713, I take 400 mg once a day. When it was recommended to me by my Mayo Electrophysiolgist he did not specify a specific type.

I take a Puritan Pride product called, "Triple Magnesium Complex." The ingredients are, Magnesium Oxide, Magnesium Aspartrate, Magnesium Citrate. I believe on line I read, but was not told this by my electrophysiologist, citrate is the best.

When I told my Electrophsiologist was already taking it he recommended Mexiletine 150 mg and started with lowest dose. I was advised this is a quick metabolizing medication and has to be taken every 8 hours. Told within a day or two if not taken is gone from body. This is different from other rhythm medications that can be highly toxic and in body for long periods of time.

It did improve the PVCs but still there. I was warned that gaining weight will cause PVCs to go up especially atrial. I did gain weight during treatments for prostrate cancer but have been working on getting it down. Stress is also a trigger for PVCs.