Allergy shots, also called immunotherapy, are a treatment used to help reduce allergy symptoms such as:
Sneezing.
Itchy, watery eyes.
A runny, stuffy nose.
Asthma.
Allergy shots may benefit people who are allergic to:
Grass, tree, plant, and weed pollens.
Insect venom.
Animal dander.
House dust mites.
Molds.
Allergy shots are not given for food allergies.
How do allergy shots work?
When you get an allergy shot, the substance you are allergic to (allergen) is injected under your skin. At first only a little bit of the substance is injected, but over time the amount is slowly increased. This allows the body builds up a tolerance (immunity) to the allergen and create proteins called antibodies that block its effects.
Allergy shots begin to work shortly after you begin treatment, but allergy symptoms may not improve for 3–12 months. …show more content…
How often and for how long will I need shots?
Most people start by getting shots 1–3 times a week for 3–6 months, and then continue to get maintenance shots about once a month for life. Some people can stop getting shots after 3–5 years.
You may need to stop getting allergy shots if:
The shots do not work for you.
You start taking certain medicines that interact with the shots.
You miss many appointments for your shots.
What are the side effects of allergy shots?
The most common side effects of allergy shots are mild redness and swelling at the injection site. This often goes away on its own. Less common side effects include:
Flushing.
Tingling.
Itchy eyes, nose, or throat.
Sneezing.
Runny nose or nasal congestion.
Itchy, red, swollen areas of skin (hives) all over the
body.
Trouble breathing.
Coughing.
Wheezing.
Swelling of the throat.
Tightness in the chest.
Nausea.
Dizziness.
After getting an allergy shot, you will need to stay at the clinic for up to 30 minutes so that a health care provider can be sure you do not have serious side effects.