Tirai is a combination antiviral medication that is primarily used to treat human immunodeficiency virus (HIV) infection. This medication is an antiviral medication used to treat type 1 human immunodeficiency virus (HIV) infection. It is usually taken alone or in combination with other antiretroviral drugs, and its medication includes 3 main antiretroviral drugs, efavirenz, emtricitabine, and tenofovir. This drug is mainly used for the treatment of HIV infection, which is commonly known as AIDS, and needs to be taken for life for AIDS patients, or can be dynamically adjusted by detecting the number of immune cells and the level of viral vectors during the course of taking the drug. This drug has a certain degree of hepatotoxicity and nephrotoxicity, so it is not suitable for people with liver and kidney function impairment. In addition, it may induce bone density loss and lactic acidosis, so you need to pay attention to your health condition while taking the drug. This drug should be used in strict compliance with medical advice, if intolerance or drug resistance occurs, you need to find a doctor to make adjustments in a timely manner, so as to avoid the failure to inhibit the reproduction of the virus in a timely manner, resulting in the onset of AIDS, and to increase the risk of other opportunistic pathogenicity.