Loop dieuretics are very effective but EXTREMELY DANGEROUS. The pros you have heard of that droped dead were on loop dieuretics such as lasix. They deplete your system of all potassium which can lead to a fatal heart attack. If you want to use a dieuretic, use something like aldactone, which is potassium sparing. That is what I will use a couple of days before a show, and have never had any problems with it.