Furosemide, sold under the brand name Lasix among others, is a loop diuretic medication used to treat edema due to heart failure, liver scarring, or kidney disease.[4] Furosemide may also be used for the treatment of high blood pressure.[4] It can be taken intravenously or orally.[4] When given intravenously, furosemide typically takes effect within five minutes; when taken orally, it typically metabolizes within an hour.[4]
Common side effects include orthostatic hypotension (decrease in blood pressure while standing, and associated lightheadedness), tinnitus (ringing in the ears), and photosensitivity (sensitivity to light).[4] Potentially serious side effects include