Get Virtual Care
For Businesses
About Us
A member asked:
I'm due to have a thyroid scan in 3 days. yesterday, i took two 25 mg antihistamine pills. will this affect the results?
16 doctors weighed in across 4 answers
No, it should not.: The half life of most antihistamines should be less than 24 hrs and should be out of the system by then. I would check with the radiology center to confirm their policy. I would also avoid any more antihistamines until the time of testing.
Answered 8/3/2012
5.8k views
No: As long as the medicine or even the food you take prior to the study does not have iodine as one of the ingredient, it does not affect the results.
Answered 11/7/2014
5.8k views
No: There are a couple of different agents utilized for thyroid scans, radioiodine and tc99m pertechnetate. A couple of antihistamine pills should not have any effect at all upon your thyroid scan.
Answered 11/6/2012
5.5k views
No it should be fine: Antihistamines do not affect thyroid scans, any radioactive scans or contrast studies.
Answered 11/6/2012
5.5k views
Related Questions
A member asked:
Don't understand how antihistamines work for chronic hives that is due to thyroid issues and not allergies?
4 doctors weighed in across 2 answers
A member asked:
On antihistamine and sinus medications it says to consult your doctor if you have thyroid disease. Why?
A doctor has provided 1 answer
A member asked:
A small neck rash a few days prior to getting a full body rash very quickly. Appears in a.M. Before foods or meds. Clears fast with no antihistamine?
A doctor has provided 1 answer
A member asked:
I have welts on my neck after resting my head on a wool pillow. My upper lip is also swollen. I am taking over-the-counter antihistamines.?
A doctor has provided 1 answer
A member asked:
Rash that is extremely itchy. It has spread to almost everywhere on my body except neck, face and upper back. Cortisone antihistamine not working?
A doctor has provided 1 answer
People also searched for:
I have a non itchy rash all over body, on my arms. Legs, stomach, back chest and neck. I have been prescribed a steroid cream and antihistamines. I've been using these for two weeks but the rash has got worse. What could this be?
Do antihistamines push you hypo or hyper thyroid?
Can chronic autoimmune urticaria go into remission? Will taking levothyroxine for thyroid help stop the hives without taking antihistamines?
I see a lot of antihistamine and sinus medications that says to consult your doctor if you have thyroid disease. What is the reason for this?
Why can not use antihistamines and decongestants in patient with thyroid disease ? What is the machanism of action? What medicine can use to relief ?
Didn't find what you're looking for?
90,000 U.S. doctors in 147 specialties are here to answer your questions or offer you advice, prescriptions, and more.
Ask your questionMore of what we treat
Download HealthTap
Video visit and message your doctor
