Fluorofenidone (AKF-PD), an analogue of AMR69, shows equivalent antifibrotic activity, lower toxicity and longer half-life. Fluorofenidone (AKF-PD) attenuates the progression of renal interstitial fibrosis partly by suppressing NADPH oxidase and extracellular matrix (ECM) deposition via the PI3K/Akt signalling pathway.