Hi, my doc put me on Levothyroxine 75 mcg 1 1/2 months ago and I have had 2 episodes of A-Fib lasting at least 8 hrs. each time since then. Can this drug cause,or contribute to this happening? T.K.
27 Apr 2012
I realize this answer is very, very late but may help someone in future.
Yes, levothyroxine can cause arrhythmias, palpitations. I hope the atrial fibrillaton episodes have resolved for you.
Cardiovascular side effects include: palpitations, tachycardia, arrhythmias, increased pulse and blood pressure, heart failure, angina, myocardial infarction, cardiac arrest.
- Levothyroxine Information for Consumers
- Levothyroxine Information for Healthcare Professionals (includes dosage details)
- Side Effects of Levothyroxine (detailed)
Search for questions
Still looking for answers? Try searching for what you seek or ask your own question.
I'v been on levothyroxine since 1964. I'm 72 and even though my blood work shows that I am getting the right dose, I have all the classic ...
2 answers • 30 Nov 2011
I am fixing to start Levothyroxine 50 mcg after just being diagnosed with hypothyroidism. My number?
... was in the 7's. Will I lose these unwanted 25 pounds that i gained proir to diagnosis? I can't gain anymore!!
2 answers • 10 Apr 2013
doc put me on 25mg of levothyroxine has this happen to anyone else
0 answers • 22 Jun 2013
... months and is constantly upping my dose a little at a time (currently to 175 mcg of levothyroxine) and i'm still at a high # in bloodwork. ...
2 answers • 7 Aug 2013