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A member asked:
How long should it take for an antibiotic to take effect with a sinus infection, started them monday and haven't noticed a huge difference.
A doctor has provided 1 answer
Virus vs. bacteria: Bacterial super-infection usually starts at least 5 days after a viral upper respiratory infection. Therefore, depending on how long after your symptoms started, an antibiotic would not be effective immediately. Secondly, if the nose has pus in it (usually present with a true sinusitis) that material should be cultured for bacteria and a sensitivity test will allow specific treatment.
Answered 2/8/2017
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