Metformin vs. Jardiance

See how Metformin and Jardiance compare on approved uses, dosing, side effects, and cost.

Key Takeaways

  • Metformin is a low-cost, first-line pill that lowers blood sugar by reducing how much glucose the liver makes, while Jardiance also protects the heart and kidneys.

  • Metformin's most common side effects are gastrointestinal, while Jardiance can cause genital infections and, rarely, diabetic ketoacidosis.

  • Many people with type 2 diabetes and heart or kidney disease end up taking both drugs together, since they work through different pathways.

Metformin vs. Jardiance Drug Summary

Metformin

Metformin is a biguanide that lowers blood sugar by decreasing glucose production in the liver and improving insulin sensitivity. It's the first-line oral treatment for type 2 diabetes in adults and children 10 and older, taken as a tablet or liquid, usually with meals.

Jardiance

Jardiance is an SGLT2 inhibitor that lowers blood sugar by causing the kidneys to remove excess glucose through urine. It's approved for adults and children 10 and older with type 2 diabetes, and also to reduce cardiovascular death, heart failure, and kidney disease progression, taken once daily as a tablet.

Metformin vs. Jardiance Side Effects

Metformin

Most common
Diarrhea (>5%)
Nausea/vomiting (>5%)
Flatulence (>5%)
Asthenia (>5%)

Jardiance

Most common
Hypoglycemia (up to 41.3% w/ insulin/SU)
Urinary tract infection (up to 9.3%)
Female genital mycotic infection (up to 5.4%)
Increased urination (1% to 10%)

Metformin vs. Jardiance Dosage

Metformin

Dosage
Dosage Table
STAGE DOSE WHEN
Starting dose 500 mg twice daily Week 1
Maximum dose 500 mg once daily Week 1
Dose changes 2 increases As tolerated

Jardiance

Dosage
Dosage Table
STAGE DOSE WHEN
Starting dose 10 mg once daily At the start
Maximum dose 25 mg once daily If needed
Dose changes 1 increase As tolerated

Metformin vs. Jardiance Indications

Metformin

Metformin is FDA-approved for blood sugar control in adults and children 10 and older with type 2 diabetes. It's also used off-label for polycystic ovary syndrome and for weight management in people with prediabetes.

  • Type 2 diabetes in adults

  • Type 2 diabetes in children 10+

  • Off-label: PCOS

  • Off-label: prediabetes/weight management

Jardiance

Jardiance is FDA-approved for blood sugar control in adults and children 10 and older with type 2 diabetes. It's also approved to reduce cardiovascular death in people with heart disease, to reduce heart failure hospitalization, and to slow chronic kidney disease progression.

  • Type 2 diabetes in adults

  • Type 2 diabetes in children 10+

  • Reduce cardiovascular death in heart disease

  • Reduce heart failure hospitalization

Metformin vs. Jardiance Pros and Cons

Metformin

Metformin has decades of safety data and is one of the least expensive diabetes medications available. It doesn't cause weight gain or significant hypoglycemia on its own, though GI side effects are common early in treatment.

Pros

  • Roughly $4 to $30 per month without insurance

  • Decades of real-world safety data

  • Low risk of hypoglycemia when used alone

  • Available in immediate- and extended-release forms

Cons

  • Common GI side effects like diarrhea and nausea

  • Boxed warning for rare but serious lactic acidosis

  • Must be paused before contrast dye imaging

  • Doesn't provide direct heart or kidney protection

Jardiance

Jardiance offers proven cardiovascular and kidney benefits beyond blood sugar control, with simple once-daily dosing and no titration needed. It carries a much higher price tag along with risks of genital infections and rare but serious complications.

Pros

  • Once-daily dosing with no titration schedule

  • Reduces risk of cardiovascular death in heart disease

  • Reduces heart failure hospitalization risk

  • Slows chronic kidney disease progression

Cons

  • Roughly $350 to $620 per month without insurance, before savings programs

  • Increased risk of genital yeast infections and UTIs

  • Rare risk of diabetic ketoacidosis even with normal blood sugar

  • Rare but serious risk of Fournier's gangrene

Common Symptoms and Related Diseases You Can Explore

Explore a range of common symptoms the Doctronic Symptom Checker can help you understand.