A -year-old female teacher comes to the primary care office complaining of severe throat pain and a fever that began abruptly yesterday. She notes difficulty swallowing but denies having a cough or rhinorrhea. Her temperature is (), blood pressure is , and pulse is . Physical examination reveals marked pharyngeal erythema, bilateral tonsillar exudates, and tender anterior cervical lymphadenopathy. A rapid antigen detection test is positive for Streptococcus pyogenes (Group A Streptococcus). The patient has no known drug allergies. Which of the following is the most appropriate next step in pharmacologic management?
- Prescribe oral penicillin VAnswer
- BPrescribe oral amoxicillin-clavulanate
- CPrescribe oral azithromycin
- DPrescribe oral levofloxacin
- EAdminister intravenous ceftriaxone
Answer
The most appropriate pharmacologic management for this patient is to prescribe oral penicillin V.
The correct option identifies the optimal narrow-spectrum antibiotic therapy. Group A Streptococcus (GAS) is universally susceptible to beta-lactam antibiotics. In a patient with no reported medication allergies, oral penicillin V (or oral amoxicillin) is the established standard first-line treatment. This targeted approach efficiently eradicates the organism, shortens the duration of symptoms, prevents the serious complication of acute rheumatic fever, and aligns perfectly with the principles of antimicrobial stewardship by strictly avoiding unnecessarily broad coverage.
Step-by-Step Solution
Key Concept
The standard first-line treatment for Group A Streptococcal pharyngitis in a patient without medication allergies is a narrow-spectrum penicillin or amoxicillin to ensure clinical efficacy while maintaining proper antibiotic stewardship.