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A 54-year-old female asked:

My adult son has strep & is allergic to penicillen. he was on a z-pack for 4 days & still had white patches and a horrible sore throat. they just prescribed clindimyacin. the dr said he's not contagious even though the zpack didnt work. is this true?

1 doctor answer1 doctor weighed in
Dr. Hiep Le
Dr. Hiep Leanswered
Nephrology and Dialysis 44 years experience
If strep A is truly resistant to azithromycin, your son can still transmit the bacteria after 4 days of taking this antibiotic. I hope he is doing better with clindamycin.
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