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 89,006 people who have side effects while taking Synthroid from FDA and social media. Among them, 1,662 have A-fib. Find out below who they are, when they have A-fib and more.
You are not alone: join a support group for people who take Synthroid and have A-fib >>>
Synthroid has active ingredients of levothyroxine sodium. It is often used in hypothyroidism. (latest outcomes from 93,858 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 Apr, 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
How to use the study: print a copy of the study and bring it to your health teams to ensure drug risks and benefits are fully discussed and understood.
Get connected: join our support group of synthroid and a-fib on
Do you have A-fib while taking Synthroid?
You are not alone! Join a support group on :
- support group for people who take Synthroid and have A-fib
- support group for people who take Synthroid
- support group for people who have A-fib
Drugs in real world that are associated with:
Could your condition cause:
- A study of drug interactions between Clonidine, Levothyroxine Sodium, Simvastatin, Losartan Potassium, Metoprolol Succinate, Furosemide, Prednisone, Neoral for a 71-year old man with High Blood Pressure, Thyroxine Decreased, High Blood Cholesterol, Duretic, Anti Rejection, Suppress Immune System.
- A study of drug interactions between Synthroid, Topamax, Lithium Carbonate for a 36-year old man with Hashimoto's Thyroiditis, Bipolar Ii Disorder.
- A study of drug interactions between Levothyroxine Sodium, Boniva for a 54-year old woman with Low Thyroid, Osteopenia. The patient has Dizzy, Chest Pain
- A study of drug interactions between Vitamin D, Multivitamin, Hydroxychloroquine Sulfate, Losartan, Metoprolol Succinate, Synthroid, Atorvastatin Calcium for a 72-year old woman with Supplement, Sjogren's Syndrome, Hypertension, Cardiac Flutter, Hypothyroidism, Ldl/hdl Ratio Increased. The patient has Laboratory Test Abnormal
- A study of drug interactions between Metoprolol Succinate, Synthroid, Zoloft for a 58-year old woman with High Blood Pressure, Hypothyroidism, Chronic Depression. The patient has Depressed Mood
Recent Synthroid related drug comparison:
NOTE: The study is based on active ingredients and brand name. Other drugs that have the same active ingredients (e.g. generic drugs) are NOT considered.
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