Digitalis glycosides Signs of toxicity:

Anorexia (often the earliest sign) Nausea, vomiting, and diarrhea Headache, fatigue, malaise, neuralgias, and delirium Vision changes, including abnormal color perception Cardiac effects: premature ventricular contractions (PVCs) and ventricular tachycardia and fibrillation; A-V dissociation and block; sinus arrhythmia and S-A block