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Dr. John Overholt

Allergy and Immunology
Franklin, TN
27 years experience male

Locations

Office

Franklin, TN

Address

400 Sugartree Ln, Suite 100, Franklin, TN
Directions

Insurances accepted

Blue Cross Blue Shield Of Tennessee

Aetna Life Insurance Company

Amerigroup

Cigna

UnitedHealthcare

About

Bio

I'm a third-generation physician practicing in Nashville and Middle Tennessee. I did Internal Medicine at UVa and then Pulmonary Medicine and Allergy at Vanderbilt. I've been in private practice for 10 years and I'm past president of the Tennessee Society of Asthma, Allergy, and Immunology. When I'm not working, I'm usually schlepping my kids to soccer or lacrosse or riding my bike. I recently completed my 10 year maintenance of certification

Specialties
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

Doctor Q&A

173 Answers
73 Agrees
The number of answers this doctor has agreed with.
A 35-year-old member asked:
Dr. John Overholt
Allergy and Immunology 27 years experience
Maybe: Infections that are unusual, too frequent, or that are difficult to treat might signal immune deficiency. A couple of simple blood tests are usually ... Read More
A 48-year-old member asked:
Dr. John Overholt
Allergy and Immunology 27 years experience
Doubtful: When allergies develop, it is usually to large protein molecules. Whisky is mostly alcohol and water- both very small molecules. Alcohol can cause n... Read More
A 38-year-old member asked:
Dr. John Overholt
Allergy and Immunology 27 years experience
I'm sure Drew meant: Not MAO inhibitors, nor do they contain them.
A 31-year-old member asked:
Dr. John Overholt
Allergy and Immunology 27 years experience
Yes: If you have Epinephrine at home..... In all seriousness, it depends on the trigger. Avoidance is the mainstay for food or drug induced anaphylaxis. ... Read More
A 29-year-old member asked:
Dr. John Overholt
Allergy and Immunology 27 years experience
Asthma attacks?: Pulmonary eosinophilia can be seen in a number of diseases, but is most commonly seen in asthma, where levels of eosinophils and their byproducts corr... Read More
A 34-year-old member asked:
Dr. John Overholt
Allergy and Immunology 27 years experience
Oral Allergy Syndrom: If your reactions are local- oral and throat itching and burning- the problem is oral allergy syndrome, which is a cross reaction with pollens. It ca... Read More
A 33-year-old member asked:
Dr. John Overholt
Allergy and Immunology 27 years experience
Pressure change: The middle ear is a closed space, except for a "pop-off valve" called the eustachian tube. The maneuvers you describe can force the eustachian tube o... Read More
A 29-year-old member asked:
Dr. John Overholt
Allergy and Immunology 27 years experience
No: There are no protocols to desensitize someone to foods via injections. There are oral desensitization protocols, but at present they are only suitabl... Read More
A 42-year-old member asked:
Dr. John Overholt
Allergy and Immunology 27 years experience
Very rare: There are case reports, but it is a very uncommon allergy.
A 29-year-old member asked:
Dr. John Overholt
Allergy and Immunology 27 years experience
Immunoglobulin: Gammar-p is a brand name for a preparation of immunoglobulin, primarily igg. It is indicated for igg replacement in persons with low or absent igg le... Read More
A 41-year-old member asked:
Dr. John Overholt
Allergy and Immunology 27 years experience
Several ways: The preferred manner of testing depends on the history and the type of reaction. Skin testing can be performed, but there are no validated commercial... Read More
A 44-year-old member asked:
Dr. John Overholt
Allergy and Immunology 27 years experience
Yes : There are good, validated tests to penicillin. There are no commercially available tests to sulfonamides, but skin testing +/- oral challenge is stil... Read More
A 45-year-old member asked:
Dr. John Overholt
Allergy and Immunology 27 years experience
Lots of tips: The short answer is avoidance, medications, and allergy shots, typically in that order. Not sure i can give a complete answer in 400 characters or le... Read More
A 31-year-old member asked:
Dr. John Overholt
Allergy and Immunology 27 years experience
Other ideas: Try an otc sinus rinse product. If that's not working, the next step is a prescription nasal steroid spray. If that's not working, you should see an... Read More
A 38-year-old member asked:
Dr. John Overholt
Allergy and Immunology 27 years experience
Probably, but: It is still pregnancy class c. Budesonide, as found in Pulmicort is class b.
A 38-year-old member asked:
Dr. John Overholt
Allergy and Immunology 27 years experience
