According to MedicineNet, furosemide is used medically because of its strong diuretic properties. The medication is available in three different oral tablet dosages: 20, 40 and 80 milligrams.
Furosemide is generally prescribed to patients suffering from excess fluid as a result of heart or kidney problems, explains MedicineNet. Water, salts and other ions are filtered out of the blood into the kidney tubules, ultimately destined to become urine; however, not all the substrates originally filtrated go into the urine as the kidneys re-absorb most of the filtered water and salt. Furosemide works by blocking this process, therefore increasing the volume of water pushed out of the body.