can be tested reliably with Immunoglobulin E ( IgE) blood test, but there is not a blood test for delayed food allergies. Studies of T cells are ongoing, and someday there may well be a blood test available that uncovers the food proteins responsible for delayed food allergies.

Delayed food allergies are often “hidden” in the diet, and seldom suspected, as symptoms often occur several hours later. The patient will often state “I can’t be allergic to that food; I love it and have it all the time!” The delayed food allergy patient may be allergic to several foods with different and confusing reactions with different delays.

The immediate food allergy patient becomes acutely aware of which food must be avoided, and experiences the same set of severe sudden symptoms. An example is severe asthma within minutes of eating peanut, tree nut, fish or seafood. The Allertol Method is not used for these life-threatening food allergies.

Like allergy shots, allergy drops use FDA approved antigen extracts to create an allergy drop solution for each patient. In the United States, an increasing number of patients have received benefit from allergy drops. In much of Europe, allergy drop therapy is used more often than shots. Like a series of allergy shots, allergy drops are used to gradually build allergen tolerance over several years.

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01/14/2026

Airborne Allergies

What Are Airborne Allergies?

Allertol, The Allergy Drop Solution Airborne allergies, also called inhalant allergies, are typical seasonal allergies or “hay fever” that many suffer in the spring when grass and tree pollens are prevalent, and in the fall when weeds such as ragweed pollen is in the air, and in the middle of winter in Texas where mountain cedar is prevalent. Usual symptoms consist of nasal blockage, itchy runny nose, and eye itching. Seasonal asthma is less common. These seasonal allergies change with the direction of the wind, usually decrease when indoors and when traveling to another area. Some airborne allergy symptoms can be perennial, especially from animal dander such as cat, from house dust mites in bedding, and from mold, especially if there has been a water leak or high humidity levels in a house or a building such as at work or school.

The immune system makes an antibody called Immunoglobulin E (IgE) that attaches to the airborne allergens. This antibody can be detected with a high level of accuracy in a blood test. Skin testing is also a reliable test, especially with a technique called Serial Endpoint Titration (SET).

Medications such as nasal steroid sprays, antihistamines and oral steroids are often effective, at least temporarily.

Send a message to learn more

12/31/2025

Allertol is a twice patented allergy drop solution that can provide T-cell immunotherapy and lasting relief of night time nasal blockage, restless sleep, fatigue, recurrent sinus infections, cough, wheezing, throat clearing, reflux, rashes and skin itching, headache / migraine, IBS diarrhea, GERD, the ear fullness / tinnitus / dizziness of Menieres and Eosinophilic Esophagitis (EoE).

Allergy drops can also used to treat common airborne allergies.

Allertol contains pure water, glycerin and FDA approved allergy extracts.

Allertol can save money with less need for antihistamines, steroid sprays, decongestants, nasal strips and doctor trips.

Allertol may be a simple solution for your stubborn chronic symptoms.
A visit (in office or Telemed) is made once or twice a year to evaluate progress.

Provide lasting relief of your chronic problems with Allertol sublingual immunotherapy – not just the symptoms.

Send a message to learn more

10/04/2023

Looking for front office employee for fast paced ENT office.

01/11/2023

The 'gold standard' for evaluation and treatment of delayed food allergies has been elimination diets.
Diets are difficult, time consuming, and ineffective. They do not alter the immune response to foods.
The Allertol Method is simple, safe, and effective for testing and treating delayed food allergies.

Allertol can save money with less need for decongestants and nasal sprays, nasal strips and doctor trips, and reduces the need for sinus surgeries.

Multiple body systems can be affected by delayed food allergies producing multiple symptoms including nighttime nasal blockage with snoring, restless sleep and fatigue. Chronic throat clearing and nagging cough are common. Shortness of breath sensations and a lump in the throat sensations can cause anxiety. Eczema, rashes and skin itching can occur.

Migraine and common headache are common, especially menstrual migraine.

Meniere's symptoms of intermittent ear fullness, noise sensitivity, tinnitus and dizziness have been studied, documenting relief using the Allertol Method.

