(HealthDay News) - Allergy shots help sensitize your body to allergens -- things to which you're allergic.

While the shots are safe and effective for most people, not everyone should have them, the American Academy of Family Physicians warns.

Here's the academy's list of people who probably shouldn't have allergy shots:

• People with severe asthma.
• People who have heart problems.
• People who take a beta blocker for a heart condition.
• Children under age 5.
• Pregnant women.