The administration of synthetic cannabinoid agonists limits HIV infection in macrophages (white blood cells that aid in the body’s immune response), according to preclinical data published in the Journal of Leukocyte Biology. Investigators at Temple University School of Medicine in Philadelphia assessed the impact of three commercially available synthetic THC agonists on HIV-infected macrophage cells. Following administration, researchers sampled the cells periodically to measure the activity of an enzyme called reverse transcriptase (RT), which is essential for HIV replication. By day 7, investigators reported that the administration of all three compounds was associated with a significant decreased in HIV replication.