Together, you and your doctor will determine which type of allergy testing is best for you. Some of the pros and cons of each type are:
Skin Testing (Scratch/Intradermal)
Pros
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- Immediate results
- Sensitive
- Inexpensive
Cons
- Multiple skin pricks/punctures
- Some medications can affect results
- Rare risk of possible life-threatening reaction (anaphylactic shock)
- Can't be used for people who have widespread skin problems or are taking certain medications
Blood Testing (RAST)
Pros
- No risk of anaphylactic reaction
- Good for children and people who have skin problems or who are taking some medications
- One needle stick to draw blood
Cons
- Delayed results
- More expensive
- Requires needle stick
Challenge Tests
Pros
- Immediate results
- Can be used when food or drugs that are possible allergens are needed
Cons
- Risk of possible life-threatening reaction (anaphylactic shock)
- Expensive