Januvia vs. Farxiga
See how Januvia and Farxiga compare on approved uses, dosing, side effects, and cost.
Key Takeaways
Januvia only lowers blood sugar, while Farxiga is also approved for heart failure and chronic kidney disease.
Januvia is a flat once-daily dose with no titration, while Farxiga starts at 5 mg and can increase to 10 mg.
Januvia's most common side effects involve the respiratory tract, while Farxiga's involve urination and genital infections.
Januvia vs. Farxiga Drug Summary
Januvia
Januvia (sitagliptin) is a DPP-4 inhibitor used to lower blood sugar in adults with type 2 diabetes. It's taken as a single oral tablet once a day, with the dose set by kidney function rather than gradual titration. It's typically used alongside diet and exercise.
Farxiga
Farxiga (dapagliflozin) is an SGLT2 inhibitor that lowers blood sugar in adults and children 10 and older with type 2 diabetes. It's also approved to reduce heart failure hospitalization, treat heart failure directly, and slow chronic kidney disease. It's taken as one oral tablet daily, starting at 5 mg with an option to increase to 10 mg.
Januvia vs. Farxiga Side Effects
Januvia
Farxiga
Januvia vs. Farxiga Dosage
Januvia
Farxiga
| STAGE | DOSE | WHEN |
| Starting dose | 25 mg once daily | At the start |
| Maximum dose | 100 mg once daily | If needed |
| Dose changes | 2 increases | As tolerated |
| STAGE | DOSE | WHEN |
| Starting dose | 5 mg once daily | At the start |
| Maximum dose | 10 mg once daily | If needed |
| Dose changes | 1 increase | As tolerated |
Januvia
| STAGE | DOSE | WHEN |
| Starting dose | 25 mg once daily | At the start |
| Maximum dose | 100 mg once daily | If needed |
| Dose changes | 2 increases | As tolerated |
Farxiga
| STAGE | DOSE | WHEN |
| Starting dose | 5 mg once daily | At the start |
| Maximum dose | 10 mg once daily | If needed |
| Dose changes | 1 increase | As tolerated |
Januvia vs. Farxiga Indications
Januvia
Januvia is approved for one purpose: helping adults with type 2 diabetes manage blood sugar alongside diet and exercise. It doesn't carry approvals for heart or kidney conditions. It's not approved for type 1 diabetes or diabetic ketoacidosis.
Blood sugar control in adults with type 2 diabetes
Used as an add-on to diet and exercise
Often added after metformin isn't enough alone
Not approved for type 1 diabetes or ketoacidosis
Farxiga
Farxiga covers a broader range of approved uses than most oral diabetes drugs. Beyond blood sugar control in adults and kids 10 and up, it's approved for heart failure and to slow chronic kidney disease. It's not approved for type 1 diabetes or for treating existing diabetic ketoacidosis.
Blood sugar control in adults and kids 10+
Reduces heart failure hospitalization risk
Treats heart failure to cut cardiovascular death
Slows kidney function decline in chronic kidney disease
Januvia vs. Farxiga Pros and Cons
Januvia
Januvia offers a simple, weight-neutral option with a single flat dose and no boxed warning. Its tradeoff is a narrower approval: it only addresses blood sugar, not heart or kidney outcomes. Some patients experience joint pain or, rarely, pancreatitis.
Pros
No titration schedule, one steady dose
Weight-neutral compared to some other oral drugs
No boxed warning on the label
Lower risk of genital or urinary infections
Cons
Doesn't reduce heart failure or kidney disease risk
Dose must be adjusted for kidney function
Linked to severe joint pain in some patients
Rare risk of acute or necrotizing pancreatitis
Farxiga
Farxiga's clinical reach extends past blood sugar into heart failure and kidney protection, which matters for patients with those conditions. That breadth comes with genitourinary risks and a need for caution in kidney impairment. It also carries a rare but serious ketoacidosis warning.
Pros
Reduces heart failure hospitalization and death
Slows chronic kidney disease progression
Approved for children 10 and older
Only two dose strengths, simple to escalate
Cons
Higher risk of genital yeast infections
Rare risk of ketoacidosis even with normal glucose
Not recommended for significant kidney impairment
Can cause volume depletion or low blood pressure
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