Reported is the case of an anaphylactic reaction following sulindac ingestion. A 64-year-old man developed marked shortness of breath following the ingestion of a 200-mg sulindac tablet. On admission he had a palpable blood pressure of 50 mm Hg and diffuse inspiratory and expiratory wheezes on auscultation. He demonstrated marked cardiovascular instability for 24 hours following the adverse reaction. He was treated successfully with a continuous intravenous infusion of epinephrine, a corticosteroid, and an antihistamine. Recovery was complete. This case demonstrates that caution is needed in prescribing sulindac and other nonsteroidal anti-inflammatory drugs.