Yes: At one time, it was known as "clindamycin colitis".
A 46-year-old member asked:
Dr. John Overholt
Allergy and Immunology 27 years experience
HEPA: Hepa filter means high efficiency particulate air filter. This is just a government designation that a filter will remove a certain number of particl... Read More
A 48-year-old member asked:
Dr. John Overholt
Allergy and Immunology 27 years experience
What foods: Without knowing what foods you are allergic to and how you were diagnosed, it is difficult to answer this question properly.
A 46-year-old member asked:
Dr. John Overholt
Allergy and Immunology 27 years experience
Not necessarily: Long periods of hot dry weather lead to high ambient ozone levels. Ozone is a respiratory irritant and can precipitate asthma symptoms in susceptible... Read More
A 30-year-old member asked:
Dr. John Overholt
Allergy and Immunology 27 years experience
Virus v disease: Aids is the manifestation of advanced HIV infection. The HIV virus destroys certain immune cells, cd4+ t-cells, and when those t-cell numbers get too ... Read More
A 32-year-old member asked:
Dr. John Overholt
Allergy and Immunology 27 years experience
Lots: Allergists commonly skin test for inhalant allergies (pollens, dust mites, animals, molds), foods, stinging insect allergy, penicillin allergy, and l... Read More
A 43-year-old member asked:
Dr. John Overholt
Allergy and Immunology 27 years experience
YIKES: Nasal nebulized antibiotics have been tried, but there's no good evidence that they're any better than oral antibiotics. Crushing and snorting antibi... Read More
A 32-year-old member asked:
Dr. John Overholt
Allergy and Immunology 27 years experience
Unusual: Cromolyn is generally very well tolerated.
A 40-year-old member asked:
Dr. John Overholt
Allergy and Immunology 27 years experience
Should be fine: Hydroxyzine is sedating, so you'll probably get sleepy. Don't take more than you've been prescribed without talking to your doctor first.
A 34-year-old member asked:
Dr. John Overholt
Allergy and Immunology 27 years experience
Yes: Typical allergy medications like antihistamines, nasal steroid sprays, and decongestants are fine to take with anti-inflammatory medications like ibup... Read More
A 43-year-old member asked:
Dr. John Overholt
Allergy and Immunology 27 years experience
Yes: Clarinex is desloratidine, the major metabolite of loratidine or claritin (loratadine). So, when you take loratidine, the body turns much of it into ... Read More
A 31-year-old member asked:
Dr. John Overholt
Allergy and Immunology 27 years experience
Yes: If you mean otc supplements, herbs and the like claiming to "boost immunity", then yes they are unlikely to be effective.
A 31-year-old member asked:
Dr. John Overholt
Allergy and Immunology 27 years experience
Coccidiomycosis: "valley fever" is a fungal infection due to coccidioides immitis. It is seen in the southwestern U.S. And elsewhere. It typically resembles a flu-li... Read More
A 36-year-old member asked:
Dr. John Overholt
Allergy and Immunology 27 years experience
You could, but: They do exactly the same thing so taking both is just like taking a double dose of one. Instead, you should try something from a different medication... Read More
A 46-year-old member asked:
Dr. John Overholt
Allergy and Immunology 27 years experience
Good and bad: Good: it is very effective and lasts all day. It is cheap. Bad: it makes 10-15% of people sleepy it is usually the first antihistamine i reco... Read More
A 45-year-old member asked:
Dr. John Overholt
Allergy and Immunology 27 years experience
Can be either: Allergic reactions can cause angioedema. This is seen not infrequently in severe food allergies to peanut, tree nuts, and shellfish. The class of an... Read More
A 38-year-old member asked:
Dr. John Overholt
Allergy and Immunology 27 years experience
Common: As food allergies go, milk is one of the more common offenders. More common in kids and there's a good chance they'll outgrow it.
A 46-year-old member asked:
Dr. John Overholt
Allergy and Immunology 27 years experience
Not fast acting: Advair contains two medications. The steroid, fluticasone, can take several days to show maximum benefit. The bronchodilator, salmeterol, takes a fe... Read More
A 29-year-old member asked:
Dr. John Overholt
Allergy and Immunology 27 years experience
Not Much: Zicam allergy relief nasal spray contains several unproven homeopathic substances which supposedly get stronger the more they are diluted. You're jus... Read More
A 32-year-old member asked:
Dr. John Overholt
Allergy and Immunology 27 years experience
