Hi there, I happened to be doing some Googling on the medication I used to take when I was younger and as it happened this was one of the results. As you might guess, I used to use Inderol. So I decided to go ahead and register an account to offer my 2 cents about it.
As you're probably aware it's a time-release beta blocker, so you take whatever your prescribed amount is and it is supposed to reduce the frequency of your migraines. Personally, I had some real success with it. It definitely did like it advertised, so while I did still get migraines, I didn't get them anywhere's close to as frequency. One thing I did notice though, was while I was on Inderol I was prone to occasional dizzy spells, especially if I would get up to fast or something like that. Once I while I was walking down the hallway of my house I actually fainted! That was a first for me and pretty scary. But aside from that I can't really say anything bad about the medication. I ended up weening myself off of it while I was in college and my migraines never returned with the frequency they once had. Not saying that was because of the medication, personally I think it has more to do with how my biology changed in those years, but I suppose it's theoretically possible.
Anyway, I hope this helped some. Let me know if you have any other questions and I'll answer them to the best of my ability!