Dr. John Simpson, MD

Oral Food Challenge - Diagnosing Food Allergies
Challenge testing is when an allergen is given to a patient in small doses under medical supervision to see if there is an allergic reaction. This test is commonly done to diagnose food and drug allergies. This test is the most accurate way to tell if a patient is allergic to a certain food or drug. A challenge test may also be considered to see if a patient has outgrown an allergy. What is an Oral Food Challenge? An oral food challenge (OFC) is a type of challenge test where a patient is ...

Does my Epipen® really expire?
EpiPens do have an expiration date, and it is important to replace them before they expire. The expiration date can be found on the packaging and the device itself.An expired EpiPen® may not work ...

I have asthma. Should I have an asthma action plan?
It's important for those with asthma to have an asthma action plan.An asthma action plan is a written document that outlines specific steps for managing asthma symptoms and preventing asthma attac...

Is there a treatment for peanut allergy?
The treatment for peanut allergy is strict avoidance of peanuts and products that may contain peanuts. In case of accidental exposure, the use of rescue medications such as antihistamines and epinephr...

Is there really a hypoallergenic dog species?
The term "hypoallergenic" is often used to describe dogs that are less likely to cause an allergic reaction in people. However, there is no such thing as a completely hypoallergenic dog, as ...

What types of pollen trigger allergies?
Pollen is a fine powder that is released by trees, grasses, and weeds during the spring, summer, and fall. When these pollens come into contact with the eyes, nose, and lungs of people who are sensiti...