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COMSEA PHASE 1 FORM 114 – Integrated Medical Sciences: Comprehensive Exam Questions & Answers
Question 5. A patient with a true penicillin allergy (anaphylaxis) should avoid which class of antibiotics due to potential cross-reactivity? 
A. Macrolides 
B. Tetracyclines 
C. Cephalosporins 
D. Fluoroquinolones 
Correct Answer: C 
Rationale: Cephalosporins share the beta-lactam ring with penicillins, causing cross-reactivity in approximately 1–10% of penicillin-allergic patients, especially with anaphylactic reactions. 
 
 
Question 6. Which immunodeficiency disorder is characterized by t...