Furosemide generic for Lasix: My question is? There's a difference in how this same medicine has different results. The expensive Lasix fluid stay off. Furosemide the fluid slowly return. Cost effective but not most productive. Three personal encounters. Conversation I must prove. There is something in Lasix that is a different quality than furosemide. Help me prove my point. I've personally experience three different individuals that paid for the Lasix. Fluid stay off, Took furosemide fluid returned. Would I have to get ingredients or call the manufacture. Furosemide manufacture is SANOFI. What' Lasix manufacture? Or Do you know. Can you help me. Respectable Care.