i found folate helpful for my tachycardia, i'm taking 400µg dailyDid you continue with agmatine? Since high heart rate is one of my symptoms I've been looking at what I can take. Beta blockers make me feel weird and didn't lower HR enough at the dosage I was taking. Hawthorn doesn't do that much. I only took agmatine a couple times but looking at revisiting that in higher dosages or trying Zyrtec again - trying to decide.