Ive taken as much as 00 mg of generic at one time with no effect whatsoever. Yes No Report as inappropriate May , 00 :0 AM Review by ksop lasix by iv User Rating Lasix (furosemide) for Edema: I have had pitting edema, severe water retention all over my body lasix by iv mainly my face, hands, ankles, feet and lower legs. Furosemide should only be ...