Luminous phenomena in the visual field (phosphenes), blurred vision, bradycardia, other cardiac arrhythmias, syncope, hypotension, asthenia, fatigue, headache, dizziness, nausea, constipation, diarrhoea, dyspnoea, muscle cramps, skin reactions, angioedema, hyperuricaemia, eosinophilia, elevated blood-creatinine concentrations.