Lasix Injection belongs to a group of medicines called diuretics. It is used for the emergency treatment of very high blood pressure (hypertensive emergency), as it reduces the blood pressure immediately. It also rapidly reduces the swelling (edema) caused by too much water in the body. Lasix Injection helps your body get rid of extra water and salt through urine. It is commonly used to treat people with excess fluid build-up due to heart failure, liver or kidney disease. It is injected into a vein under the supervision of a doctor. Your doctor may monitor your blood pressure after giving this medicine.Common side effects of this medicine include dizziness, weakness, dehydration, decreased potassium level in blood, increased blood uric acid, decreased magnesium level in blood, and increased thirst. These are usually mild and disappear after a short time. Consult your doctor if they bother you or do not go away.Before taking this medicine, let your doctor know if you have any liver problems. Pregnant or breastfeeding women should also consult their doctor before taking it. Regular monitoring of kidney function tests and electrolyte levels is important while using this medicine.It may reduce the potassium level in your blood so your doctor may ask you to add potassium-rich foods to your diet (such as bananas, coconut water, etc.) or prescribe supplements. Any medication that is advised by your doctor for the long-term treatment of your underlying condition should be continued even after this emergency injection.