A Study to Investigate the Safety, Tolerability and Pharmacokinetics of Repeat Dose Administration of Long-Acting GSK1265744 and Long-Acting TMC278 Intramuscular and Subcutaneous Injections in Healthy Adult Subjects

LAI115428 is a Phase I, randomized, repeat dose escalation study to determine the safety, tolerability, and PK profile of intramuscular and subcutaneous injections of GSK1265744 in a long acting parenteral (LAP) formulation in healthy subjects. Subjects will be randomized to 3 monthly dosing cohorts and 1 quarterly dosing cohort with either intramuscular or subcutaneous dosing. In the monthly dosing cohorts subjects will receive GSK1265744 alone for 2 months and then in combination with TMC278 long acting parenteral (LA) for 2 months. For the quarterly dosing cohort, 2 quarterly intramuscular doses of GSK1265744 LAP will be given alone. Three dose levels of GSK1265744 will be evaluated partly in combination with TMC278 LA to adequately characterize the GSK1265744 LAP and TMC278 LA safety, tolerability, and PK profile. A total enrolment of approximately 40 healthy subjects is planned for this study.