supraventricular tachycardia
"I wanted to add on a couple things to my previous review. Everyone warned me about how tired I was going to be since this medication would literally be slowing my heart down but I've never experienced that. I don't sleep much and have insomnia so that could be why. 

I also have experienced crazy dreams and I sleep walk from time to time. I've always had dreams and talked in my sleep but I think the medication makes it a little worse especially if you're taking it closer to bed time. 

I do get a little light headed if I stand up quick and bend down but it's not bad. 

The benefit I get from this medication outweighs any of these insignificant side effects. I would recommend to push through any side effects and let the medication adapt to you!"