Which diuretics are safe and effective for patients with a sulfa allergy?
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Diuretics that do not contain a sulfonamide group (eg, amiloride hydrochloride, eplerenone, ethacrynic acid, spironolactone, and triamterene) are safe for patients with an allergy to sulfa. The evidence is contra-dictory as to whether a history of allergy to sulfonamide antibiotics increases the risk of subsequent allergic reactions to commonly used sulfonamide-containing diuretics (eg, carbonic anhydrase inhibitors, loop diuretics, and thiazides) (strength of recommendation: C, based on case series and poor quality case-control and cohort studies).
Journal of Family Practice, 56(6) 2007: 488+.
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