Fusion inhibitors prevent the HIV virus from attaching to a cell. If the virus is unable to attach, the virus cannot enter and infect the cell.

Fusion inhibitors are used in combination with other antiretroviral medications for the treatment of HIV to prevent the virus from spreading in the body and to reduce the amount of virus in the bloodstream.

Fusion inhibitors include:

• Enfuvirtide (Fuzeon)
• Maraviroc (Selzentry)
• Vicriviroc
• Experimental drug