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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 88,908 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 mobile support group for people who take Synthroid and have A-fib >>>

Synthroid

Synthroid has active ingredients of levothyroxine sodium. It is often used in hypothyroidism. (latest outcomes from Synthroid 93,746 users)

A-fib

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 A-fib 84,052 patients)

On Dec, 14, 2014: 88,908 people reported to have side effects when taking Synthroid. Among them, 1,662 people (1.87%) have A-fib.

Trend of A-fib in Synthroid reports

Time on Synthroid when people have A-fib * :

< 1 month1 - 6 months6 - 12 months1 - 2 years2 - 5 years5 - 10 years10+ years
A-fib17.95%7.69%12.82%2.56%15.38%10.26%33.33%

Gender of people who have A-fib when taking Synthroid * :

FemaleMale
A-fib74.63%25.37%

Age of people who have A-fib when taking Synthroid * :

0-12-910-1920-2930-3940-4950-5960+
A-fib0.00%0.00%0.00%0.25%1.59%3.44%17.13%77.58%

Severity of A-fib when taking Synthroid ** :

leastmoderateseveremost severe
A-fib0.00%57.14%42.86%0.00%

How people recovered from A-fib ** :

while on the drugafter off the drugnot yet
A-fib22.22%22.22%55.56%

Top conditions involved for these people * :

  1. Atrial fibrillation (203 people, 12.21%)
  2. Hypothyroidism (157 people, 9.45%)
  3. Osteoporosis (142 people, 8.54%)
  4. Hypertension (115 people, 6.92%)
  5. Thyroid disorder (96 people, 5.78%)

Top co-used drugs for these people * :

  1. Coumadin (505 people, 30.39%)
  2. Aspirin (500 people, 30.08%)
  3. Lasix (496 people, 29.84%)
  4. Digoxin (375 people, 22.56%)
  5. 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.

Do you have A-fib while taking Synthroid?

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- support group for people who have A-fib

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