Review: could Synthroid cause A-fib (Atrial fibrillation/flutter)?
Summary: A-fib is found among people who take Synthroid, especially for people who are female, 60+ old, also take medication Coumadin, and have Atrial fibrillation/flutter. We study 89,024 people who have side effects while taking Synthroid from FDA and social media. Among them, 1,700 have A-fib. Find out below who they are, when they have A-fib and more.
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Synthroid has active ingredients of levothyroxine sodium. It is often used in hypothyroidism. (latest outcomes from 93,877 Synthroid users)
A-fib (most common type of arrhythmia) has been reported by people with high blood pressure, osteoporosis, rheumatoid arthritis, diabetes, multiple myeloma. (latest reports from 86,721 A-fib patients)
On May, 15, 2015: 89,006 people reported to have side effects when taking Synthroid. Among them, 1,662 people (1.87%) have A-fib.
Time on Synthroid when people have A-fib * :
|< 1 month||1 - 6 months||6 - 12 months||1 - 2 years||2 - 5 years||5 - 10 years||10+ years |
Gender of people who have A-fib when taking Synthroid * :
Age of people who have A-fib when taking Synthroid * :
Severity of A-fib when taking Synthroid ** :
|least||moderate||severe||most severe |
How people recovered from A-fib ** :
|while on the drug||after off the drug||not yet |
Top conditions involved for these people * :
- Atrial fibrillation (203 people, 12.21%)
- Hypothyroidism (157 people, 9.45%)
- Osteoporosis (142 people, 8.54%)
- Hypertension (115 people, 6.92%)
- Thyroid disorder (96 people, 5.78%)
Top co-used drugs for these people * :
- Coumadin (505 people, 30.39%)
- Aspirin (500 people, 30.08%)
- Lasix (496 people, 29.84%)
- Digoxin (375 people, 22.56%)
- Potassium chloride (266 people, 16.00%)
* Approximation only. Some reports may have incomplete information.
** Reports from social media are used.
Comments for this study:
Kathy Kessinger (3 years ago):
I have been on Synthroid or over 8 years. I have been in and out of AFIB for this same time. I have experienced strange heart beats with Synthroid and sleep problems.
I had two long bouts with AFIB and I was taking 225 mg of Synthroid a day. After getting out of the hospital I lowered my does of Synthroid to 150. I did not go into Afib for 6 months.
I then switched to a new drug Armour. I like it but my lab work does not show my T4 is high enough. So we added Synthroid back to my daily meds. I take Armour 120 mg and 25 mg of Synthroid.
I am back in and out of AFib again.
My doctors think it is the T3 in Armour that irritates my AFIB, I think it is Synthroid.
Is there any other way (but Synthroid) to get T4 in your system
Reply the comment
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Comments from related studies:
From this study (8 months ago):
Continue to have intermittent tachycardia/flutter
From this study (9 months ago):
Kevin Peters Ph.d on Mar, 4, 2013:
Sammy, I'm a white 45 male; just wanted to agree on that Klonopin remark. When I was 21 I had my second kidney transplant which was a BAD issue all together, at any rate the hospital did not include my medications taken at home after my surgery. I went thru the worst hallucinations and jerking and seizures you could ever possibly imagine. This went on for almost 3 1/2 weeks before we decided to have me taken OUT of the hospital and relocated before they ended up taking my life. Then the whole staff of paychology including the chief of psychiatry cane in my room to see what they could do, Finallu. During one of my few moments of clarity the C.O.F after blaming me if talking "drugs" prior to my transplant listened to my word of telling him the meds I was on before being admitted. After asking when was the last time I had received my Klonopin and me not knowing, he then reviewed the charts, and didn't see me receiving this med once. He stormed out of the room of about 9 docs and came back in with two Klonopin; for the first time in almost 4 weeks and after three surgeries the first 72 hours I was hospitalized, I was sleeping like a baby, for about 49 hours with NO MORE hallucinations, or seizures or jerking! I finally got out of there without a kidney since that kidney was supposed to go to another man named the same as I in a different city! I do take Xanax and probably always will. The half life on Klonopin is much different hence one if its dangers, Nevwr Ever stop this drug cold! I've been on dialysis 25 1/2 years now and suffered from intense skin cancers, but have fought and done all I can do to live a normal as possible life, working full time except when I'm in yet another surgery, over 32 general anesthetic procedures since 1987. I was the youngest boy-man to ever be on the USA soccer team ready to play in the Korea 1988 Olympics. What a change in life.....
All the Best,
chris on Jun, 4, 2011:
i have been taking clonzepam and trazedone and my speech is a very hoarse voice, I am wondering if if my speech problem is from these drugs's side effects.
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