Provided are methods of treating subjects in need of an anti-
fibroblast growth factor receptor 4 (anti-FGFR4) therapy. The methods comprise administering to the subjects a therapeutically effective amount of a
peroxisome proliferator-activated
receptor (PPAR) alpha
agonist in combination with the anti-FGFR4 therapy. The anti-FGFR4 therapy comprises administering to subjects an FGFR4 inhibitor comprising a compound of Formula I, a pharmaceutically acceptable salt of the compound of Formula I, a compound of Formula II, or a pharmaceutically acceptable salt of the compound of Formula II. Also provided are compositions comprising the FGFR4 inhibitor, a PPAR alpha
agonist, and, optionally, a
bile acid sequestrant. The methods attenuate the dysregulation of
bile acid biosynthesis caused by FGFR4 inhibition with anti-FGFR4 therapies. The methods reduce the severity and / or incidence of adverse events associated with anti-FGFR4 therapies.