Most of the people around here are pretty strongly against speedy pills, or speedbombs, and with good reason...
If you want to find out more, and you really should, because speedy pills are nasty stuff for so many reasons, just do a search for speedbombs.
Some people do say that a speedbomb once in a while is ok, and that there can be times when they're good, but that's not my opinion, so I can't recommend any...