The clinical efficacy of CELSENTRI (in combination with other antiretroviral medicinal products) on plasma HIV RNA levels and CD4+ cell counts have been investigated in two pivotal ongoing, randomized, double blind, multicentre studies (MOTIVATE 1 and MOTIVATE 2, n=1076) in patients infected with CCR5 tropic HIV-1 as determined by the Monogram Trofile Assay.