Pyrido[2,3-d]pyrimidine derivatives as inhibitors of human immunodeficiency virus replication

A method of treating HIV infection in a human comprising administration of an effective amount of compound or pharmaceutically acceptable salt thereof, which is:

• in combination with a compound selected from a nucleotide reverse transcriptase inhibitor, a non-nucleotide reverse transcriptase inhibitor, a protease inhibitor, an integrase strand transfer inhibitor, and an entry inhibitor, to said human.