HomeAnswersEndocrinologyhypothyroidismMy mom has hypothyroidism and tachyarrythmias. Please help.

Can a patient who has undergone mitral valve replacement take thyroid medications?


The following is an actual conversation between an iCliniq user and a doctor that has been reviewed and published as a Premium Q&A.

Medically reviewed by

iCliniq medical review team

Published At October 3, 2022
Reviewed AtOctober 6, 2023

Patient's Query

Hello doctor,

My mother is 59 years old and has undergone a mitral valve replacement operation 8 months back. She is now on Amiodarone 100 mg once daily and Metoprolol 25 mg twice daily. She was diagnosed with hypothyroidism after taking Amiodarone, so Thyronorm 25 mcg was added, but it was omitted since there were some tachyarrhythmias and SVT. But now, again, TSH is raised to 14.5 mIU/mL. Should she start Thyronorm again? And at what dose should she start it?

Please advise.


Welcome to icliniq.com.

Amiodarone can lead to this kind of thyroid problem. After stopping the drug, the thyroid disturbance can be reversed in some cases. You can start with small doses of 12.5 mcg daily for six weeks and then repeat thyroid tests again. Please consult a specialist and take the medications with their consent.

Patient's Query

Hello doctor,

Amiodarone dose is now reduced to 50 mg once daily from 100 mg. Today after taking 25 mcg Thyronorm for 6 days, TSH is done, and it is 12.5 mIU/mL.

1) What dose of Thyronorn should she take now?

2) Is it only to be taken in the morning?

3) The stomach should be empty for how long before taking Thyronorm?

Please advise.


Welcome back to icliniq.com.

I am sharing certain tips for thyroid medications. It is prescribed for the treatment of Hypothyroidism (underactive thyroid).

1) Take any brand medicine with generic composition mentioned as Levothyroxine.

2) Make sure the dose of Levothyroxine is as per the doctor’s prescription.

3) Please adhere to one brand as much as possible because it is important to have consistency in the amount of thyroid medication from batch to batch of the pills. This may vary if different brands are used interchangeably and affect the stability of thyroid hormone levels in your blood.

4) Take the medicine first thing in the morning with plain water.

5) Do not consume any tea, coffee, milk, food, or breakfast for at least 45 to 60 minutes after consuming the medicine.

6) If the morning time is inconvenient, then 3 hours after the last meal of the day may be considered. However, please be consistent in this routine and pattern of taking the medication more or less the same time daily.

7) Do not take your thyroid medication with calcium or iron or multivitamins or acidity medication. This will reduce the absorption of the thyroid medication, and your body will not get the adequate amount it requires if you are on such medication, then take them at a different time of the day. At least 4 hours apart from the thyroid medication.

8) If you forgot to take your thyroid medication on any one day, then you can always take 2 tablets the next day to catch up.

The dose for her is 12.5 mcg considering her age and heart condition. Do thyroid function test after 6 weeks and review.

Same symptoms don't mean you have the same problem. Consult a doctor now!

Dr. Makwana Tanvi Ghanshyambhai
Dr. Makwana Tanvi Ghanshyambhai


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