SGLT-2 Inhibitors: Names and Classification
SGLT-2 inhibitors currently available include canagliflozin, dapagliflozin, empagliflozin, ertugliflozin, and sotagliflozin, with the first three being the most commonly used for chronic kidney disease and cardiovascular risk reduction. 1
Main SGLT-2 Inhibitors
Primary SGLT-2 Inhibitors
- Dapagliflozin - Highly selective for SGLT-2 1
- Empagliflozin - Highly selective for SGLT-2 1
- Canagliflozin - Has greater potential for inhibiting SGLT-1 receptors in addition to SGLT-2 1
- Ertugliflozin - Highly selective for SGLT-2 1
Dual SGLT Inhibitor
- Sotagliflozin - Referred to as a "dual SGLT1/SGLT2 inhibitor" due to its higher affinity for SGLT-1 receptors 1
Selectivity Characteristics
SGLT-2 inhibitors vary in their selectivity for the SGLT-2 co-transporter:
- Most selective for SGLT-2: Dapagliflozin, empagliflozin, and ertugliflozin 1
- Less selective with SGLT-1 inhibition: Canagliflozin (has reported inhibition of intestinal glucose absorption) 1
- Dual action: Sotagliflozin (has the most affinity to SGLT-1 receptors) 1
Clinical Applications
SGLT-2 inhibitors are primarily used for:
- Type 2 diabetes management 1
- Chronic kidney disease - Particularly for patients with eGFR ≥20 mL/min/1.73 m² 1, 2
- Cardiovascular risk reduction - Especially in patients with established cardiovascular disease 1
- Heart failure - Particularly heart failure with reduced ejection fraction 1
Mechanism of Action
SGLT-2 inhibitors work by:
- Blocking renal glucose reabsorption in the proximal convoluted tubule 1
- Increasing urinary glucose excretion 1
- Reducing the renal glucose threshold 1
- Promoting glycosuria in diabetic patients 1
Important Clinical Considerations
When prescribing SGLT-2 inhibitors, be aware that:
- They can be used in patients with eGFR ≥20 mL/min/1.73 m² 1, 2
- They should be used with caution in patients with renal insufficiency (GFR < 45 mL/min/1.73 m²) 1
- Common adverse effects include genitourinary tract infections 1
- Rare but serious adverse effects include euglycemic ketoacidosis 1
- They provide significant cardiovascular and renal benefits beyond glucose control 1
SGLT-2 inhibitors represent an important class of medications that extend beyond glycemic control to provide significant cardiovascular and renal protection, making them increasingly important in the management of type 2 diabetes and its complications.