You may want to avoid exercise or doing anything strenuous for 2 hours before and after your appointment. That’s because exercise boosts blood flow to the tissues and may cause the allergens to spread throughout your body faster. It’s not likely to cause a serious problem, but it’s best to be safe.

Tell your doctor about any other medicines or herbs and supplements you take. Some medications interfere with the treatment or raise the risk of side effects. You may need to stop allergy shots if you take these medications.

If you’re pregnant or planning to get pregnant, ask your doctor whether you should continue to get allergy shots.