Lasix (Furosemide) : Diuretics Synonyms: Frusamide, Frusimde, Aldalix, Arasemide, Bioretic, Bristab, Bristurin, Cetasix, Depix, Desal, Diucardin, Diurin, Dryptal, Edenol, Elodrine, Farsix, Finuret, Franyl, Frumex, Frusenex, Fulsix, Furomex, Furosemix, Hydol, Hydrex, Impugan, Katlex, Laxur, Liside, Mirfat, Odemex, Osyrol, Prefemin, Protargen, Salix, Seguril, Uridon, Vesix Lasix (Furosemide) is a loop diuretic used to treat high blood pressure, congestive heart failure, and swelling due to excess body water. It may also be used to treat other conditions as determined by your doctor.