Anaphylaxis is an unanticipated systemic hypersensitivity reaction which can produce deleterious effects, even death, if not treated promptly. Preventive approach implies taking a thorough anamnesis with the emphasis on previously diagnosed allergies. If an allergic reaction occurred during previous surgery, a detailed documentation of administered anaesthetic agents and drugs would be crucial for the following anaesthesiologic management. Preoperative planning and avoiding cross-reactivity with drugs commonly used during anaesthesia are the key points to prevent an anaphylaxis. In case of emergency surgery when the exact identification of allergens is not possible, premedication prophylaxis should be considered. General measures for prevention of anaphylaxis could be undertaken as well, such as the choice of anaesthesiologic drugs and techniques in the operating theatre adequately equipped for the management of predictable anaphylaxis.