From the Guidelines
GLP-1 receptor agonists and SGLT2 inhibitors are two medication classes used for both diabetes management and weight loss, with current GLP-1 medications including semaglutide, dulaglutide, liraglutide, tirzepatide, exenatide, and lixisenatide, and SGLT2 inhibitors including empagliflozin, dapagliflozin, canagliflozin, and ertugliflozin, as recommended by the most recent guidelines 1.
Key Medications
- GLP-1 receptor agonists:
- Semaglutide (Ozempic, Wegovy, Rybelsus)
- Dulaglutide (Trulicity)
- Liraglutide (Victoza, Saxenda)
- Tirzepatide (Mounjaro, Zepbound)
- Exenatide (Byetta, Bydureon)
- Lixisenatide (Adlyxin)
- SGLT2 inhibitors:
- Empagliflozin (Jardiance)
- Dapagliflozin (Farxiga)
- Canagliflozin (Invokana)
- Ertugliflozin (Steglatro)
Mechanism of Action
- GLP-1 receptor agonists: mimic the incretin hormone GLP-1, increasing insulin secretion, decreasing glucagon, slowing gastric emptying, and increasing satiety 1
- SGLT2 inhibitors: prevent glucose reabsorption in the kidneys, causing glucose excretion in urine, which lowers blood sugar and leads to caloric loss 1
Dosing and Administration
- GLP-1 agonists: most are administered as weekly injections, except Rybelsus which is oral and Victoza/Saxenda which are daily 1
- SGLT2 inhibitors: taken orally once daily 1
Side Effects and Benefits
- GLP-1 agonists: side effects include nausea, vomiting, and diarrhea, while offering cardiovascular and renal benefits beyond glucose control and weight management 1
- SGLT2 inhibitors: may cause genital infections, urinary tract infections, and volume depletion, while also offering cardiovascular and renal benefits 1
From the Research
GLP-1 Receptor Agonists
- The following GLP-1 receptor agonists are used for diabetes and weight management:
- These medications have common mechanisms of action, including augmentation of hyperglycemia-induced insulin secretion, suppression of glucagon secretion, deceleration of gastric emptying, and reduction in calorie intake and body weight 2
SGLT2 Inhibitors
- The following SGLT2 inhibitors are used for diabetes and weight management:
- These medications have been shown to improve glycaemic control, promote weight loss, and lower blood pressure, with added benefits of reducing urinary and genital tract infections 6
Comparison of GLP-1 Receptor Agonists and SGLT2 Inhibitors
- Both classes of medications have been shown to be effective in improving glycaemic control and promoting weight loss, but may have different mechanisms of action and side effect profiles 2, 6
- GLP-1 receptor agonists may have a greater effect on weight loss and cardiovascular risk markers, while SGLT2 inhibitors may have a greater effect on reducing blood pressure and urinary tract infections 2, 6