Antidiabetics Renal Dosing by eGFR and Creatinine Clearance
9 agents · renal dose adjustment
Renal dose adjustment for antidiabetics by eGFR and creatinine clearance: each drug's cutoff, key caution, and the estimate its label uses.
Medically reviewed by Dr. Rishi Kumar Kafle, MBBS, MD, FASN. Last reviewed October 2026.
This chart covers renal dose adjustment for the 9 antidiabetics in this registry: Alogliptin, Canagliflozin, Dapagliflozin, Empagliflozin, Glipizide, Glyburide, Metformin, Saxagliptin and Sitagliptin. Of these, 1 is dosed by creatinine clearance from Cockcroft-Gault (Alogliptin); 7 are labelled by eGFR in mL/min/1.73m² (Canagliflozin, Dapagliflozin, Empagliflozin, Glyburide, Metformin, Saxagliptin and Sitagliptin); and 1 has no CrCl dose band (Glipizide). Each drug links to its own page with the full threshold, cautions, and an FDA-label reference.
Reviewed and approved by Dr. Rishi Kumar Kafle, MBBS, MD, FASN. Always confirm against the label.
Antidiabetics: renal dosing chart
| Drug | Renal estimate | Dose adjustment | Key caution |
|---|---|---|---|
| Alogliptin | creatinine clearance (Cockcroft-Gault) | <60 -> 12.5 mg; <30 -> 6.25 mg | See label |
| Canagliflozin | eGFR | <30 limited; per indication | See label |
| Dapagliflozin | eGFR | Glycemic efficacy <45 limited; CKD use >=25 | See label |
| Empagliflozin | eGFR | Glycemic efficacy limited <30; per indication | volume/eGFR dip |
| Glipizide | no renal estimate (no adjustment) | Preferred sulfonylurea in CKD; caution | hypoglycemia |
| Glyburide | eGFR | Avoid in stage 3-5 CKD | prolonged hypoglycemia |
| Metformin | eGFR | <30 contraindicated; 30-45 do not initiate / halve | lactic acidosis |
| Saxagliptin | eGFR | <=45 -> 2.5 mg | See label |
| Sitagliptin | eGFR | <45 -> 50 mg; <30 -> 25 mg | See label |
Cutoffs That Change Antidiabetics Doses
The rules above name 2 creatinine clearance cutoffs, from 60 down to 30 mL/min. Each line lists the drugs whose rule changes at that value:
- 60 mL/min: Alogliptin
- 30 mL/min: Alogliptin
The eGFR-labelled agents use 3 cutoffs in mL/min/1.73m²:
- eGFR 45: Dapagliflozin, Metformin, Saxagliptin and Sitagliptin
- eGFR 30: Canagliflozin, Empagliflozin, Metformin and Sitagliptin
- eGFR 25: Dapagliflozin
Rules without a numeric renal-function cutoff: Glyburide and Glipizide. Read their full rule in the chart and on each drug page. A cutoff that sits between two bands still needs the label wording, because some labels use "less than" and others "at or below" the value.
Worked Example: Antidiabetics at a CrCl of About 49 mL/min
A 70-year-old man weighing 70 kg with a serum creatinine of 1.4 mg/dL has a Cockcroft-Gault creatinine clearance of about 49 mL/min. The rules to check first are those with a numbered step above that value: Alogliptin (60 mL/min). The eGFR-labelled agents need an eGFR estimate instead of this figure.
How the Antidiabetics Cutoffs Compare With the Standard Bands
Many renally cleared drugs follow four broad creatinine clearance bands: above 50, 30-50, 15-30, and below 15 mL/min. Of the 2 CrCl cutoffs named in this class, 1 sits on a standard band edge (30 mL/min) and 1 does not (60 mL/min), so the generic bands are only a rough guide for antidiabetics. Where a drug's own cutoff and the generic band disagree, the drug's cutoff takes precedence.
Avoidance, Dialysis and Monitoring Notes
- Avoid or contraindicated: Glyburide (Avoid in stage 3-5 CKD); Metformin (<30 contraindicated).
- Dialysis: no antidiabetics rule here mentions dialysis, so take dialysis dosing from each label.
- Levels and monitoring: none of these rules is level-guided; monitor renal function and clinical response.
Which Renal Estimate the Labels Use for Antidiabetics
Use the eGFR calculator for the eGFR-labelled agents and the creatinine clearance calculator for the rest. The two estimates can differ markedly in small, large, elderly or frail patients; see how creatinine clearance differs from eGFR.
Where These Thresholds Come From
The 9 rules for antidiabetics were compiled from the FDA label (7 drugs), the Pharmacy Times renal dosing reference (2 drugs) and standard clinical pharmacology references (1 drug). Thresholds cross-checked against the FDA label or a guideline source: Metformin and Sitagliptin. Every value has been reviewed by a clinician, and each drug page links its label through DailyMed.
How Reduced Kidney Function Affects Antidiabetics
Renal impairment slows the elimination of antidiabetics and of any active metabolites the kidney clears. It also shifts the balance of benefit and harm, so dose-related adverse effects become more likely at the same nominal dose. The chart above gives the key caution for each agent. When one agent must be avoided below a cutoff, another in the class may be safer, so weigh the indication, the patient's trajectory, and monitoring availability. Record the estimate, the equation, the weight, and the date behind each dose, and re-estimate once a changing creatinine settles.
Calculate the Patient's CrCl First
Estimate creatinine clearance with the Cockcroft-Gault equation and the right dosing weight. Use actual body weight when it is below ideal body weight, ideal body weight up to 130% of ideal, and adjusted body weight above 130% of ideal, as in obesity. Re-estimate whenever kidney function may have changed, since acute illness and dehydration can lower clearance within days.
Related classes: Cardiovascular renal dosing (includes spironolactone, also labelled by eGFR).