2 doctors weighed in:

Is keflex effective for boils?

2 doctors weighed in
Dr. Joel Gallant
Internal Medicine - Infectious Disease
1 doctor agrees

In brief: Not very

By the time someone has a boil, it's generally too late for antibiotics.
A boil needs to be opened and drained. In addition, a large proportion of boils or abscesses these days are caused by mrsa, which can't be treated with keflex. Mrsa is generally treated with Bactrim (sulfamethoxazole and trimethoprim) or clindamycin, but again, drainage is the key.

In brief: Not very

By the time someone has a boil, it's generally too late for antibiotics.
A boil needs to be opened and drained. In addition, a large proportion of boils or abscesses these days are caused by mrsa, which can't be treated with keflex. Mrsa is generally treated with Bactrim (sulfamethoxazole and trimethoprim) or clindamycin, but again, drainage is the key.
Dr. Joel Gallant
Dr. Joel Gallant
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