Rationale: Acute caustic ingestion from suicidal intent is not usual in emergency departments in developed countries. One of the substances commonly ingested by suicidal patients, phosphoric acid, tends to cause multi-system derangements. Patient’s Concern: A 41-year-old male patient presented with complaints of throat discomfort, severe generalized abdominal pain, and multiple episodes of hematemesis after ingesting a restroom cleaning solution. Diagnosis: Poisoning by acute caustic ingestion (containing <30% phosphoric acid and <4% ethylene glycol). Interventions: The patient was administered 50 mL of 8.4% sodium bicarbonate solution followed by an isotonic sodium bicarbonate solution running at 500 mL/h, a hyperkalemia kit, ceftriaxone, metronidazole, omeprazole, and atropine. The patient then underwent urgent hemodialysis. Outcomes: The patient suffered gastrointestinal bleeding as a result of local caustic injury. In addition, his course of illness was complicated by severe acidemia from high anion gap metabolic acidosis and deranged electrolytes (hyperphosphatemia, hyperkalemia, and hypocalcemia). He developed multi-organ failure and eventually demised. Lessons: The clinician needs to be mindful of the multi-system complications arising from such a caustic ingestion. These patients need to be monitored closely for deterioration, and have prompt management of the various arising complications, to reduce the high morbidity and mortality associated with this condition.
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