What drug is prescribed for HIV prophylaxis?

Tenofovir/emtricitabine is the correct choice for HIV prophylaxis because it is an established medication used in pre-exposure prophylaxis (PrEP) to prevent HIV infection in individuals at high risk. When taken consistently, this combination effectively reduces the risk of acquiring HIV through sexual contact or injection drug use.

Tenofovir is a nucleotide reverse transcriptase inhibitor, while emtricitabine is a nucleoside reverse transcriptase inhibitor. Together, they work to suppress the replication of the virus should exposure occur, making them an effective preventive measure. PrEP has been supported by numerous studies and public health guidelines as a vital tool in the fight against HIV/AIDS.

The other drugs listed have different roles. Rilpivirine is primarily used in the treatment of HIV, not for prophylaxis. Darunavir is also an antiretroviral medication used in the treatment of HIV. Abacavir is a treatment option for HIV/AIDS but does not have specific recommendations for use in prophylactic contexts like tenofovir/emtricitabine does.