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A member asked:

Can you tell me how long to see the effects of an antibiotic on a bacterial infection?

2 doctors weighed in across 2 answers

Days: It takes several days for antibiotics to begin counter acting an infection.

Answered 12/10/2013

5.1k views

Thank
Dr. Michael Ein answered

Specializes in Infectious Disease

See below: It depends on the type of infection and the species of bacteria involved. Many bacterial infections that are of recent onset will respond within a few days of the start of an effective antibiotic.

Answered 2/9/2019

5k views

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