After taking SMZ-TMP, a patient experiences a burning sensation. Which assessment should the nurse perform to evaluate a possible adverse reaction?

• A. Auscultate lung sounds for wheezing
• B. Inspect the mouth for ulcers
• C. Check skin turgor
• D. Measure urinary output

Answer: (A)

When a patient experiences a burning sensation after taking an antibiotic like sulfamethoxazole-trimethoprim, the priority is to assess for an allergic reaction that could affect the airway. Bronchospasm from a hypersensitivity reaction can cause wheezing, which signals potential respiratory compromise that requires immediate action. Therefore, auscultating the lungs for wheezes directly evaluates whether the reaction is involving the airway and helps determine the need for urgent intervention.

Inspecting the mouth for ulcers could reveal mucous membrane irritation, but it doesn’t assess airway status. Checking skin turgor and urinary output relate to hydration and renal function, not the acute respiratory risks of an allergic reaction.