Dr. Douglas Johnston
Allergy and Immunology
Charlotte, NC
22 years experience male
Locations
Asthma & Allergy Specialists
Charlotte, NC
About
Bio
Dr. Johnston is an Allergist/Immunologist in private practice and an assistant professor of Internal Medicine / Allergy /Immunology at the Edward Via College of Osteopathic Medicine. Dr. Johnston received his D.O. from New York College of Osteopathic Medicine in Old Westbury, New York. He completed his residency in Internal Medicine at Winthrop University Hospital in Mineola, New York, and received fellowship training in Allergy and Immunology at the University of Alabama at Birmingham. He serves on several professional committees which aim to improve the quality of care in the field of Allergy and Immunology. Dr. Johnston has been published in several journals and has an interest in Hereditary Angioedema and treatment strategies for Eosinophilic Esophagitis.
SpecialtiesDoctors may have more than one area of specialty interest. Board certification in a specialty area means the doctor has completed formal training and has practice experience in that specialty, and has passed the certification examination from the corresponding accredited medical specialty board.
Doctors may have more than one area of specialty interest. Board certification in a specialty area means the doctor has completed formal training and has practice experience in that specialty, and has passed the certification examination from the corresponding accredited medical specialty board.
Allergy and Immunology
Languages spoken
English
Doctor Q&A
34 Answers
17 Agrees
The number of answers this doctor has agreed with.
A 35-year-old female asked:
Dr. Douglas Johnstonanswered
Allergy and Immunology 22 years experience
ER Now: Rapid breathing and retractions can be a sign of respiratory distress. These muscles can get tired and difficulty breathing can get worse. Stay calm a... Read More
Created for people with ongoing healthcare needs but benefits everyone.
4.9k viewsReviewed >2 years ago
A 39-year-old member asked:
Dr. Douglas Johnstonanswered
Allergy and Immunology 22 years experience
Treatments for EoE: Treatment options for eosinophilic esophagitis currently include topical corticosteroids and/or food elimination diet. An allergist with experience in... Read More
Created for people with ongoing healthcare needs but benefits everyone.
4.9k viewsReviewed >2 years ago
A 44-year-old member asked:
Dr. Douglas Johnstonanswered
Allergy and Immunology 22 years experience
See an allergist: No all angioedema is allergic and some forms do not response to epinephrine, steroids or antihistamines. I would recommend evaluation by an allergist ... Read More
Created for people with ongoing healthcare needs but benefits everyone.
4.9k viewsReviewed >2 years ago
A 45-year-old member asked:
Dr. Douglas Johnstonanswered
Allergy and Immunology 22 years experience
Swelling: Angioedema is a medical term for swelling of the deep layers of the skin. Angioedema can be due to a number of different reasons and is not alway due ... Read More
Created for people with ongoing healthcare needs but benefits everyone.
4.9k viewsAnswered >2 years ago
A 38-year-old member asked:
Dr. Douglas Johnstonanswered
Allergy and Immunology 22 years experience
Treatment of EoE: Typical treatment options include topical steroids, food elimination diets or a combination of both. Talk to your doctors to determine the best treatm... Read More
Created for people with ongoing healthcare needs but benefits everyone.
4.9k viewsReviewed >2 years ago
A 38-year-old member asked:
Dr. Douglas Johnstonanswered
Allergy and Immunology 22 years experience
Depends on cause: The risk of severe laryngeal swelling or throat swelling depends on the cause of your hives and swelling. This risk can be high in food/ drug allergy ... Read More
Created for people with ongoing healthcare needs but benefits everyone.
4.9k viewsAnswered >2 years ago
A 36-year-old member asked:
Dr. Douglas Johnstonanswered
Allergy and Immunology 22 years experience
No: Phenylephrine is an oral decongestant.
Created for people with ongoing healthcare needs but benefits everyone.
4.9k viewsReviewed >2 years ago
A 40-year-old female asked:
Dr. Douglas Johnstonanswered
Allergy and Immunology 22 years experience
Treatments for EoE: The current treatment options for eosinophilic esophagitis include topical steroids (fluticasone inhaler swallowed) and food elimination diet. An alle... Read More
Created for people with ongoing healthcare needs but benefits everyone.
4.9k viewsReviewed >2 years ago
A 37-year-old member asked:
Dr. Douglas Johnstonanswered
Allergy and Immunology 22 years experience
Can vary: Ige mediated food allergy symptoms may include hives, swelling, vomiting, abdominal pain, difficulty breathing, and even drop in blood pressure. Sympt... Read More
Created for people with ongoing healthcare needs but benefits everyone.
4.9k viewsReviewed >2 years ago
A 31-year-old member asked:
Dr. Douglas Johnstonanswered
Allergy and Immunology 22 years experience
Similar: Nasonex and Flonase are both nasal steroids but the steroid in Nasonex is mometasone and the steroid in Flonase is fluticasone. Both are effective for... Read More
Created for people with ongoing healthcare needs but benefits everyone.
