A 16-year-old boy comes to clinic with chief complaint of sore throat for 3 days. Denies fever or chills. PMH negative for recurrent colds, influenza, ear infections or pneumonia's. NKDA or food allergies. Physical exam reveals temp of 99.6 F, pulse 78 and regular with respiration's of 18. HEENT normal with exception of reddened posterior pharynx with white exudate on tonsils that are enlarged to 3+. Positive anterior and posterior cervical adenopathy. Rapid strep test performed in office was positive. His HCP wrote a prescription for amoxicillin 500 mg po q 12 hours x 10 days disp #20. He took the first capsule when he got home and immediately complained of swelling of his tongue and lips, difficulty breathing with audible wheezing. 911 was called and he was taken to the hospital, where he received emergency treatment for his allergic reaction.