Can you prevent HIV in the first 24 hours?

Yes, there are steps that can be taken within the first 24 hours to help prevent HIV transmission if someone has been exposed to the virus. This is known as post-exposure prophylaxis (PEP).

PEP involves taking a combination of antiretroviral medications as soon as possible after potential exposure to HIV, ideally within 2 to 3 hours, but up to 72 hours (3 days) after exposure. These medications can help prevent the virus from establishing an infection in the body.

To access PEP, it is important to seek medical attention as soon as possible after potential exposure to HIV. Emergency departments, sexual health clinics, and some primary care providers may be able to provide PEP.

The effectiveness of PEP depends on several factors, including how quickly it is started after exposure, adherence to the medication regimen, and the presence of other factors that may affect drug absorption, such as vomiting or certain medications.

PEP typically involves a combination of three antiretroviral medications, and it is important to complete the full course of treatment as prescribed by the healthcare provider to ensure its effectiveness.

It's worth noting that PEP is not a guarantee against HIV infection, but it can significantly reduce the risk of infection if started promptly and taken as directed. Additionally, using barrier methods like condoms and avoiding high-risk behaviors, such as sharing needles, can help prevent HIV transmission in the first place.