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|Post-Exposure Prophylaxis|

is a pill regimen that prevents you from contracting HIV AFTER an exposure. 

If you have had a recent exposure to HIV, or had condom-less sex with someone who is HIV-positive of unknown viral load status or whose status you do not know, in the last 72 hours -

Call: 510-646-1350 immediately. 

If outside of 9-5pm - visit your local Emergency Room. 




Note: The sooner you begin PEP in the 72-hour window after a possible exposure - the more effective PEP is. 

In some instances, PEP can be warranted after the 72-hour window. If you are concerned about a recent exposure to HIV, regardless where you are in the window -  contact us immediately.




  • PEP is time sensitive and should be taken as soon as possible after an exposure.

  • You have a 72-hour (3-day) window after an exposure to take PEP (but the sooner the better).

  • PEP is not 100% effective, but if it is started within 72 hours of a potential HIV exposure, it can greatly reduce your risk of contracting HIV.

  • PEP involves taking HIV medication (three to four drugs, often in one pill) for 28 days AFTER a high risk HIV exposure in order to prevent HIV infection.

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