Can a common diabetes pill make insulin therapy safer and more effective for type 1 diabetes?

Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.

Inclusion Criteria: * Age \>18 years * T1DM * Good general health * Fasting C-peptide concentration \<0.7 ng/ml * Poor glycemic control (HbA1c=7.0-11.0%) * Treatment with multiple daily insulin injections or insulin pump * Total daily insulin dose ≥0.6 U/kg per day * Stable insulin dose (±4 units) in the preceding three months. * eGFR≥60 ml/min * Weight stable over the preceding 3 months (± 3 pounds) * Do not participate in an excessively heavy exercise program Exclusion Criteria: * T2DM * Daily insulin dose \<0.6 U/kg per day * Fasting C-peptide \>0.7 ng/ml * HbA1c \<7.0% or \>11.0% * eGFR\<60 ml/min * Hematuria in urine analysis * Pregnancy, lactating, positive pregnancy test or planning to become pregnant in the following year. * Women of child-bearing potential will be requested to use at least two barrier methods before being enrolled in the study. * Major organ system disease which includes: (i) malignancy or history of malignancy including bladder cancer; (ii) Congestive heart failure or history of coronary heart disease or any other cardiac disease; (iii) chronic liver disease or LFT \>3 times the upper normal level; (iv) History of alcohol or drug abuse; (v) History of chronic lung disease (e.g., COPD, asthma); (vi) history of rheumatic disease; (vii) History of chronic pancreatitis or pancreatic surgery; (viii) History of CVA or TIA (ix) Planned surgery during the study; (x) history of HIV infection or other immune compromised disease; and history of organ transplantation; (xi) patients who take medications, other than insulin, known to affect glucose metabolism, e.g., prednisone. * Evidence of proliferative diabetic retinopathy * Patients enrolled in a heavy exercise program * Patients on ketogenic diet * History of hospitalization for DKA, hypoglycemia or uncontrolled hyperglycemia in the preceding 6 month. * Presence of symptoms of poor glycemic control, e.g. polydipsia or polyurea * History of hypersensitivity to dapagliflozin or pioglitazone