Anaphylactic reaction towards antibiotics is common during anaesthesia. It may present as bronchospasm, hypotension, desaturation, or urticarial. However it is uncommon for anaphylaxis reaction to present only as supraventricular tachycardia (SVT). This is a rare interesting case report on a 23-year-old healthy man whose anaesthetic categorization is American Society of Anaesthesiologist (ASA) 1, developed supraventricular tachycardia (SVT) towards intravenous cefuroxime, peri operatively. His condition resolved with carotid sinus massage. No pharmacological interventions were used. His skin prick intradermal tests showed allergies towards cefuroxime, cefazoline and cefoperazone. The patient subsequently underwent.