Symptoms of digoxin toxicity can be diverse and affect multiple organ systems. Common symptoms include gastrointestinal disturbances such as nausea, vomiting, and diarrhea. Cardiac symptoms may include arrhythmias, bradycardia, and heart block. Neurological symptoms such as confusion, dizziness, and visual disturbances (e.g., blurred or yellow vision) are also indicative of toxicity.