Type 1 diabetes

Dapagliflozin as an Adjunct to Insulin Improves Time-in-Range and Glycemic Variability versus Acarbose in Adults With Type 1 Diabetes: A Randomized Crossover Trial

Endocr PractPublished Randomised crossover trial

Authors' conclusion

In this short-term controlled study of adults with T1DM, adjunctive dapagliflozin was associated with improved CGM-derived glycemic control and reduced insulin dose versus acarbose, without diabetic ketoacidosis events. Longer term studies are warranted.

Study context

Population
Adults with T1D aged 18–60 years, HbA1c ≤ 9.0%44 completed both periods
Comparison
Dapagliflozin vs acarbose as adjuncts to insulin
Primary endpoint
TIR (3.9-10.0 mmol/L) on blinded continuous glucose monitoring (CGM)
Follow-up
Final 14 days of each 4-week period
Methodological detailsprospective, open-label, 2-week washout
  • Prospective
  • Open-label
  • 2-week washout

Primary result

As reported in the abstract

TIR

P < 0.001

Further findings

Total daily insulin dose · during treatment · lower with dapagliflozin

P = 0.001

Time in range (TIR) change from baseline with dapagliflozin · baseline to end of treatment

TIR with dapagliflozin, baseline to treatment
55.4% to 68.2%; P < .001

Mean glucose and glycemic variability (SD of blood glucose, largest amplitude of glycemic excursions) with dapagliflozin

Reduced from baseline with dapagliflozin
P < 0.01

Postprandial glucose excursions with acarbose

Reduced with acarbose
P = 0.001

Insulin requirement change from baseline with dapagliflozin

Insulin dose with dapagliflozin vs baseline
31.94 U vs 38.45 U, P = .009
  • Only dapagliflozin significantly reduced insulin requirements from baseline

Safety

OutcomeP value
Hypoglycemia frequencyDid not differP = 0.467

DKA

DKA events
0

Original publication

Dapagliflozin as an Adjunct to Insulin Improves Time-in-Range and Glycemic Variability versus Acarbose in Adults With Type 1 Diabetes: A Randomized Crossover Trial. Endocr Pract. Published 4 June 2026. doi:10.1016/j.eprac.2026.05.030

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