Farxiga vs. Phentermine
See how Farxiga and Phentermine compare on approved uses, dosing, side effects, and cost.
Key Takeaways
Farxiga is approved for long-term management of type 2 diabetes, heart failure, and chronic kidney disease, while phentermine is approved only for short-term weight loss.
Farxiga's main risks are genital yeast infections and dehydration, while phentermine carries risks of elevated heart rate, blood pressure, and dependence.
Farxiga is a non-controlled daily tablet costing far more per month than generic phentermine, a Schedule IV stimulant.
Farxiga vs. Phentermine Drug Summary
Farxiga
Farxiga (dapagliflozin) is an SGLT2 inhibitor that lowers blood sugar by causing the kidneys to remove excess glucose in the urine. It is FDA-approved for type 2 diabetes, heart failure, and chronic kidney disease, and is taken as one tablet by mouth once a day.
Phentermine
Phentermine is a sympathomimetic amine that suppresses appetite by acting on the central nervous system in a way similar to amphetamines. It is FDA-approved only for short-term weight loss alongside diet and exercise, and is taken as one tablet or capsule by mouth once a day.
Farxiga vs. Phentermine Side Effects
Farxiga
Phentermine
Farxiga vs. Phentermine Dosage
Farxiga
Phentermine
| 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 |
| STAGE | DOSE | WHEN |
| Starting dose | 15 mg once daily | At the start |
| Maximum dose | 37.5 mg once daily | If needed |
| Dose changes | 1 increase | 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 |
Phentermine
| STAGE | DOSE | WHEN |
| Starting dose | 15 mg once daily | At the start |
| Maximum dose | 37.5 mg once daily | If needed |
| Dose changes | 1 increase | As tolerated |
Farxiga vs. Phentermine Indications
Farxiga
Farxiga is approved to control blood sugar in adults and children 10 and older with type 2 diabetes. It also reduces the risk of hospitalization for heart failure and slows kidney function decline in chronic kidney disease, independent of diabetes status.
Type 2 diabetes blood sugar control (ages 10+)
Heart failure hospitalization and mortality risk reduction
Chronic kidney disease progression risk reduction
Not approved for type 1 diabetes or weight loss
Phentermine
Phentermine is approved as a short-term adjunct, meant for only a few weeks, for weight reduction in adults with obesity or with a lower BMI plus other risk factors. It is meant to be combined with reduced-calorie diet, exercise, and behavior changes, not used alone or long-term.
Short-term weight loss adjunct (a few weeks only)
For BMI 30+ or BMI 27+ with other risk factors
Used with diet, exercise, and behavior modification
Not approved for long-term weight management
Farxiga vs. Phentermine Pros and Cons
Farxiga
Farxiga is a non-addictive daily pill approved for long-term use across four serious conditions, with cardiovascular and kidney benefits beyond blood sugar control. It is not approved for weight loss, though modest weight loss can occur as a side effect.
Pros
Approved for diabetes, heart failure, and kidney disease
Safe for long-term daily use, not a controlled substance
Also approved for pediatric type 2 diabetes (ages 10+)
No abuse or withdrawal risk
Cons
Risk of genital yeast infections and UTIs
Rare but serious risk of Fournier's gangrene
Not approved for weight loss on its own
Roughly $400 to $785 per month without insurance
Phentermine
Phentermine works quickly to reduce appetite but is only approved for a few weeks of use, reflecting its stimulant effects and dependence risk. It has been prescribed for decades and remains one of the least expensive weight-loss medications available.
Pros
Fast-acting appetite suppression
Decades of clinical use and prescribing experience
Roughly $15 to $75 per month without insurance
Simple once-daily dosing
Cons
Approved for only a few weeks of use, not long-term
Schedule IV controlled substance with abuse potential
Can raise heart rate and blood pressure
Withdrawal effects possible after prolonged high doses
Common Symptoms and Related Diseases You Can Explore
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