Propanolol has many uses. Migraine prevention, heartbeat irregularities, thyroid problems, and a few others including hypertension. I take it for the first three. I've been on and off it (mostly on) since 1995, and find I have no side effects. However, I've had a few doctors mention it's good for anxiety. Not for me, and not for my husband. We are both on it, and have anxiety. I doesn't help a bit. I am on Xanax and he is on Klonopin for anxiety. If there is any drug that is GOOD for you, it's Propanolol, provided it doesn't cause any bad side effects. The only possible side effect I can think of is memory loss and nightmares, both of which I have, but am not sure if Propanolol is responsible. But it does help with my irregular heart beat, and that is a BIG plus, as it terrifies me.