A 16-year-old student presents to a walk-in clinic with 4 days of severe sore throat of sudden onset and fever. There is no cough, rhinorrhea, or hoarseness. She had anaphylaxis (hives, wheezing, and hypotension) after taking amoxicillin at age 6 and has had no other reactions since; she takes no medications and weighs 58 kg. On examination, she has tender anterior cervical lymphadenopathy and an erythematous pharynx with white exudate on both tonsils. A rapid antigen detection test for group A Streptococcus is positive.
| Heart rate | 98/min |
| Respiratory rate | 16/min |
| Temperature | 38.9 °C |
| O2 saturation | 99%, room air |
| Blood pressure | 112/70 mm Hg |
Question 1 of 6
Which one of the following is the most appropriate antibiotic for this patient?
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