FUZEON, also known by its generic name enfuvirtide, is a type of antiretroviral medication used in the treatment of HIV/AIDS. It belongs to a class of drugs known as fusion inhibitors, which work by preventing the HIV virus from entering and infecting healthy cells in the body. FUZEON is specifically designed for use in combination with other antiretroviral medications as part of a comprehensive treatment regimen for individuals who have previously received extensive HIV treatment and have limited options due to resistance to other medications. It is administered through subcutaneous injection, typically twice a day, and is known for its unique mechanism of action, which targets the initial stage of HIV infection. Despite its effectiveness, FUZEON's use may be associated with injection site reactions and other side effects, and its administration method can be challenging for some patients.