Bumex (Bumetanide)
Bumex is a brand of bumetanide, the potent loop diuretic widely used for heart failure, refractory oedema and hypertension. It is approximately 40 times more potent by weight than furosemide and offers more reliable oral absorption, supporting use when furosemide fails.
- Active ingredients
- Bumetanide
- Manufacturer
- Validus Pharmaceuticals
- Dosage forms
- tablet
- Available dosages
- 0.5mg, 1mg, 2mg
- Category
- Diuretics
What is it?
Bumex is the brand name under which bumetanide is marketed in the United States, originally introduced by Roche in 1983 and currently distributed by Validus Pharmaceuticals. It is sold as Burinex in Europe. Authorised generic bumetanide is widely available and dominates current prescribing — most clinical use today is on the generic. Bumex remains a recognisable name in heart-failure care, where its more reliable absorption and high potency make it a go-to alternative when furosemide is ineffective.
Active ingredients
Each Bumex tablet contains 0.5mg, 1mg or 2mg of bumetanide. The active substance is identical between branded Bumex and authorised generic bumetanide tablets, with bioequivalence required by the regulator. The dose ratio of bumetanide:furosemide is approximately 1:40, so 1mg Bumex is approximately equivalent to 40mg furosemide.
Forms and dosages
Bumex is supplied as oral tablets in 0.5, 1 and 2mg strengths. For heart-failure oedema, typical starting dose is 0.5–1mg once or twice daily, titrated based on weight and symptom response. For refractory oedema, doses up to 10mg daily may be used. Bumex is taken in the morning, with the second dose (if used) in the early afternoon to limit night-time urination. Onset of diuresis is within 30–60 minutes.
Indications
Bumex is approved for oedema in heart failure, hepatic cirrhosis or chronic kidney disease, and for refractory oedema unresponsive to other diuretics. According to current heart-failure guidelines, Bumex is a useful alternative when furosemide absorption is variable or the patient is diuretic-resistant. It is also used off-label for hypertension, although thiazides and longer-acting loops are typically preferred first-line.
How it works
Bumetanide blocks the Na-K-2Cl cotransporter in the thick ascending limb of the loop of Henle, producing potent natriuresis and diuresis. Unlike thiazides, loop diuretics retain efficacy in patients with renal impairment, making them the diuretic class of choice when GFR is reduced. The diuretic effect develops within 30–60 minutes of oral dosing and lasts 4–6 hours.
Frequently asked questions
Is Bumex better than furosemide for heart failure? ▾
Bumetanide has more reliable oral absorption (80–95% bioavailability vs 50–60% for furosemide) and is approximately 40 times more potent by weight. It is useful when furosemide absorption is variable or patients are diuretic-resistant. According to current heart-failure guidelines, Bumex is a reasonable alternative to furosemide when absorption issues drive treatment failure.
When during the day should I take Bumex? ▾
Take it in the morning to avoid night-time urination. Diuresis begins within 30–60 minutes and continues for 4–6 hours, so a morning dose has its main effect during waking hours. If twice-daily dosing is prescribed, the second dose is typically taken in the early afternoon. Consistent timing helps establish steady fluid balance.
What lab tests are needed on Bumex? ▾
Serum potassium, sodium, magnesium, renal function and uric acid are checked at baseline, 1–2 weeks after starting or any dose increase, and periodically thereafter. Hypokalaemia and hypomagnesaemia are common and may require oral supplementation, ACE inhibitor combination, or potassium-sparing agents. Glucose and weight are also tracked, particularly in heart failure.
Can I take Bumex if I have a sulfa allergy? ▾
Bumetanide is a sulfonamide-derived diuretic, so a true sulfa allergy is a relative contraindication. According to clinical practice, true cross-reactivity with sulfonamide antibiotics is uncommon but the prescriber must weigh risks individually. If Bumex is contraindicated, ethacrynic acid is the only loop diuretic without a sulfonamide group.
Is Bumex the same as generic bumetanide? ▾
Yes — Bumex and authorised generic bumetanide tablets contain the same active ingredient at the same strengths and have demonstrated bioequivalence. The generic is significantly cheaper and clinically equivalent in nearly all cases. The Bumex trademark survives mainly in the United States; in many other countries the generic name or other brands are used.
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The information on this website is provided for reference and educational purposes only. It does not replace consultation with a qualified healthcare professional.