Farxiga Dosages for Adults: Your GoodRx Guide

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 healthcare provider’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.

Note: Farxiga isn’t approved for use in children or teens. So we won’t cover dosage information for people under 18 years old.

What’s the typical Farxiga dosage for adults?

Farxiga comes available as 5 mg and 10 mg tablets that you take by mouth once a day. It can be taken 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.

Specific Farxiga dosages vary depending on why you’re taking it. 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 healthcare provider may raise your dosage to 10 mg once a day.

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The typical Farxiga dosage for heart failure and CKD is 10 mg by mouth once a day. 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.

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 healthcare provider’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.

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Farxiga primarily works in the kidneys. If your kidneys aren’t working as well as expected, it may not lower your blood glucose (sugar) 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 glucose.

But if you’re taking Farxiga for heart failure or CKD, 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 provider 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 providers 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 provider 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 glucose (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 healthcare provider 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 your nearest emergency room.

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.

• Save with a copay savings card: If you have commercial insurance, you may be eligible to pay as little as $0 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.

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Written by:

Timothy Aungst, PharmD

Timothy Aungst, PharmD, has worked in pharmacy practice for the past decade with different roles and responsibilities. He has served as an associate professor of pharmacy practice for almost a decade, a clinical pharmacist in outpatient cardiology management, and now in home healthcare.

Edited by:

Christina Aungst, PharmD

Christina Aungst, PharmD, is a pharmacy editor for GoodRx. She began writing for GoodRx Health in 2019, transitioning from freelance writer to editor in 2021.

Reviewed by:

Joshua Murdock, PharmD, BCBBS

Joshua Murdock, PharmD, BCBBS, is a licensed pharmacist in Arizona, Colorado, and Rhode Island. He has worked in the pharmacy industry for more than 10 years and currently serves as a pharmacy editor for GoodRx.

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