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 88,994 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 93,849 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 86,689 A-fib patients)
On Mar, 16, 2015: 88,994 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 mobile 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 Levothyroxine Sodium, Wellbutrin for a 63-year old woman with Thyroid Disorder, Depression. The patient has Constipation
- A study of side effects of Levothyroxine Sodium for a 54-year old man with Thyroid Disorder. The patient has Numb & Painful Feet Pain. Possible Metatarsalgia, Mortans Nueroma
- A study of side effects of Synthroid for a 52-year old man with Hypothyroidism. The patient has Raynaud's Phenomenon (discoloration of the fingers, toes, and occasionally other areas)
- A study of drug interactions between Lisinopril, Hydrochlorothiazide, Synthroid for a 52-year old woman with High Blood Pressure, Hypothyroidism. The patient has Night Sweats, Hot Flashes, Cough
- A study of drug interactions between Symbicort, Levothyroxine Thyroid for a 55-year old woman with Asthma, Thyroxine Decreased. The patient has Osteoporosis
Recent Synthroid related drug comparison:
- Comparions of Lyrica, Flexeril, Adderall 10, Levothyroxine Sodium, Norco for a 39-year old woman who has Cervical Spinal Stenosis
- Comparions of Meloxicam, Synthroid for a 45-year old woman who has Antiinflammatory Therapy
- Comparions of Dexilant, Aldactone, Lamictal, Viibryd, Synthroid for a 33-year old woman who has Weight Loss
- Comparions of Omeprazole Magnesium, Synthroid for a 40-year old woman who has Hypothyroidism
- Comparions of Levothyroxine Sodium, Omeprazole, Keppra for a 68-year old woman who has Confusion, Barrett's Esophagus
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.
WARNING: Please DO NOT STOP MEDICATIONS without first consulting a physician since doing so could be hazardous to your health.
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