Magnesium and heart rhythm problems

Posted by EllAmster @ellamster, Apr 17, 2019

Dear all.
I already posted something on magnesium in another group, asking if the tablets i was advised to take could have to do with some problems I am experiencing. But I thought I would post it here too.
I have a heart rhythm condition that sometimes really acts up. I had a TIA years ago, followed by my heart stopping less than a year later. So I am under supervision of a cardiologist.
But since I also have a bowel condition (sigh) my doctor told me to take 2 magnesium tablets a day, making a total of 1500 mg. per day. She said I could take even 6 tablets if I wanted to, because there are no side effects. I just heard that there can be, and I wonder if anyone of you has any experience with magnesium and a heart condition, and how this makes you feel.
I would love to share thoughts on the subject since I am not feeling very well ever since I started taking 1500 mg. of magnesium per day over two weeks ago. I called my doctor but they told me there are no side effects. So well, I thought I needed a few more thinking caps.

Interested in more discussions like this? Go to the Heart Rhythm Conditions Support Group.


Not replying to anyone in particular but a huge "thank you!" to everyone! Due to the Pfizer double jab, like many around the world, I am now sufferng from "hypersensitivty" to food! Yep, a world-wide study, compiling data from dozens of legit sources, noted this new problem. The CoVid vax with the highest number of food hypersensitivity? Pfizer. So, I'm NOT imagining a connection! Had well controlled mastocytosis. No problems but an occasional hive. Kept under control with 10 mg Claritin and 200 mg Tagamet per day. My only "trigger?" Tobacco smoke.

After the double jab, my strictly cutaneous mastocytosis escalated to MCAS-GI (Mast Cell Activation Syndrome-Gastrointestinal). Up to nine bouts of diarrhea per day. Imagine my loss of magnesium, of all electrolytes. A-fib was the next, connected symptom. The domino effect.

Intelligent observation above. Many forms of magnesium have a laxative effect. I was on a quest. I'm almost back to normal in terms of GI by staying on a diet that is extremely restricted (must avoid all high histamine foods). However, my A-fib (though better) does still result in the occasional blood clot. Using 1/2 of an adult aspirin every night to keep my blood thinned.

I will most definitely try the magnesium taurate mentioned above.

As to magnesium glycinate, it's supposed to have benefits for diabetics. Ergo, I'll be giving that to my husband after we've used up his magnesium citrate powder.

You people are awesome! If I have success with magnesium taurate in both "departments" (intestines and heart rhythm) I promise I'll report back. Oh, a test determined I am deficient in both magnesium and calcium. Also low in sodium, which explains my low blood pressure. B3 and E are vitamins I've got to boost. Slightly deficient in choline, too.

Considering what I've been going through the past 18 months, I am doing well. I'm a maniac about supplementation. Perhaps all those vitamins, minerals, herbs, enzymes, amino acids and more have kept me alive. Even regained 2 whole pounds. As of this morning, I'm up to 117!!!!

Don't. Give. Up!

Jump to this post

Thanks to your and others' posts, I've become aware I have two bottles of magnesium I've been relying on (different brands – one, I fished out my recycling bin to check).

Turns out both say they're magnesium oxide! One says it has added zinc (and I just read somewhere that zinc can negate the effect of certain eye vitamins – ones I take on doctors' orders, AREDS2. That zinc sensitivity only afflicts 15% of those taking the vitamins. ).

AREDs is very expensive and supposed to help ward off blindness for those with macular degeneration (Serious business! I'm almost blind in my right eye already.)

What's more, the zinc study was supposedly done on the basis of a double blind study seeing how people did on supplements with and without AREDS, both kinds (with and without zinc.) Not only did it show some people shouldn't take it, it said those with the zinc sensitivity could be harmed by it.)

Beating my head against the wall!!

So much for living on the internet trying to research issues to do with my two big diagnoses – AFIB/arrhythmia, and wet macular degeneration!

I'm about to arrange to arrange a "Watchman Procedure" (minor heart operation – if any heart operation is minor) so I can stop taking the blood thinner. Why? Because it turns out it worsens the timeline whereby wet macular degeneration leads to blindness. (It's incurable. A matter not of "IF" but "WHEN")

And vis a vis the magnesium, I've been taking what I thought was THE magnesium for two reasons:

1) To minimize my painful night-time leg cramps
2) To make sure I'm keeping up my electrolytes.

Now I'm completely flummoxed! I guess I'll do some more Googling to try to distinguish them, in case particular kinds are desirable for my purposes. I suspect the magnesium taurate [sic] isn't even available around here.

I don't think this conundrum would be complete without mentioning that thanks to a member here, I now realize I need to have a "reversal agent" available since I'm taking blood thinner.
That's because sometimes one needs to cancel out the blood thinning effect of that medicine, immediately – like if one has a hemorrhagic stroke (instead of the ischemic kind the blood thinners protect against. Or is in an accident and needs surgery, or…..or….) That member said he learned his local hospital didn't carry the reversal agent because it's too expensive – that the nearest hospital carrying it was 8 hours away! Well, I checked with my hospital and they don't have the anti-anti coagulant either.

In fairness, one needs one or two infusions of it FAST, if one needs it (like in case of the other kind of stroke). One infusion costs $25,000 and the second costs the same. I think I'm truly at my wits end about these issues. (I called my cardiologist to ask him about it, and he didn't even know the hospital didn't have the reversal agent!)


Thinking I ought to turn this into a new topic – about the difficulties in figuring out how to choose medicines
in terms of interactions. It's to the point to where I think I ought to just flip a coin about each issue and hold off on the Watchman Procedure. (I'll just add for good measure that I learned that Biotin, if taken before a thyroid test, distorts the results…)

At least I'll look for the new kind of magnesiums in case they're available to help both my cardiac arrythmia and the other for my
night-time cramps. TWO KINDS OF MAGNESIUM!?!

There IS such a thing as "Polypharmacy" – which is a medical malady whereby one is just taking too many pills. It's especially a problem with today's medicine, because with everything slightly complicated relegated to a specialist, no ONE doctor knows what we ought to be taking. That, plus doctors' tendency to recommend a pill to solve a problem called to his/her attention

I doubt even my PCP knows all my list of meds and supplements even though they're in my chart – much less how they interact.
(I'm supposed to take three separate medicines on an empty stomach first thing in the morning! How so??)


Interesting discussion on Magnesium. There is a risk to taking too much of any of the key electrolytes that govern body activities. Some of the unintended consequences that be serious… like arrhythmias.


Thank you both @afrobin and @catmom777 (cool nick by the way, cats!).
I don't think it's low sodium, I don't really have a low sodium diet. Something changed since about two weeks ago, and I have been feeling increasingly sick. But the brain swelling is interesting, I am used to drinking quite a lot of water, ever since I was young I would start my day with half a liter of water, then half a liter of tea (French roots, we drink 'un bol' [big breakfast bowl] or more for breakfast) and drink more during the day. But I don't think there is a relationship now. I did notice however that lately, even after drinking some tea, my head would feel like it was exploding and the pulsating sensations grew stronger. I will stop taking the magnesium for now to see if this will help me feeling better.

Jump to this post

This post is four years old, but I thought I'd mention that I used to need a whole lot more water than average, too. Then I figured out that I was eating way too much protein, more than my body could easily process, and that's why I needed so much water.
If you want to see how much protein (and other nutrients) you are getting, you can use the 'recipe nutrition calculator' on . . . it's free– I just type in an approximation of one day's food intake as if it were one 'recipe' and take a look at my totals for vitamins, minerals, amino acids etc.

Please sign in or register to post a reply.