Used primarily as an antiretroviral medication for the treatment of HIV-1 infection. It functions as a non-nucleoside reverse transcriptase inhibitor (NNRTI), preventing the virus from replicating within the body. Often prescribed in combination with other antiretroviral drugs to enhance efficacy and reduce the risk of drug resistance. It is a key component in first-line therapy for managing HIV, particularly in resource-limited settings due to its cost-effectiveness. Additionally, it is used in preventing mother-to-child transmission of HIV during childbirth when other treatments are not suitable. Regular monitoring is required to manage potential side effects, such as liver toxicity or skin reactions.