Dr. M.J. Bazos MD,
Allergy Shots: Do They Help Your
What are allergy shots?
An allergy shot has a very small amount of the
substance that you are allergic to (called an allergen). Common allergens
include mold and pollen from grasses, ragweed and trees. So, for example, if you
are allergic to grass pollen, a small amount of grass pollen will be put into
How do allergy shots work?
Allergy shots help relieve allergy symptoms by
helping your body fight the allergen. When you get shots of the allergen, your
body starts making antibodies to the allergen. These antibodies help block the
effects of the allergen the next time you have contact with it. Because the
antibodies block the way your body reacts to the allergen, your allergy symptoms
become less severe. After many allergy shots, you might start to get relief from
your allergy symptoms. This relief will last for a long time.
What kind of allergies can be treated with
Allergy shots work well for hay fever (also
called allergic rhinitis), eye allergies, bee-sting allergy and some drug
allergies. In some people, allergy shots can improve asthma symptoms. Usually
people get allergy shots after they have tried other treatments that haven't
worked. Other treatments include avoiding the things that make you have allergy
symptoms and taking medicine, like an antihistamine.
Can everyone get allergy shots?
No. If you have severe asthma or heart problems,
allergy shots may not be good for you. You shouldn't get allergy shots if you
take a beta blocker for heart problems. Children younger than 5 years of age
also shouldn't get allergy shots. Allergy shots shouldn't be started when a
woman is pregnant. But if a woman has been taking allergy shots for some time
and becomes pregnant, she should talk to her doctor. She may be able to continue
taking her allergy shots.
What will happen if my doctor and I choose
allergy shots to treat my allergy?
Your doctor will first do skin testing or blood
testing to try to find out what you are allergic to. Your doctor needs to know
what kind of allergen bothers you because your shots will contain small amounts
of that substance.
How many shots will I have to get?
Quite a few. You will start getting shots 1 or 2
times each week. After about 6 months of weekly shots, your doctor will decide
when you can start maintenance treatment. Maintenance shots are usually given
just once each month, year round. You'll need to get monthly allergy shots for 3
to 5 years. Then you may be able to stop having shots.
Are allergy shots harmful?
Allergy shots are usually safe. But because
allergy shots contain small amounts of the allergen you're allergic to, you
might have an allergic reaction to the shot itself. One kind of allergic
reaction is swelling at the place where the shot is given.
People can also have severe, shock-like
reactions to an allergy shot. This type of reaction is called anaphylaxis and is
very serious. But this problem rarely happens. If you get your shots on schedule
(every week or every month), you're less likely to have this kind of reaction.
In case you have a bad reaction, your doctor
will have you stay at the office for about 20 minutes every time you get your
shot. That way, if you have a reaction to the shot, your doctor can give you
something right away to stop it.
How long after I start taking the allergy
shots before I feel better?
It usually takes 6 months or more of shots
before you start feeling better and notice relief of your allergy symptoms. If
you don't feel better after this time, you should probably talk with your doctor
about another kind of treatment for your allergies.