Loop diuretic use among patients with heart failure and type 2 diabetes treated with sodium glucose cotransporter-2 inhibitors.

AIMS:To compare loop diuretic use in patients with comorbid heart failure (HF) and type 2 diabetes (T2D) newly initiated on sodium glucose cotransporter-2 inhibitors (SGLT2Is) versus other oral anti-glycemic agents (AGAs). METHODS:This analysis used 2013-2015 MarketScan Medicare Supplemental claims data. HF and T2D patients were identified and SGLT2I users were propensity score matched to other AGA users. The mean daily dose of loop diuretics in furosemide equivalents was ascertained. For those not on baseline loop diuretics, new use was compared between cohorts. For those on baseline loop diuretics, we assessed patterns of use (increased dose, decreased dose, stable dose, no longer using) at 12-months. RESULTS:A total of 750 SGLT2I users were matched to 750 other AGA users. The distribution of loop diuretic use at mean doses of 0 mg (i.e., no use), ≤20 mg, >20 mg-40 mg, >40 mg-80 mg and >80 mg/day did not differ between cohorts at baseline or 12-months (p > 0.05 for both). SGLT2I use was associated with less new loop diuretic use (22.7% [79/348] vs. 34.0% [132/388]; p = 0.001). For those on loop diuretics at baseline (n = 764), patterns of use at 12-months did not differ between cohorts (p = 0.14). CONCLUSIONS:New loop diuretic use was less frequent among SGLT2I users; however, patterns of loop diuretic use did not differ between cohorts in those on loop diuretics at baseline.