No: Xla is a b-cell disease in which there are no functional b-cells and, hence no antibodies. These folks are chiefly susceptible to bacterial sinopulmo... Read More
A 46-year-old member asked:
Dr. John Overholt
Allergy and Immunology 27 years experience
Yes: They work well together.
A 43-year-old member asked:
Dr. John Overholt
Allergy and Immunology 27 years experience
Any time: Generally, immunotherapy is indicated for folks with allergies that are poorly controlled by conventional medications or for those with significant co... Read More
A 40-year-old member asked:
Dr. John Overholt
Allergy and Immunology 27 years experience
Both antihistamines: Zyrtec and Claritin (loratadine) are both antihistamines. Imho, zyrtec works better but has a small chance of making you sleepy.
A 29-year-old member asked:
Dr. John Overholt
Allergy and Immunology 27 years experience
Imaging: I'd see a neurologist, but you're going to need a ct or MRI of the head.
A 39-year-old member asked:
Dr. John Overholt
Allergy and Immunology 27 years experience
Sure: Prednisone is generally reserved for severe allergy symptoms or asthma attacks. For nasal allergies, instead of Benadryl (diphenhydramine) i'd recomm... Read More
A 35-year-old member asked:
Dr. John Overholt
Allergy and Immunology 27 years experience
Be careful: Vistaril (hydroxyzine) is very sedating and combining it with alcohol will potentiate the sedating effects.
A 48-year-old member asked:
Dr. John Overholt
Allergy and Immunology 27 years experience
Yes: Allergic people are not born with allergies. Rather, they are born with the tendency to develop them. Allergies are then developed through exposure ... Read More
A 37-year-old member asked:
Dr. John Overholt
Allergy and Immunology 27 years experience
YMMV: It depends on your degree of sensitivity. If you have had anaphylaxis to milk products, then avoid even small amounts. Otherwise you might get by wi... Read More
A 38-year-old member asked:
Dr. John Overholt
Allergy and Immunology 27 years experience
Be careful: Egg substitutes like egg beaters are made from eggs and will contain egg proteins that could precipitate an allergic reaction. There are vegan egg su... Read More
A 48-year-old member asked:
Dr. John Overholt
Allergy and Immunology 27 years experience
10mg a day: Is the usual dose but studies have used doses as high as 900mg a day for a week without any adverse consequences. Post marketing surveillance has see... Read More
A 40-year-old member asked:
Dr. John Overholt
Allergy and Immunology 27 years experience
Unlikely: In 2004 the institute of medicine (iom) found there was sufficient evidence to link indoor exposure to mold with upper respiratory tract symptoms, cou... Read More
A 31-year-old member asked:
Dr. John Overholt
Allergy and Immunology 27 years experience
Unlikely: Anaphylaxis is usually caused by stinging insects, foods, or medications. Spring allergens in the U.S. Are usually tree pollens. A systemic reaction ... Read More
A 48-year-old member asked:
Dr. John Overholt
Allergy and Immunology 27 years experience
No: The virus would not be found on hair.
A 32-year-old member asked:
Dr. John Overholt
Allergy and Immunology 27 years experience
Not in the U.S.: In canada and elsewhere, yes.
A 44-year-old member asked:
Dr. John Overholt
Allergy and Immunology 27 years experience
The dose makes: The poison. Reasonable doses as prescribed by a physician are safe. When used improperly, there may be an increased risk for prostate cancer in men.... Read More

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Testimonials
Recommendations and Thank you notes are endorsements given from patients or other doctors.

2
Recommendations
303
Thank you notes
HealthTap member
Mar 30, 2015
Dr. Overholt is an amazing doctor! #nationaldoctorsday2015 #virtualflower1
HealthTap member
Mar 31, 2015
Dr. Overholt is an amazing doctor! #nationaldoctorsday2015 #virtualflower1
HealthTap member
Response to my question came from related responses of questions previously asked. I feel that "my" question was not answered.
HealthTap member
Thank you but i was wondering if i can give Zyrtec in the morning and Allegra at night
HealthTap member
Thank you, your answer was very helpful! I was not sure it was blockage or resistance

Education & Training

Medical/Graduate school

University of Tennessee College of Medicine, TN
Graduated 1995MD

Awards

Fellows award, SEAAI; past president TSAAI
Top Allergist and Immunologist, First Place, Tennessee - Spring
2017
HealthTap Founding Doctor

Affiliations

Allergy and Asthma Associates of Middle Tennessee
90,000 U.S. doctors in 147 specialties are here to answer your questions, provide medical advice, write prescriptions, and more.
Answer emailed
in 24 hours or less