Delayed food allergies can be responsible for GERD, abdominal pain and bloating, IBS-Diarrhea, Eosinophilic Esophagitis (EoE) with trouble swallowing and itching of the middle of the upper back.

08/31/2022

WHAT?
Allertol is a proven and patented revolutionary solution for T cell mediated delayed food allergies.

Allertol sublingual drops have FDA approved food allergy extracts, glycerin and water.

HOW?
The Allertol Method utilizes sublingual food drop tests to identify guilty food proteins. These food allergens are then placed in an allergy drop solution for sublingual immunotherapy. This provides long term relief of multiple system symptoms.

WHY?
The 'gold standard' for evaluation and treatment of delayed food allergies has been elimination diets.
Diets are difficult, time consuming, and ineffective. They do not alter the immune response to foods.
The Allertol Method is simple, safe, and effective for testing and treating delayed food allergies.

Allertol can save money with less need for decongestants and nasal sprays, nasal strips and doctor trips, and reduces the need for sinus surgeries.

Multiple body systems can be affected by delayed food allergies producing multiple symptoms including nighttime nasal blockage with snoring, restless sleep and fatigue. Chronic throat clearing and nagging cough are common. Shortness of breath sensations and a lump in the throat sensations can cause anxiety. Eczema, rashes and skin itching can occur.

Migraine and common headache are common, especially menstrual migraine.

Meniere's symptoms of intermittent ear fullness, noise sensitivity, tinnitus and dizziness have been studied, documenting relief using the Allertol Method.

Delayed food allergies can be responsible for GERD, abdominal pain and bloating, IBS-Diarrhea, Eosinophilic Esophagitis (EoE) with trouble swallowing and itching of the middle of the upper back

08/03/2022

Airborne allergies, also called inhalant allergies, are typical seasonal allergies or “hayfever” that many suffer from March through June when tree and grass pollens are prevalent, and in the fall when weeds including ragweed are in the air, and November through February in Texas when mountain cedar is prevalent. Usual symptoms consist of nasal blockage, itchy runny nose, and eye itching. Seasonal asthma is less common. These seasonal allergies change with the direction of the wind, usually decrease when indoors and when traveling to another area. Some airborne allergy symptoms can be perennial, from animal dander such as cat, from house dust mites in bedding, and from mold.

The immune system makes an antibody called Immunoglobulin E (IgE), which reacts with airborne allergens. This antibody can be detected with a high level of accuracy in a blood test. Skin testing may not be a reliable test.

Medications such as nasal steroid sprays, antihistamines and oral steroids are temporarily effective, When these medications are needed perennially, all days, all seasons, all year..... the problem is most likely a T cell mediated delayed food allergy, for which allergy shots or airborne allergy drops, as well as medications, are of little help.

07/06/2022

Allertol is a proven and patented revolutionary solution for T cell mediated delayed food allergies.

Allertol sublingual drops have FDA approved food allergy extracts, glycerin and water.

The Allertol Method utilizes sublingual food drop tests to identify guilty food proteins. These food allergens are then placed in an allergy drop solution for sublingual immunotherapy. This provides long term relief of multiple system symptoms.

The 'gold standard' for evaluation and treatment of delayed food allergies has been elimination diets.
Diets are difficult, time consuming, and ineffective. They do not alter the immune response to foods.
The Allertol Method is simple, safe, and effective for testing and treating delayed food allergies.

Allertol can save money with less need for decongestants and nasal sprays, nasal strips and doctor trips, and reduces the need for sinus surgeries.

Multiple body systems can be affected by delayed food allergies producing multiple symptoms including nighttime nasal blockage with snoring, restless sleep and fatigue. Chronic throat clearing and nagging cough are common. Shortness of breath sensations and a lump in the throat sensations can cause anxiety. Eczema, rashes and skin itching can occur.

Migraine and common headache are common, especially menstrual migraine.

Meniere's symptoms of intermittent ear fullness, noise sensitivity, tinnitus and dizziness have been studied, documenting relief using the Allertol Method.

Delayed food allergies can be responsible for GERD, abdominal pain and bloating, IBS-Diarrhea, Eosinophilic Esophagitis (EoE) with trouble swallowing and itching of the middle of the upper back.