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How Effective Is Pep If Taken 24 Hours After Exposure

Here's a taste of what has to offer on this topic:
Get the Facts
AIDS InfoNet

Treatment After Exposure to HIV

What Is Post-Exposure Prophylaxis? Who Should Use PEP? Should PEP Be Used for Non-Occupational Exposure? How Is PEP Taken? What Are the Side Effects? The Bottom Line For More Information What Is Post-Exposure Prophylaxis? Prophylaxis means disease prevention. Post-exposure prophylaxis (or PEP) means taking antiretroviral medications (ARVs) as soon as possible after exposure to HIV, so that the exposure will not result in HIV...
Ask the Experts

Pep efficacy after 2 hours of exposure

Is pep Less effective if taken more than two hours after exposure?I keep reading on different sites that pep should be initiated within the first two hours following the exposure.I started pep at 13 hours... Would that decrease its efficacy as...
Benjamin Young, M.D., Ph.D.

Response from Benjamin Young, M.D., Ph.D.

Rocky Mountain CARES
Hello and thanks for posting.PEP should be started within 72 hours of exposure. While it makes sense that the sooner you start, the better, there's no scientific evidence or clinical trials that answers this question.Since you started at 13... Read more »

PEP effectiveness at 39 hours

How effective is PEP if started at 39 hours after exposure? I heard it is recommended to be taken within 36 hours. I was 3 hours late. ...
David Wohl, M.D.

Response from David Wohl, M.D.

University of North Carolina - Chapel Hill
There is no hard and fast rule or cut off regarding PEP. Animal studies show the sooner the better. After 3 days or so probably no benefit. So, in reality it is impossible to say that starting at 39 hours is much worse than 36 hours.DW... Read more »

How effective is PEP started 60 hours after exposure?

I had bareback sex with a man who I found out was HIV positive, but he said he had a low viral load and high counts of CD-4. I don't know whether to trust this though. I put off getting PEP because I was too scared I'd be judged by my...
Benjamin Young, M.D., Ph.D.

Response from Benjamin Young, M.D., Ph.D.

Rocky Mountain CARES
Hello and thanks for your post.Just because you don't have any side effects doesn't mean that the medications that you're taking aren't working. Indeed, many persons who take HIV meds (including those who are taking them for... Read more »

Potential Exposure 8 Hours Ago - PEP??

Dear Doctors, I'm rather worried about a potential HIV exposure that occurred roughly 8 hours ago with someone I met online. I was the receptive (male) partner, and found that the condom we used broke, and therefore that I had unknowingly...
Joseph McGowan, M.D., F.A.C.P.

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

North Shore University Hospital
PEP should be used if there was a potential exposure to HIV. The risks and benefits must be weighed. Generally, I would recommend prophylaxis in the setting your described. Treatment should start as soon as possible after the exposure (preferably... Read more »
Connect With Others

Post-Exposure Prophylaxis (PEP) - Help

Posted by MF2010
Hi all,

I've been exposed to HIV in the beginning of this month.
My condom completely broke and i had sex for a couple of minutes completely exposed. I suspect my partner was HIV infected.

Went straight to the hospital and started Post-Exposure... Read more »

New Topic: Has anyone ever taken PEP?

Posted by anxietyboy
Has anyone ever received Post Exposre Prophylaxis, for either a occupational or non-occupational exposure to HIV???

Read more »


Posted by je5872, 2 Replies
has anyone ever taken PEP. I began taking PEP 4 hrs post exposure. I was top with hiv+ guy on no meds when condom broke. i immediately washed and urinated. Has anyone had this experince? do they feel the PEP was effective? Read more »

Exposure -PEP?

Posted by Crombie34, 1 Reply
Was exposed today - bottomed for a guy who turns out is HIV positive/undetectable. He came inside me. Should I see my doctor for PEP? Read more »