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Naples, FL
A 29-year-old female asked:

dr prescribed antibiotics (keflex) for possible secondary infection from flu. been on them for 2 days and now feel worse?! is that normal?

1 doctor answer1 doctor weighed in
Dr. Brian Clear
A Verified Doctoranswered
A US doctor answeredLearn more
Well that depends: The awfulness of influenza usually peeks around day 2-3 of symptoms and persists for a good 5-7 days. So if your flu is just reaching it's normal peak, then yes, I'd say your worsening is expected. If you're past that peak though, worsening would not be expected. If the concern is a secondary pneumonia or bacterial sinusitis following flu, keflex is not a standard treatment for either.

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Last updated Feb 3, 2016

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