jaypo, no change for me, I'm so disappointed. Third night with them and I have to say my sleep is worse, (I don't feel they even relax me), and each time I wake my palpitations are stronger. I also had cramp in my leg through the night. All these things are what magnesium is supposed to help, so I don't know whether the doctor may have a point, in that extra magnesium, when my levels are not low, may have the opposite effect. I also don't know if the magnesium I am taking is the most appropriate for palpitations, there are so many different ones. I'm taking EpsilonLife 100% chelated magnesium glycinate. Each capsule contains 500mg of mag (100mg of elemental mag - whatever that means) I am only taking one, I can take 1 -3 daily. I know this is the best one to cause less stomach issues. It's very confusing. I'll not take one tonight and see if my sleep changes and the palpitations lessen. Trial and error I suppose. Just need rid of the palpitations!!