hi I am having a problem with weight gain from water retention. I have gained 22 lbs in 3 weeks, I already take furosemide ( Lasix) 20mg and have upped it to 2 per day for last 3 days but does not seem to be working that well. I have no appetite , short of breath and back is painful to walk. Should I be thinking kidney problem?? Is furosemide bad for kidneys?I need information as this is all new to me I am 76 year old female.  thank you
hither should be work up on kidney function, sodium, potassium balance and heart status may consult a general physician for this. Some more diuretic like spironolactone be added best wishes