A sixty-five-year-old man with rash, fever, and generalized weakness

Area of Science:

• Internal Medicine
• Pharmacology
• Critical Care Medicine

Background:

• Diffuse erythematous rash, fever, eosinophilia, and facial edema suggest diverse etiologies including infections, allergies, or systemic diseases.
• Septic arthritis management often involves antibiotics and surgical interventions, posing risks for drug-related complications.

Observation:

• A 65-year-old male with septic arthritis on vancomycin developed sudden fever, weakness, hypotension, facial edema, rash, and wheezing.
• Laboratory findings revealed acute renal insufficiency, eosinophiluria, and peripheral eosinophilia, raising suspicion for septic shock or severe drug reaction.

Findings:

• Despite treatment for septic shock, the patient's condition worsened, prompting consideration of hypersensitivity reactions to vancomycin or piperacillin/tazobactam.
• High-dose intravenous steroids led to significant clinical improvement, suggesting an immune-mediated adverse drug reaction.

Implications:

• Adverse drug reactions can manifest with multiorgan failure, mimicking severe infections and requiring urgent diagnosis.
• Early recognition of drug-induced hypersensitivity and prompt cessation of the causative agent are vital for improving outcomes in critical care settings.