Raltegravir is an antiretroviral treatment – a drug that can fight off certain viral infections. It works by stopping the virus creating more of itself (replicating). Raltegravir has been used as to treat HIV for over a decade.
There is now evidence that viruses like Human Endogenous Retrovirus (HERV) could be involved in causing or triggering MS. This has led researchers to investigate if raltegravir may alter course of relapsing MS by controlling HERV infection.