Dolutegravir is used with other medications to treat human immunodeficiency virus (HIV) infection in adults and children 4 weeks of age and older who weigh at least 6.6 lbs (3 kg). It is also used in combination with rilpivirine (Edurant) to treat HIV in certain adults to replace their current HIV medication(s) that has been taken for at least 6 months. Dolutegravir is in a class of medications called HIV integrase inhibitors. It works by decreasing the amount of HIV in your blood and increasing the number of immune cells that help fight infections in your body. Although dolutegravir does not cure HIV, using it along with other medications may decrease your chance of developing acquired immunodeficiency syndrome (AIDS) and HIV-related illnesses such as serious infections or cancer. Taking these medications along with practicing safer sex and making other lifestyle changes may decrease the risk of transmitting (spreading) the HIV virus to other people.