The word Lasix comes from the word combination “last six”. This refers to an action duration – 6 hours. Lasix is a loop diuretic. It inhibits the Na-K-2Cl symporter located in the loop of Henle’s thick ascending limb. Lasix is a diuretic used in order to eliminate salt and water from the body. The filtered fluid in the end becomes urine. Furosemide works as a blocker of the sodium absorption, water and chloride from the filtered fluids and causes an increase of urine. After taking Lasix orally, the medication begins to act within an hour and diuresis lasts for 6-8 hours. After Furosemide injection, it begins to act after 5minutes and lasts for 2 hours.