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A 41-year-old female asked:

How long does it take for a penicillin injection to clear up acute pharyngitis + ear infection . does the injection guarantee to clear up my symptoms?

1 doctor answer2 doctors weighed in
Dr. Natalie Hodge
Pediatrics 27 years experience
48 to 72 hours: By the second day you should be a bit better, and much better by the third. The shot will only be helpful if you have a strep throat as an etiology. If your sore throat is viral this shot will not help.
Last updated Oct 21, 2014

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