Two new Italian studies report favorable results with under-the-tongue treatments called sublingual immunotherapy (SLIT) that boost immunity to allergy triggers.
The studies were fairly small, but they each spanned two years. The findings may point to new approaches to easing allergies.
In the U.S., allergy shots are the preferred way to treat allergies. They involve injecting gradual amounts of allergens, the stuff that triggers allergies, over several months. But due to the possible severity of side effects, allergy shots aren't recommended for children younger than 5 years.
Under-the-tongue immunotherapy has been widely used in Europe for the last decade, says a news release.
Effective Against Dust Mites
In one study, the under-the-tongue immunotherapy went up against a well-known allergen: dust mites.
Sixty-eight adults who were allergic to dust mites and/or had asthma were followed for two years. They either got standard allergy medications and a placebo, or allergy medications and under-the-tongue immunotherapy treatments.
The under-the-tongue treatment group had a significantly greater drop in nasal obstruction, nasal itching, and cough. They also reported a bigger change in health status. That change was for the better, since those participants didn't make as many extra doctor visits as the placebo takers.
In a second study, Italian researchers followed 126 children aged 3-5 years taking the under-the-tongue immunotherapy treatment. All the kids had respiratory allergies.
The kids took the therapy for at least two years. Their parents noted any side effects, rating them as mild (no intervention or dose adjustment), moderate (medical treatment and/or dose reduction), or severe (life threatening/hospitalization/emergency care).
Nine side effects were reported in seven children. Two cases of oral itching and one of abdominal pain were mild, while six stomach-related side effects were controlled by lowering the dose, say the researchers.
All of the side effects were seen when doses were being increased. The treatment's effectiveness was "excellent" in the majority of the cases, say the University of Genoa's Giovanni Passalacqua, MD, and colleagues.
The findings were reported at the annual meeting of the American Academy of Allergy, Asthma & Immunology, held in San Antonio.
Defeating Dust Mites
The American Lung Association offers these tips to combat dust mites without drugs:
- Cover mattresses and pillows with airtight plastic or vinyl covers.
- Wash bedding in hot water (at least 130 F).
- Remove stuffed animals from the bedroom.
- Remove upholstered furniture and fabric-covered items from the bedroom.
- Use washable curtains and area rugs.
- Do not allow furry or feathered pets in the bedroom.
- Remove carpets, especially in the bedrooms and basement.
- Clean floors with a wet mop.
- Vacuum regularly, using special allergen-controlling bags or machines.
- Clear any clutter that is likely to collect dust.
- Improve ventilation.
- Stop using humidifiers.
- Dehumidify and keep the humidity level below 60%.
- Place filters over heating vents.
- Use high-efficiency air filters on heating ducts.
- Use air cleaners.