Anaphylaxis is a life-threatening response to various types of allergens. Early recognition and management are crucial for reducing mortality. This case report highlights a 31-year-old male with a background of hypertension who presented to the emergency department with nausea, vomiting, right flank pain, headache, and elevated blood pressure (BP) of 212/134 mmHg. The patient was started on stat captopril 12.5 mg tablet and stat amlodipine 5 mg tablet for his high BP and stat diclofenac 75 mg (1 mg/kg) intramuscular (IM) for his flank pain. Two minutes later the patient started developing swelling of his mucosal membranes with no urticaria or rashes and his BP suddenly dropped and was unrecordable. First-line management was immediately initiated including the administration of two standard adult doses of IM epinephrine of 500 mcg each with a 5-minute interval. The BP remained undetectable; accordingly, a third IM epinephrine dose of 500 mcg was administered along with an intravenous (IV) epinephrine drip initiated at a rate of 4 mcg/min. The BP became 60/40 mmHg but kept dropping, thus an IV epinephrine bolus of 300 mcg (4 mcg/kg) was given along with the ongoing IV epinephrine drip. BP increased to 126/75 mmHg. While on the IV epinephrine drip the BP dropped again to 88/59 mmHg, a second IV epinephrine bolus of 200 mcg (2.6 mcg/kg) was given and the BP became 140/90 mmHg and recovery was achieved. Emergency cases require immediate recognition and intervention. Currently, IM epinephrine is the primary treatment for anaphylaxis. We hope our case report contributes to the database on severe refractory anaphylaxis by discussing a successful case where IV bolus epinephrine was used to prevent imminent cardiovascular collapse. Highlighting the need for appropriate escalation of management given the availability of physicians with expertise.
Keywords: allergy; anaphylactic shock; bolus intravenous epinephrine; clinical case report; life-threatening anaphylaxis.
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