4.9k viewsReviewed >2 years agoMerged
A 30-year-old member asked:
Dr. Douglas Johnstonanswered
Allergy and Immunology 22 years experience
EoE: Eosinophilic esophagitis or eoe is an allergic inflammatory disease of the esophagus typically caused by food proteins. Symptoms can include vomiting,... Read More
Created for people with ongoing healthcare needs but benefits everyone.
4.7k viewsReviewed >2 years ago
A member asked:
Dr. Douglas Johnstonanswered
Allergy and Immunology 22 years experience
Could be : Hae or hereditary angioedema is a genetic swelling disease due to deficiency or dysfuntion in a protein called c1 inhibitor. Typical symptoms include ... Read More
Created for people with ongoing healthcare needs but benefits everyone.
4.9k viewsReviewed >2 years ago
A 39-year-old member asked:
Dr. Douglas Johnstonanswered
Allergy and Immunology 22 years experience
EoE: Eosinophilic esophagitis or eoe is an allergic inflammatory disease of the esophagus typically caused by food proteins. Symptoms can include vomiting,... Read More
Created for people with ongoing healthcare needs but benefits everyone.
4.9k viewsReviewed >2 years ago
A 19-year-old member asked:
Dr. Douglas Johnstonanswered
Allergy and Immunology 22 years experience
Yes: Not all swelling (angioedema) is due to allergy. While there are many causes of swelling, one is a type of swelling disorder called cold urticaria, ... Read More
Created for people with ongoing healthcare needs but benefits everyone.
6.1k viewsReviewed >2 years ago
A 32-year-old member asked:
Dr. Douglas Johnstonanswered
Allergy and Immunology 22 years experience
Learning more : A recent publication in the journal of allergy and clinical immunology described a subset of patients with eosinophilic esophagitis who have connectiv... Read More
Created for people with ongoing healthcare needs but benefits everyone.
4.9k viewsReviewed >2 years ago
A 35-year-old member asked:
Dr. Douglas Johnstonanswered
Allergy and Immunology 22 years experience
Depends on the cause: This depends on the cause. Most cases do not , however, food and drug allergy has potential to cause severe reactions. An accurate diagnosis is import... Read More
Created for people with ongoing healthcare needs but benefits everyone.
4.9k viewsAnswered >2 years ago
A 40-year-old member asked:
Dr. Douglas Johnstonanswered
Allergy and Immunology 22 years experience
Can vary: Symptoms of symptoms of anaphylaxis after insect sting can vary depending on the person and the degree sensitivity to insect venom. Severe reactions ... Read More
Created for people with ongoing healthcare needs but benefits everyone.
4.9k viewsReviewed >2 years ago
A 29-year-old female asked:
Dr. Douglas Johnstonanswered
Allergy and Immunology 22 years experience
Your doctor can help: The development of pressure or fullness in the ears may be due to fluid production from sinus inflammation. This can occur in both allergic rhinitis (... Read More
Created for people with ongoing healthcare needs but benefits everyone.
4.9k viewsAnswered >2 years ago
A 45-year-old member asked:
Dr. Douglas Johnstonanswered
Allergy and Immunology 22 years experience
Sedation risk: There may be potential for increased sedation with Hydroxyzine and xanax (alprazolam). Hydroxyzine alone can be sedating.
Created for people with ongoing healthcare needs but benefits everyone.
4.9k viewsReviewed >2 years ago
A 29-year-old male asked:
Dr. Douglas Johnstonanswered
Allergy and Immunology 22 years experience
Updated definition: According updated 2011 consensus recommendations, eosinophilic esophagitis is a “chronic, immune/antigen-mediated esophageal disease characterized cli... Read More
Created for people with ongoing healthcare needs but benefits everyone.
4.9k viewsReviewed >2 years ago
A male asked:
Dr. Douglas Johnstonanswered
Allergy and Immunology 22 years experience
Need fresh food: Often times the food skin prick test is positive, however fresh food may be needed.
Created for people with ongoing healthcare needs but benefits everyone.
4.9k viewsReviewed >2 years ago
A 40-year-old member asked:
Dr. Douglas Johnstonanswered
Allergy and Immunology 22 years experience
Start with your doc: I would take pics of swelling and discuss them with your primary doctor first to help narrow down potential causes.
Created for people with ongoing healthcare needs but benefits everyone.
6k viewsReviewed >2 years ago
A 40-year-old member asked:
Dr. Douglas Johnstonanswered
Allergy and Immunology 22 years experience
Can vary: Attack duration varies from person to person but typically lasts 3-5 days.
Created for people with ongoing healthcare needs but benefits everyone.
