I have Graves disease dxd Dec 2007, and have been on PTU since then and until about 2 weeks ago was feeling great. My last blood test was in Feb & all levels were normal. Then, about 2 weeks ago, I got the flu & took some over the counter cold & flu medicine. After taking it, I actually read the box & it said not to take if you have thyroid disease. Ever since then, I feel as if some of my symptoms are coming back (rapid heartbeat, anxiety, insomnia). I called my Endo & he is going to do another blood test, but do you think the cold/flu medicine can cause some kind of flare up in my Hyperthyroid symptoms?
cold/flu meds have decongestants (like pseudofed) that can increase blood pressure and heart rate -- they usually clear the system in a couple days. It's worth testing thyroid again to be certain though.
I had a cold in early January and had gone to the pharmacy and asked what I could take and they told me to take an allergy med due (antihistimine) to the fact that cold meds alter your labs. I never did ask my MD but I am assuming the pharmacist wouldn't state otherwise.
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