Key takeaways:
Farxiga (dapagliflozin) is an oral medication used to treat Type 2 diabetes in adults and children ages 10 and older. It’s also FDA approved to treat heart failure and chronic kidney disease (CKD) in adults.
The usual Farxiga dosage for Type 2 diabetes in adults and children is 5 mg to 10 mg once a day in the morning. The typical dosage for heart failure or CKD is 10 mg once a day in the morning.
Your kidney function and the condition you’re taking the medication for impact whether you can safely take Farxiga. You may also be asked to temporarily stop taking Farxiga if you’re fasting before a surgical procedure.
There are several ways to save on Farxiga. GoodRx can help you access Farxiga at an exclusive cash price of $288. Manufacturer savings cards and patient assistance programs are also available.
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Farxiga (dapagliflozin) is one of several sodium-glucose cotransporter-2 (SGLT2) inhibitors on the market. It’s FDA approved for Type 2 diabetes, heart failure, and chronic kidney disease (CKD). It can also help lower the risk of heart-related problems for certain people with diabetes. While taken by mouth for each approved use, Farxiga’s dosages can vary depending on why you’re taking it.
It’s always best to follow your prescriber’s guidance when it comes to taking your medications. But it’s also helpful to have basic instructions to reflect on after you get home with your prescription. Below, we’ll detail the typical Farxiga dosages for adults and children.
What’s the typical Farxiga dosage for adults?
The typical Farxiga dosage is to take 1 tablet by mouth once daily. Farxiga comes available as 5 mg and 10 mg tablets. The specific dose you take depends on the condition you’re taking the medication for.
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Regardless of which dose you take, you can take it with or without food. But it’s best to take Farxiga in the morning. That’s because it can cause you to urinate more often in the hours after you take it. Taking it in the morning helps prevent you from waking up overnight to use the bathroom.
Below are details for the recommended dosages for each of Farxiga’s FDA-approved uses.
Adult Farxiga dosage for Type 2 diabetes
The typical starting Farxiga dosage for Type 2 diabetes is 5 mg by mouth once a day. If this doesn’t work well enough for you, your prescriber may raise your dosage to 10 mg once a day. This is also the maximum dosage for Farxiga.
Adult Farxiga dosage for heart failure, CKD, or cardiovascular risk reduction
The typical Farxiga dosage for heart failure, CKD, or cardiovascular risk reduction is 10 mg by mouth once a day. This is both the starting and maximum dosage. Unlike when taking it for diabetes, there’s no recommended dose increase for these approved uses. You’ll likely stick with the same Farxiga dosage the entire time you take it.
What’s the typical Farxiga dosage for children?
Farxiga is one of the few treatment options for children living with Type 2 diabetes. To treat diabetes, it's approved for kids and adolescents ages 10 and older.
The typical Farxiga dosage for children is the same as for adults. Your child will likely start with 5 mg by mouth once daily in the morning. If needed, their prescriber may raise their dosage to 10 mg per day. This is also the maximum Farxiga dosage for children.
Are there any dosage adjustments for health conditions?
There aren’t any standard Farxiga dosage adjustments for people with certain health conditions. But there may be times when it’s not recommended to take it. Always follow your prescriber’s instructions if they tell you to stop taking Farxiga.
People with kidney problems
Farxiga can help prevent complications related to CKD. But there are times when people with kidney problems should take extra precautions when it comes to this medication.
Farxiga primarily works in the kidneys. If your kidneys aren’t working as well as expected, it may not lower your blood sugar (glucose) much or at all. If you have moderate or severe kidney problems, you shouldn’t take Farxiga if you’re only taking it to help lower your blood sugar.
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Does Farxiga cause weight loss? Check out the answer to this and other frequently asked questions about Farxiga.
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But if you’re taking Farxiga for heart failure, CKD, or cardiovascular risk reduction, you can continue taking your typical dosage. Studies have found that Farxiga provides heart and kidney protection for people with moderate or severe kidney problems. It’s just not recommended to start Farxiga if you have severe CKD.
Before starting Farxiga, your prescriber will likely check your kidney function. They should also check it from time to time while you’re taking it. This will help them determine if it’s safe for you to start or continue taking Farxiga.
People who are fasting
It’s recommended to temporarily stop taking Farxiga for at least 3 days if you’re fasting before a surgical procedure or preparing for a major surgery, such as heart surgery. This is because fasting can raise your risk of a life-threatening side effect called diabetic ketoacidosis (too much acid in the blood).
Make sure all your prescribers and surgeons know if you’re taking Farxiga. They can tell you if and when you should stop the medication and when to restart it after your procedure. If you’re fasting for reasons other than surgery, contact the healthcare professional that prescribes your Farxiga. They can let you know if this guidance applies to your situation.
What happens if you miss a dose of Farxiga?
If you miss a dose of Farxiga, take it as soon as you remember. But if it’s close to your next scheduled dose, skip the missed tablet. Take your next dose when you usually would. You may also want to avoid taking a missed Farxiga dose if it’s later in the day to avoid waking up to urinate overnight. You shouldn’t take two doses at the same time because it may cause more side effects.
What should you do if you take too much Farxiga?
If you take too much Farxiga, you may experience more side effects. Most commonly, you may have a greater urge to urinate than you usually do after taking a dose. This can potentially raise your risk of dehydration and infections of the genitals or urinary tract.
Taking too much Farxiga also raises your risk of low blood sugar (hypoglycemia). Farxiga has a low risk of hypoglycemia when taken as directed. But extra doses may make this side effect more likely.
