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NCT07902726Not yet recruitingPhase 2

Adding Acetazolamide on Top of SGLT2 Inhibition in Persons With Type 2 Diabetes

Adding Acetazolamide on Top of SGLT2 Inhibition in Persons With Type 2 Diabetes ('DIPPER') Pilot Study

Source: ClinicalTrials.gov · Last updated 29 Oct 2026

Brief summary (registry, in English)

The study aims to determine the acute efficacy and safety of three sequential doses of acetazolamide (62.5 mg, 125 mg, 250 mg) each for 2 weeks in 20 patients with T2D receiving background SGLT2i therapy.

Status (registry)
Not yet recruiting
Phase (registry)
Phase 2
Study type
Interventional
Enrollment
20 (estimated)
First submitted
20 Oct 2026
Start date
1 Dec 2026
Primary completion date
1 Dec 2028
Lead sponsor
University Health Network, Toronto
NCT number
NCT07902726

What you commit to

  • Study type: Interventional · Phase 2
  • Planned participants: 20
  • From 1 Dec 2026 to the primary completion date, 1 Dec 2028
  • 1 site in 1 country
  • Visits and tests: ask the trial team, the registry does not list them

Built from the registry fields of ClinicalTrials.gov. It describes the study, not your situation.

Who cannot take part

Copied verbatim from ClinicalTrials.gov and grouped by topic. Only the trial team decides who can take part.

Prior treatment

  • Use of carbonic anhydrase inhibitor in the 30 days prior to screening
  • Acute coronary syndrome, stroke or transient ischemic attack within 30 days prior to screening
  • Participation in another drug trial within 30 days of screening

Other illness

  • Established diagnosis of type 1 diabetes as per Diabetes Canada
  • With known or suspected hypersensitivity or allergy to acetazolamide, dapagliflozin or related products
  • Untreated urinary or genital tract infection
  • Any other clinical condition that, based on Investigator's judgement, would jeopardize patient safety during trial participation or would affect the study outcome

Lab values

  • Serum potassium \<3.5 mmol/L
  • Serum bicarbonate \<22 mEq/L
  • Liver disease (hepatic cirrhosis, alcohol/drug abuse ≥3 months, or serum AST, ALT, or total bilirubin \>3X the upper limit of normal)

Other

  • Iodine intolerance
  • Severe glaucoma
  • Active pregnancy, breastfeeding or planning to become pregnant during study period
  • Patient not able to understand and comply with study requirements, based on Investigator's judgment.

Who the study is looking for

  • Signed and dated written informed consent.
  • Adult (≥18 years) at the time of consent
  • Established T2D diagnosis as per Diabetes Canada
  • HbA1c ≤10.0%
  • eGFR ≥45 ml/min/1.73m2
  • BP ≤160/90 and ≥90/60 mmHg
  • BMI 18.5-45.0 kg/m2
  • On stable dose of maximally tolerated RAASi for ≥30 days

Age in the registry: 18 years to - · Sex: All · Does not accept healthy volunteers

Full criteria on ClinicalTrials.gov

Sites (1)

Sites in registry order. Pick your city on the disease page to sort them by distance.

SiteCityCountrySite status
Toronto General Hospital
Coordinator of this site? Confirm its status
TorontoCanadaUnknown status

This page is information, not medical advice. Discuss any trial with your doctor.