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When you get an allergy shot, your allergist or doctor injects small doses of substances that you are allergic to (allergens) under your skin. This helps your body "get used to" the allergen, which can reduce or prevent symptoms.
At first, you may need to get allergy shots once a week and then once a month. It may take up to a full year of shots before you see any change in your symptoms.
The allergy shot may cause mild problems, such as soreness, redness, warmth, or swelling on the arm where you got the shot. It may also cause itching, hives, or a rash that spreads to other parts of your body.
Follow-up care is a key part of your treatment and safety. Be sure to make and go to all appointments, and call your doctor or nurse advice line (811 in most provinces and territories) if you are having problems. It's also a good idea to know your test results and keep a list of the medicines you take.
Give an epinephrine shot if:
After giving an epinephrine shot call 911, even if you feel better.
Call 911 if:
Call your doctor or nurse advice line now or seek immediate medical care if:
Watch closely for changes in your health, and be sure to contact your doctor or nurse advice line if:
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Current as of: April 20, 2022
Author: Healthwise Staff
Medical Review:Adam Husney MD - Family Medicine & E. Gregory Thompson MD - Internal Medicine & Martin J. Gabica MD - Family Medicine
Care instructions adapted under license by your healthcare professional. If you have questions about a medical condition or this instruction, always ask your healthcare professional. Healthwise, Incorporated disclaims any warranty or liability for your use of this information.
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