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How long does it take for Farxiga to work?

Medically reviewed by Last updated on May 18, 2020.

Official Answer


Farxiga (dapagliflozin) is a sodium-glucose cotransporter 2 (SGLT2) inhibitor that is used for the treatment of type 2 diabetes and heart failure.

In patients with type 2 diabetes, Farxiga works by stopping glucose being reabsorbed back into the body via the kidneys, which leads to more glucose being excreted when a person urinates.

After a Farxiga tablet is swallowed, it is rapidly absorbed by the body and maximum blood plasma concentrations of the drug are reached within 2 hours. Clinical trial results show that the amount of glucose removed via urine increases after just one dose. However, it takes multiple doses of once-daily Farxiga to decrease a patient's blood glucose or sugar levels. It may take a week for Farxiga to take full effect.

In patients with heart failure, Farxiga works by increasing the amount of sodium in an area of the kidneys called the distal tubule. This is linked to its mechanism of action - the way it works - in patients with diabetes. When the drug inhibits SGLT2 it stops the sodium-powered process that allows the body to reabsorb glucose. While the glucose is left to be excreted in the urine, the salt goes to work in the distal tubule to reduce the risk of cardiovascular death and hospitalization in patients with symptomatic heart failure by making it easier for the heart to work.

  • Kasichayanula S, Liu X, Lacreta F, et at. Clinical pharmacokinetics and pharmacodynamics of dapagliflozin, a selective inhibitor of sodium-glucose co-transporter type 2. Clin Pharmacokinet. 2014 Jan;53(1):17-27. doi: 10.1007/s40262-013-0104-3.
  • Food and Drug Administration (FDA). Farxiga. Highlights of Prescribing Information. [Accessed May 18, 2020]. Available online at:
  • Komoroski B, Vachharajani N, Feng Y, et al. Dapagliflozin, a novel, selective SGLT2 inhibitor, improved glycemic control over 2 weeks in patients with type 2 diabetes mellitus. Clin Pharmacol Ther. 2009 May;85(5):513-9. doi: 10.1038/clpt.2008.250. Epub 2009 Jan 7.
  • NHS. Dapagliflozin. [Accessed May 18, 2020]. Available online at:

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