Used primarily in the treatment of HIV infection, it works by inhibiting the reverse transcriptase enzyme, which is crucial for the replication of the virus. It is often included in combination antiretroviral therapy (ART) to enhance efficacy and reduce the risk of developing drug resistance. Its use helps in lowering the viral load in patients, improving immune system function, and slowing the progression of HIV to AIDS. It is particularly beneficial for patients who have not responded well to other antiretroviral medications. Regular monitoring is essential to manage potential side effects and ensure optimal therapeutic outcomes.