betablockers and beaus lines in fingernails?

[beema36]

I am hoping somebody here can answer my question. I take a betablocker for tachycardia. My heart rate now runs in 40s to 60s which cardiologist says is okay.
I developed horizontal lines or indentations in 2 fingernails. No injury. My Dr called them Beaus lines. He says I was either exposed to a toxin of some sort or they can be a result of a systemic disease. He seemed very unconcerned. In my reading betablockers pop up as a possible cause. My question is if the betablocker caused them does that mean it is harming me?
I went to my pharmacy and he said only if your heartrates slow. I told him it now runs very low and my cardiologist and electrophysilogist think that's fine. He just basically walked off. I just want to be sure I am not hurting myself with the betablocker.
I know this is probably clear,as mud but hopefully someone can tell me as I know many if you take betablockers.

[Parvosufferer]

Hi

I know it has been a while since your post. I also have these horizontal lines in all my fingernails. They are worse in my thumbs and big toes, and get less deep towards my little fingers and toes. I also take a beta blocker for tachycardia, although a very small dose. I also have a lot of unresolved health issues and am still under investigation. I too wonder if this is because of my beta blockers, or because of an underlying medical condition.

[beema36]

Tom,
Thank you for your response and the web link. Except for the fact they look awful and one I think is going to make part of my nail come off I wasn't too worried as my Dr seemed unconcerned. Then after my pharmacists remark regarding my low heartrate I became concerned possibly my hearts being damaged. I feel better now. Thank you.
Beema

[tom_h]

Beau's lines can be caused by a number of things, from a common cold, to systemic illnesses, and yes, beta blockers.  During the five or six years that I've taken the same beta blocker at different strengths, I have occasionally experienced a Beau's line in one or two fingernails.  Wikipedia.org has a good write up on Beau's lines.