edema
"I have had several experiences with Lasix. The first time I was on it I lost a lot of the edema but then it came back. I have nephrotic syndrome which comes and goes. So I currently have to be on the Lasix for periods at a time. Yes it does cause painful muscle spasms that are caused to losing potassium and basically being dried out from constant urination. This time around Lasix seems to be working better.  "