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Thyroid Cancer, Nodules & Hyperthyroidism (Expert Forum)
From hyper to hypothyroidism
Answered by
Mark Lupo, M.D. - Thyroid Nodules, Thyroid Cancer, hyperthyroidism, hypothyroidism, Thyroid Ultrasound
Thyroid & Endocrine Center of Florida
Sarasota - FL
Questions in the Thyroid forum are answered by Mark Lupo, MD. Topics covered include Goiter, Graves Disease, Hyperthyroid, Parathyroid/Calcium Problems, Thyroid Cancer, Thyroid Nodules/Cysts, Thyroiditis, Thyroid & Pregnancy, Thyroid Stimulating Hormone (TSH), Thyroid Tests, and Thyroid Surgery.
From hyper to hypothyroidism
by anneseno, Jun 28, 2009 02:02PM
Dear Doctor Lupon,
Good day! I have been undergoing treatment for my Graves disease since Oct. last year. I've been put on 30mg methimazole for more than a month now. My latest ft4 result was way below the normal count. I didn't have my tsh checked, though. I asked my endo if I am hypothyroid now, but she is unclear about it. She put me on methimazole (10mg) for now until the second week of August. My concern is, is this a cause for concern? I don't want to be hypo, just wanted my ft4 to be in the normal range. I'm planning on having my tsh checked asap and going to another endo. Is this a wise move or should I wait for August? Won't i be "super" hypothyroid by then? Should I still be on methimazole now, and not another medicine for hypo? thanks for the advice in advance.
Good day! I have been undergoing treatment for my Graves disease since Oct. last year. I've been put on 30mg methimazole for more than a month now. My latest ft4 result was way below the normal count. I didn't have my tsh checked, though. I asked my endo if I am hypothyroid now, but she is unclear about it. She put me on methimazole (10mg) for now until the second week of August. My concern is, is this a cause for concern? I don't want to be hypo, just wanted my ft4 to be in the normal range. I'm planning on having my tsh checked asap and going to another endo. Is this a wise move or should I wait for August? Won't i be "super" hypothyroid by then? Should I still be on methimazole now, and not another medicine for hypo? thanks for the advice in advance.
Doctor's Answer
by Mark Lupo, M.D., Jun 28, 2009 05:32PM
, Jun 28, 2009 05:32PM
Your T4 was likely low due to the relatively high dose of methimazole (30mg); lowering the dose is appropriate. At this point testing TSH, T4 and T3 should be part of the routine labs for Graves follow-up while on methimazole. Usually would retest in 4-6 weeks depending on the case with this type of situation. If you stop the methimazole entirely there is a risk of swinging back to hyperthyroidism.
