Medical Expertise of Dr. John Simpson, MD
Dr. John Simpson is a board-certified Washington DC allergist who has been providing care to patients for a wide range of allergic and immunologic conditions for over 25 years.
Dr. Simpson served as Past President of the Greater Washington Allergy, Asthma, & Immunology Society, Allergy & Asthma Society of Virginia.
Tips & Wisdom
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 ...
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 ...
Patient Education Resources
Asthma Medication Savings
Click on the image to access medication savings. In most cases,this form must be submitted along with proof of having purchased the medication from the pharmacy. Offers may be time-limited....
Click on the image to access medication savings. In most cases,this form must be submitted along with proof of having purchased the medication from the pharmacy. Offers may be time-limited....
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 ...
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 ...
How long does it take to get allergy relief from allergy shots
Allergy shots, also known as immunotherapy, is a treatment that can help to reduce the severity of allergic reactions by gradually exposing the body to increasing amounts of the allergen over time. Th...
Allergy shots, also known as immunotherapy, is a treatment that can help to reduce the severity of allergic reactions by gradually exposing the body to increasing amounts of the allergen over time. Th...
Is there a treatment for food allergy?
The treatment for food allergies is to strictly avoid the allergenic food, and in case of accidental exposure, the use of rescue medications such as antihistamines and epinephrine (injectable) in the ...
The treatment for food allergies is to strictly avoid the allergenic food, and in case of accidental exposure, the use of rescue medications such as antihistamines and epinephrine (injectable) in the ...
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 ...
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 ...
Education & Training
- Medical School: University of South Carolina School of Medicine
- Pediatric Residency: Children’s Hospital of Alabama
- Allergy Immunology Fellowship: Duke University; Cellular Immuno-Biology at University of Alabama Birmingham
