Since increasing my levothyroxine to 75 mcg 4 days ( I take 50 mcg 3 days) palpitations seam better but not all gone.
My pcp suggested I get my heart checked( EKG was normal)
Do u think I should get my heart checked? Do u think palpitations may be due to thyroid ? Thanks
Probably due to under-medication - palpitations are a hypo symptom. And, you are on such a silly little dose. When did you last have your thyroid labs done? What were the results and ranges? 
My recent blood test were in normal range, I posted them . Thanks
T3 free 2.6 ( 2.0-4.4)
This one? It may be in-range - just about - but it's not nearly high enough. You are under-medicated, so not surprising you're having hypo symptoms.
Thanks. My endo stopped my T3 dose after having palpitations. He says restarting T3 means, my palpitations will be worst! Do u think taking small dose of T3 will help?Thanks
Were you taking T3 because you're a poor converter?
How much T3 were you taking?
Did he increase the levo when he stopped the T3?
Are those last results with or without T3?
I don't think your endo knows what he's talking about. Just taking T3 doesn't cause, or increase, palpitations. He doesn't understand that palps are a hypo symptom. And, you're hypo because your FT3 is too low. Taking the amount of T3 you need to make you optimal will stop the palps. But, no-one can guess how much that amount would be.
I was taking 5mcg of T3.Yes, these tests r without T3.
Here in USA, endo shortage. Endocrinologist know more about Diabetis than thyroid. I can ask Endo to let me start T3 again. It was hard for him to agree to increasing my Levo 75mcg to 4 days a week.
My palpitations wake me up very often at 2-3 am, can’t go back to sleep! Thanks so much!
5 mcg T3 is a tiny dose, so that was probably the cause of your palps, and not the fact that you were taking the T3. You were under-medicated even with the T3. So, yes, it would be a good idea to ask for it back again, retest after six weeks, and see what happens. Pretty sure it would still be too low.
My dr disagrees about me restarting even a small dose of T3. He says my labs r not low. T 3 will cause heart arrhythmia & osteoporosis!
Well, I'm sorry, but he doesn't know what he's talking about. Your FT3 was low. Too low for good health and too low for good bones. Healthy bones need good levels of T3. Ask him if he's aware that a healthy thyroid produces its own T3. If T3 is so bad for you, why would it do that? You'd have to take a massive amount for it to cause heart arrhythmia. I take around 75 mcg a day - slightly less at the moment because it's so hot - and there's nothing wrong with my heart.
Also, tell him that a blood test only meansures what's in the blood - he ought to know this, but still... It cannot tell you what gets into the cells. And, T3 doesn't do anything in the blood, it's only when it attaches to T3 receptors that it's active. It's symptoms that tell you how much is getting into the cells, so if you still have symptoms, you don't have enough T3 in the cells.
Thanks for your feedback. Endocrinologist won’t even agree to 5 mcg T3. Will try another endocrinologist.
Yes, I think that would be a very good idea.
My palpitations are very minimal, finally ! I am on 50 mcg levo for 3 days and 75 mcg levo for 4 days a week. Endo won’t prescribe T3 at all.However, I noticed with slightest push like sneezing or coughing hard or pushing while constipated, I feel vertigo/ dizzy. When constipated, I have had dizziness when I push hard but never before did I experience dizziness while coughing hard or sneezing! Any one else experience this?
Everytime I’ve increased my dose of Levo I have had palpitations for the first couple of weeks but they pass. It may be your body is just getting used to the increase 🤷♀️
I've been having palpitations while titrating up to whatever will turn out to be good dose for me. I associate them with being under-medicated and that seems to be the opinion of a lot of people in this forum who say that the heart and brain need a lot of T3. If you don't have enough T3 you will get palpitations and brain fog. Both mean that vital organs are not working properly so one should keep this situation to as temporary as possible, while increasing the dose without increasing too fast.
My endo disagrees and says heart palpitations are a symptom of over medication and that since I still have lots of hypo symptoms the palpitations must be nothing to do with thryoid but to entirely separate heart problems and she wants me to have a cardio workup. This seems very unlikely to me as I did not have palpitations or cardio problems until I started to take Levo and while I was undermedicated. My Levo is now at or close to a good level and the palps have reduced.
I do think it is to do with thryoid. No harm having a cardio work up or ECG or whatever your doctor has in mind though is there?
Hi Suzi - I'm no expert, but I did experience ectopic beats after first taking levothyroxine, even on a really low dose (25mcg) - I came on here because of it! - They settled down. Had weird little headaches too, which also vanished. I hadn't had the heart-fluttering before I took levo, or the headaches, so I wondered if it was something to do with introducing the synthetic hormone. The ladies on here reassured me, and they were right, it all settled down. I'm on 50mcg now, and so far so good. Best wishes.
I had palpitations for the whole 7 years that I was hypo, but misdiagnosed. When I was diagnosed with overt hypo this year, I was put on 75mcg of levo. My palpitations got much worse. I began cutting my dose in half to 37.5mcg. My palpitations stopped. 6 weeks after starting levo, my tsh jumped higher, making me more hypo. I began taking the full 75mcg dose. No palpiations then. I assume that jumping on 75mcg without working up to it created the worse palpitations. Now that I have been on 75mcg for 5 weeks, my palpitations have started again, but not as bad. I think our bodies need to adjust to the levo. In my case, I view it as at least 7 years of damage that levo is trying to fix. It will take time. My kidney function took a major hit with being hypo and not treated. Because my kidneys were affected, my blood pressure skyrocketed. Now, my blood pressure is often great 115/75 since starting levo. I had an ECG before starting on levo that had shown sinus tachycardia which is also a symptom of my thyroid issue. Many of my hypo symptoms have went away, some have not. How long have you been on levo?
How to find if hypothyroidism becoming hyperthyroidism ? Pls reply ! 
T3 advice - heart palpitations
Heart palpitations 