If you think you’ve taken too much Farxiga, contact your prescriber to discuss next steps. You can also contact Poison Control online or at 1-800-222-1222 for guidance. If any side effects feel severe or life threatening, go to the nearest ER.
How to save on Farxiga
There are ways to save on Farxiga, which is available as a brand-name medication and authorized generic. GoodRx can help you navigate between GoodRx coupons, copay savings cards, and patient assistance programs to save money on your prescription.
Save with GoodRx: Anyone with a valid prescription, regardless of insurance status, can use GoodRx to purchase a 30-day supply of Farxiga at an exclusive cash price of $288. GoodRx can also help you save over 50% off the retail cost of the generic version.
Save with a copay savings card: If you have commercial insurance, you may be eligible to pay as little as $0 per month for Farxiga using a savings card from the manufacturer.
Save with patient assistance programs: If you’re uninsured or underinsured, you may be eligible for Farxiga’s patient assistance program, which offers the medication free of charge.
Frequently asked questions
If you stop taking Farxiga, the symptoms of your condition may worsen or return. If you’re taking Farxiga for diabetes, your blood sugar and hemoglobin A1C (your average blood sugar over the past 3 months) will likely increase. If you’re taking it for heart failure, CKD, or cardiovascular risk reduction, your risk of complications may go up.
Farxiga is a chronic (long-term) medication. Its benefits only continue as long as you’re taking it.
It’s important to stay well hydrated while taking Farxiga, since it can make you have to urinate more than usual. But most people don’t need to monitor the amount of fluid they drink. A good rule to follow is to take a drink when you feel thirsty. Following this tip usually helps most people maintain proper hydration.
If you have heart failure, check with your healthcare team about how much water you should drink. People with this condition may have to limit the amount of water or other fluids they consume. Drinking too much fluid can worsen heart failure.
Small amounts of Farxiga may stay in your system for about 2 to 3 days. That’s why it’s sometimes recommended to temporarily stop taking Farxiga 3 days before major surgical or medical procedures where you may be fasting. This window gives your body time to fully clear Farxiga before you need to fast.
Most people can still have moderate amounts of caffeine while taking Farxiga. So it’s likely fine for you to keep drinking your morning coffee. But caffeine can make you have to pee. This can worsen one of Farxiga’s most common side effects. Large amounts of caffeine can also raise blood sugar. This can make it harder for Farxiga to work well for diabetes. If you consume more than 1 to 2 cups of coffee or other caffeinated beverages per day, speak with your prescriber. They may suggest reducing your daily caffeine intake.
If you stop taking Farxiga, the symptoms of your condition may worsen or return. If you’re taking Farxiga for diabetes, your blood sugar and hemoglobin A1C (your average blood sugar over the past 3 months) will likely increase. If you’re taking it for heart failure, CKD, or cardiovascular risk reduction, your risk of complications may go up.
Farxiga is a chronic (long-term) medication. Its benefits only continue as long as you’re taking it.
It’s important to stay well hydrated while taking Farxiga, since it can make you have to urinate more than usual. But most people don’t need to monitor the amount of fluid they drink. A good rule to follow is to take a drink when you feel thirsty. Following this tip usually helps most people maintain proper hydration.
If you have heart failure, check with your healthcare team about how much water you should drink. People with this condition may have to limit the amount of water or other fluids they consume. Drinking too much fluid can worsen heart failure.
Small amounts of Farxiga may stay in your system for about 2 to 3 days. That’s why it’s sometimes recommended to temporarily stop taking Farxiga 3 days before major surgical or medical procedures where you may be fasting. This window gives your body time to fully clear Farxiga before you need to fast.
Most people can still have moderate amounts of caffeine while taking Farxiga. So it’s likely fine for you to keep drinking your morning coffee. But caffeine can make you have to pee. This can worsen one of Farxiga’s most common side effects. Large amounts of caffeine can also raise blood sugar. This can make it harder for Farxiga to work well for diabetes. If you consume more than 1 to 2 cups of coffee or other caffeinated beverages per day, speak with your prescriber. They may suggest reducing your daily caffeine intake.
The bottom line
The typical Farxiga (dapagliflozin) dosage for people ages 10 and older with Type 2 diabetes is 5 mg to 10 mg by mouth once a day in the morning. The typical dosage for heart failure, chronic kidney disease, and cardiovascular risk reduction is 10 mg by mouth once a day. The maximum Farxiga dosage for all uses is 10 mg per day.
If you have moderate or severe kidney problems, Farxiga may not be the best choice if you’re only taking it to help lower blood sugar (glucose). Your prescriber might suggest temporarily stopping the medication if you’re prepping for a major surgery.
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References
American Diabetes Association Professional Practice Committee. (2025). Children and adolescents: Standards of care in diabetes—2025. Diabetes Care.
AstraZeneca Pharmaceuticals LP. (2023). Farxiga - dapagliflozin tablet, film coated [package insert].
Dekkers, C. C. J., et al. (2018). Effects of the sodium–glucose co-transporter 2 inhibitor dapagliflozin in patients with type 2 diabetes and Stages 3b–4 chronic kidney disease. Nephrology Dialysis Transplantation.
Heerspink, H. J. L., et al. (2020). Dapagliflozin in patients with chronic kidney disease. The New England Journal of Medicine.
MedlinePlus. (2025). Dapagliflozin.
Padda, I. S., et al. (2023). Sodium-glucose transport protein 2 (SGLT2) inhibitors. StatPearls.
PubChem. (2025). Dapagliflozin. National Library of Medicine.
