The most common adverse effects seen with Ivabradine are luminous phenomena in the visual field (phosphenes). Other adverse effects include blurred vision, bradycardia, which may be severe, and other cardiac arrhythmias, nausea, constipation, diarrhoea, headache, dizziness, dyspnoea, and muscle cramps. Hyperuricaemia, eosinophilia, and elevated blood-creatinine concentrations have been reported.