4.9k viewsReviewed >2 years ago
A 20-year-old female asked:
Dr. Douglas Johnstonanswered
Allergy and Immunology 22 years experience
Nope: Skin tests, rast tests or serum specific ige alone can not diagnose food allergy. There is a very high false positive rate with rast testing, especial... Read More
Created for people with ongoing healthcare needs but benefits everyone.
4.9k viewsReviewed >2 years ago
A 36-year-old member asked:
Dr. Douglas Johnstonanswered
Allergy and Immunology 22 years experience
Eval may help: There are many causes of skin swelling and not all are genetic. One condition called hereditary angioedema is a genetic type of swelling that often r... Read More
Created for people with ongoing healthcare needs but benefits everyone.
6k viewsReviewed >2 years ago
A 48-year-old member asked:
Dr. Douglas Johnstonanswered
Allergy and Immunology 22 years experience
Not likely : This would not be likely. Food allergy is typically caused by food proteins and coconut oil would have significantly less coconut protein than coconut... Read More
Created for people with ongoing healthcare needs but benefits everyone.
3k viewsAnswered >2 years ago
A 47-year-old member asked:
Dr. Douglas Johnstonanswered
Allergy and Immunology 22 years experience
Treatment of EoE: Current treatments for eosinophilic esophagitis include topical steroids and food elimination diet. An allergist with experience in treating eoe can h... Read More
Created for people with ongoing healthcare needs but benefits everyone.
4.9k viewsReviewed >2 years ago
A 48-year-old member asked:
Dr. Douglas Johnstonanswered
Allergy and Immunology 22 years experience
No: While anaphylaxis can occur due to food and drug allergy, it does not occur in every case. It is important to discuss the cause of hives and swelling ... Read More
Created for people with ongoing healthcare needs but benefits everyone.
4.9k viewsAnswered >2 years ago
A 42-year-old member asked:
Dr. Douglas Johnstonanswered
Allergy and Immunology 22 years experience
Nasal congestion?: I would suggest talking to your doctor if otc antihistamines are not helpful. I will mention that antihistamines tend to be more helpful for itching a... Read More
Created for people with ongoing healthcare needs but benefits everyone.
4.9k viewsAnswered >2 years ago
A 49-year-old member asked:
Dr. Douglas Johnstonanswered
Allergy and Immunology 22 years experience
Little is known: There have been a subset of patients with hae type iii (now called hae with normal complement) who have a mutation in a blood factor called factor xii... Read More
Created for people with ongoing healthcare needs but benefits everyone.
4.9k viewsAnswered >2 years ago
A 34-year-old member asked:
Dr. Douglas Johnstonanswered
Allergy and Immunology 22 years experience
Allergy treatments: Typical treatment for allergic rhinitis include avoidance of allergic triggers, oral antihistamines, leukotriene modifying drugs, nasal steroids, nasa... Read More
Created for people with ongoing healthcare needs but benefits everyone.
4.9k viewsReviewed >2 years ago
A 46-year-old member asked:
Dr. Douglas Johnstonanswered
Allergy and Immunology 22 years experience
Often with 2 hours : Hives or urticaria caused by exposure to allergens (such as food) typically occur rapidly, often minutes but can occur up to 2 hours later. It is impo... Read More
Created for people with ongoing healthcare needs but benefits everyone.
4.9k viewsAnswered >2 years ago
A 39-year-old member asked:
Dr. Douglas Johnstonanswered
Allergy and Immunology 22 years experience
Yes: Antihistamines and nasal steroids are often used together for the treatment of allergic rhinitis.
Created for people with ongoing healthcare needs but benefits everyone.
4.9k viewsReviewed >2 years ago
A 35-year-old female asked:
Dr. Douglas Johnstonanswered
Allergy and Immunology 22 years experience
Cold urticaria: Yes it is possible to develop hives and swelling to the cold. This is not acually an "allergy" but rather an abnormal response by the body that can o... Read More
Created for people with ongoing healthcare needs but benefits everyone.
4.9k viewsReviewed >2 years ago
TestimonialsRecommendations and Thank you notes are endorsements given from patients or other doctors.
Recommendations and Thank you notes are endorsements given from patients or other doctors.
2
Recommendations
93
Thank you notes
HealthTap member
Mar 30, 2015
Dr. Johnston is an amazing doctor! #nationaldoctorsday2015 #virtualflower1
HealthTap member
Mar 31, 2015
Dr. Johnston is an amazing doctor! #nationaldoctorsday2015 #virtualflower1
HealthTap member
Thank you, your answer was very helpful!
HealthTap member
Thank you, your answer was very helpful!
HealthTap member
Thank you, your answer was very helpful!
Education & Training
Medical/Graduate school
New York Institute of Technology New York College of Osteopathic Medicine, NY
Graduated 2001MD
Awards
Top Allergist and Immunologist , First Place, North Carolina - Summer
2013
Publications
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