Frusemide (furosemide) molecule

Frusemide, also called furosemide (brand names include Lasix®), is a diuretic drug ('water pill') commonly used to treat edema (fluid retention) and hypertension (high blood pressure). When given by injection, frusemide acts rapidly. It is therefore often used in emergencies to treat pulmonary edema (fluid in the lungs).


Furosemide normally comes as a tablet or liquid to be taken by mouth. It usually is taken once a day in the morning or twice a day in the morning and afternoon. The directions on the prescription label should be followed carefully.


Possible side-effects of frusemide

Frequent urination may last for up to 6 hours after a dose and should decrease after you take frusemide for a few weeks. A doctor should be informed if any of the following symptoms are severe or do not go away: muscle cramps, weakness, dizziness, confusion, thirst, upset stomach, vomiting, blurred vision, headache, restlessness, or constipation.