Kounis Syndrome: An Entity One Should Not Forget.

Kounis syndrome is an underreported diagnosis, even though it is a frequent pathology. It is an acute coronary syndrome that can present in the setting of an allergic or an anaphylactic reaction that could be triggered by the use of drugs. We present the case of a patient with a known medical history of drug allergies (but not of anaphylaxis), who presented to the emergency department with complaints of headache. After the administration of a painkiller, she developed hypotension, syncope, elevation of troponin, and transitory changes in the ST segment of the electrocardiogram.