Digitalis toxicity can cause:
Hyperkalemia
Nausea
Arrhythmias
All of the above
Ref:KDT 6/e p498 Some early warning signs of overdose are confusion, loss of appetite, nausea, vomiting, diarrhea, or vision problems. Othersigns of overdose are changes in the rate or rhythm of the heabeat (becoming irregular or slow), palpitations (feeling of pounding in the chest), or fainting.
Cardiovascular system