High Quality Content by WIKIPEDIA articles! Digoxin toxicity is a poisoning that occurs when excess doses of digoxin (from plants of the genus Digitalis) are consumed acutely or over an extended period. The classic features of digoxin toxicity are nonspecific: fatigue, blurred vision, change in color vision (eg. "yellow" vision"), anorexia, nausea, vomiting, diarrhea, abdominal pain, headache, dizziness, confusion, delirium.