An often described, but

An often described, but rarely seen, adverse effect of digoxin is a disturbance of color vision (mostly yellow and green) called xanthopsia. Vincent van Gogh’s «Yellow Period» may have somehow been influenced by concurrent digitalis therapy. Other oculotoxic effects of digoxin include generalized blurry vision, as well as seeing a «halo» around each point of light. The latter effect can also be seen in van Gogh’s Starry Night. Evidence of van Gogh’s digoxin use is supported by multiple self-portraits that include the foxglove plant, from which digoxin is obtained. (e.g. Portrait of Dr. Gachet)