Hyperglycaemia — elevated blood glucose (sugar) Syncope Seizure Dysarthria sinus bradycardia Bundle branch block QTc interval prolongation (has a relatively low risk for causing QTc interval prolongation.[13][14]) sinus tachycardia Orthostatic hypotension Hypotension Swollen tongue Dysphagia (difficulty swallowing) Glossodynia Oral paraesthesia