Question : Why does allergy medicine say consult a doctor before use if you have thyroid disease?
I’ve been looking at allergy medications and most of them say consult a doctor before use if you have thyroid disease. I left a message with my doctor, but what would be the side-effects of someone taking allergy medicine if they had thyroid disease?
allergy medicine

Best answer:

Answer by Diana
Taking an antihistamine if you have a thyroid condition could lead to tachycardia (abnormally high heart rate). Please don’t take them without consulting your doctor.