I just got some Stenox (Mexican brand Halo, which is what you will probably only find) which comes in 20 tab blister boxes of 2.5mg. I got all of mine for prices around $4.50 each box, so don't settle for $6. I'm only on my 4th day of it at 20mg/day and I can see some body changes, a very little strength gain, and a little more rage then I would have when I get aggrivated by someone. I'm not a raging person at all normally, but I notice a little every once in a while now. As for taking some right before a fight and if it will work or not, I have no clue. None of the people I know would ever want to fight me so I won't have a chance to test that out for you.