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Bumetanide is a loop diuretic of the sulfamyl category to treat heart failure. It is often used in patients in whom high doses of furosemide are ineffective. There is however no reason not to use bumetanide as a first choice drug. The main difference between the two substances is in bioavailability. It is said to be a more predictable diuretic, meaning that the predictable absorption is reflected in a more predictable effect. Bumetanide is 40 times more potent than furosemide (for patients with normal renal function).
Bumetanide interferes with renal cAMP and/or inhibits the sodium-potassium ATPase pump. Bumetanide appears to block the active reabsorption of chloride and possibly sodium in the ascending loop of Henle, altering electrolyte transfer in the proximal tubule. This results in excretion of sodium, chloride, and water and, hence, diuresis.
Dosage & Administration
Oral: 1 mg in the morning , repeated after 6-8 hours if necessary, In severe cases , 5 mg daily increased by 5 mg every 12-24 hours according to response. Elderly , 500 micrograms daily may be sufficient.
- By IV Injection: 1-2 mg, repeated after 20 minutes if necessary. Elderly, 500 micrograms (1 ml of Bumetanide) daily may be sufficient.
- By IV Infusion: 2-5 mg over 30-60 minutes.Elderly, 500 micrograms (1 ml of Bumetanide) daily may be sufficient.
- By IM Injection: 1 mg initially then adjusted according to response , Elderly 500 micrograms (1 ml of Bumetanide) daily may be sufficient.