Hi!, an 84 days test (chemiluminescence) after PEP (Truvada) is trustworthy?.
Hi there, and thanks a lot for contacting the AIDS Vancouver Helpline for your HIV/AIDS related health information. It seems you're concerned about the accuracy of an HIV test after completing a PEP regimen. We're happy to answer your question for you.

Here is a bit more information on the test you've had:

You'll see in the chart that it is considered conclusive at 3 months post exposure. When you take a PEP regimen for 1 month, the window period is also extended by 1 month (or it starts the day you stop taking PEP). A test 84 days after stopping PEP is very close to the 90 day (or 3 month) time point at which this test is considered conclusive, so the test results are a very good indicator of your present status. Guidelines state that it is considered conclusive, meaning the results should be taken as accurate, 90 days post exposure, so we'd recommend you go for another test after that 90 day point just to be sure.

Thanks a lot for contacting the AIDS Vancouver Helpline with your question, we hope it has been answered fully.


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Test Name Method Window Period Conditions
4th Generation EIA Blood test that looks for antibodies AND p24 protein antigens. Commonly referred to as the "combination," "combo" or "DUO" test. P24 protein is detectable immediately after infection but only for the first few weeks. The antibody (ab) test has a window period of 4-12 weeks post exposure. This test is widely available in North America. Most HIV specialists consider this test to be conclusive at 6 weeks but official HIV testing guidelines still recommend re-testing at 12 weeks for conclusive results. Conclusive at 3 months post exposure. |