A member asked:

How effective is pep (post exposure prophylaxis) medication? i have read that old mono-therapies were around 80% effective. what about new treatments?

A doctor has provided 1 answer
Dr. Hunter Handsfield answered

Specializes in Infectious Disease

Very effective: There are no research studies to document the actual effectiveness of PEP. (It would be ethically impossible to research this by giving some people real PEP and comparing to untreated people on placebo.) Based on animal research and clinical experience, current multi-drug PEP is believed to be nearly 100% effective if started promptly. Effectiveness is less certain after 24-48 hours

Answered 11/23/2015



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