We are most appreciative for the comments from Dr. Nicholas G. Kounis [1] and his colleagues regarding our recent publication describing the challenging case of anaphylactic shock in patients suffering from hypertrophic obstructive cardiomyopathy (HOCM) scheduled for surgical treatment, namely myectomy [2] Their letter raises several important concerns regarding anaphylaxis in anaesthesia and particularly in patients with HOCM. Before we address each point, we would like to mention that several topics discussed by authors were mentioned in our case report but could not be described in detail due to space limitations. In this context, several comments made by Dr. Kounis provide excellent complimentary information to our case reports.The authors of this letter have indicated that the diagnosis of anaphylaxis may be difficult while the patient is under general anaesthesia and subsequently during emerge from anaesthesia [3]. In the described case, patient presented several symptoms typical for severe anaphylactic reaction: arterial hypotension, high airway pressures, airway swelling and skin rash. Additionally, after initiating a cardiopulmonary bypass which stabilized patient hemodynamic collapse, we obtained a blood sample to test for mast cell tryptase. This approach is in agreement with current practice of diagnosing anaphylaxis during the perioperative period [3,4]. The test came positive, confirming the occurrence of severe anaphylactic reaction. Finally, after recovery following cardiac surgery, the patient was referred to an allergologist and additional skin tests confirmed a strong sensitivity to chlorhexidine.