Allergy shots help your body get used to allergens, the things that trigger an allergic reaction. They aren’t a cure, but in time, your symptoms will get better and you may not have symptoms as often.
At first, you’ll go to your doctor once or twice a week for several months. You’ll get the shot in your upper arm. It’ll contain a tiny amount of the thing you’re allergic to — pollen, pet dander, mold, dust mites, or bee venom, for example.
The dose will go up gradually until you get to what’s called a maintenance dose. After that, you’ll usually get a shot every 2-4 weeks for 4-5 months. Then your doctor will gradually increase the time between shots until you’re getting them about once a month for 3-5 years. During that time, your allergy symptoms will get better and may even go away.
A great number of people are affected by allergy. In Europe, there’re 150 million allergy patients. In US, one of four children are with allergy symptoms. Some have life-threating allergy symptoms. A recent clinic trial has proved immunotherapy safe and effective for peanut allergy. Immunotherapy for allergy is getting more attention.