Hey guys, long time reader, first time poster.  A little info on myself, I am a 300 lbs wrestler who loves strong girls for the simple reason of having someone who can keep up with me without worrying about hurting them.   I lift free weights four times a week, circuit train 2-3 times a week and run when I can.  Due to my size, I throw down about 200 grams of protein powders a day (not counting my meals).  But I hit a plateau about six months ago which discouraged me almost to the point of stopping training, I wasn't getting size or strength gains. 
Then I heard about hemodilators.  (ah the point emerges!)  Now I'm really picky about what I fire down being that being a big guy is detrimental to a long life anyways but I can't find much if anything on these suppliments.  Anything you folks might have heard would be a real help to me on this one.  I have tried a few days of experimental doses and have noticed a huge increase in energy levels (I live at a high altitude and you get blown pretty quick here) as well as strength gains.  But again I would like to hear from you.

Thanks for the reply Stmercy.
Yeah I knew how they work, I guess I should've refined my question a bit more.  There's lots of things out there on how it works, I guess I was looking more for testimonials from other folks that might've tried it.  And for anything that might speak of any long term effects good or bad.  I'd hate to get used to this stuff only to find out it's the next Phen-phen as far as messing you up.

I'm taking diltiazem this winter for Reynaud's Syndrome - it's a calcium channel blocker and thus a vasodilator.  (For me, it's important to open up the fine capillaries.  My sister has the same problem and so did my maternal grandfather.)  Anyway, I've noticed that the diltiazem seems to be more than a mere treatment for the problem - it actually seems to be correcting the cause.  It's a bit surprising because I didn't think it would do that.