How Effective Is Pep If Taken 24 Hours After Exposure

Here's a taste of what has to offer on this topic:
Ask the Experts

Is this combination of PEP effective?

Dear Doctors,Please help me - I am feeling very worried now. I had sex with a (probably) HIV-positive individual and 17 hours after exposure, I was prescribed these drugs and took them: Combivir + Viread (Tenofovir). However, I read that these 3...
Joseph McGowan, M.D., F.A.C.P.

Response from Joseph McGowan, M.D., F.A.C.P.

North Shore University Hospital
...acceptable combination for PEP. It is the standard treatment in New York State. That recommendation may be altered if a person is exposed to a person who is known to have HIV with a drug resistant virus. In that case the treatment would be... Read more »


Dear Rob,I recently had sex with a man i do not know, without my knowledge he removed the condom. I... Read more »

would p24 antigen be positive after 10 weeks after exposure considering I took PEP for 28 days?

I took PEP after 100 hours of exposure for 28 days. 6 weeks after my PEP course finished and which... Read more »
Rick Sowadsky, M.S.P.H.

Post-Exposure Prophylaxis (PEP) for Sexual Exposures

...primarily intended for the prevention of infection in cases where there has been a known high-risk work-related (occupational) exposure to HIV. For more information on the management of PEP for occupational exposures, please read the following... Read more »
U.S. Centers for Disease Control and Prevention

The Danish PEP Registry: Experience With the Use of Postexposure Prophylaxis (PEP) Following Sexual Exposure to HIV From 1998 to 2006

...collects data on all cases of PEP use in Denmark. During the study period, there were 374 cases in which PEP was used after sexual exposure to HIV. These cases increased from five in 1997 to 87 in 2006. In 40 percent of cases, the patients were... Read more »
AIDS Community Research Initiative of America

What is Post-Exposure Prophylaxis (PEP)? as a so-called "morning after" pill in humans exposed to HIV through sex or injection drug use (IDU). Avoiding internal exposure to HIV- infected blood, semen and vaginal fluids still remains the most effective way to remain HIV- negative.... Read more »
Project Inform

Non-Occupational Post Exposure Prevention

...Factors In Where Can You Get nPEP? Commentary Introduction If you are reading this because you've had a possible exposure to HIV within the last 72 hours and you are considering nPEP, call your doctor, an nPEP study site... Read more »