A pharmaceutical composition comprising an HIV antiviral or anti-retroviral agent that targets attachment to the cell receptor and cell entry, reverse transcription or viral DNA integration into cellular DNA and a compound of Formula II, or a pharmaceutically acceptable salt thereof, wherein n is 3 or 4, wherein X and Y, the same or different, are selected from the group consisting of H, a straight alkyl group of 1 to 6 carbon atoms, a branched alkyl group of 3 to 6 carbon atoms, a cycloalkyl group of 3 to 6 carbon atoms, F, Cl, Br, I, -CF 3, -OCF 3, -CN, -NO 2, -NR 4 R 5,-NHCOR 4, -OR 4, -SR 4, -COOR 4, -COR 4, and -CH 2 OH or X and Y together define an alkylenedioxy group selected from the group consisting of a methylenedioxy group of formula -OCH 2 O- and an ethylenedioxy group of formula -OCH 2 CH 2 O-, wherein R 6 is selected from the group consisting of a straight alkyl group of 1 to 6 carbon atoms, a branched alkyl group of 3 to 6 carbon atoms and a cycloalkylalkyl group having 3 to 6 carbon atoms in the cycloalkyl part thereof and 1 to 3 carbon atoms in the alkyl part thereof, wherein R 3 is selected from the group consisting of H, a straight alkyl group of 1 to 6 carbon atoms, a branched alkyl group of 3 to 6 carbon atoms, a cycloalkyl group of 3 to 6 carbon atoms, and a group of formula R 3A -CO-, R 3A being selected from the group consisting of a straight or branched alkyl group of 1 to 6 carbon atoms, a cycloalkyl group having 3 to 6 carbon atoms, a cycloalkylalkyl group having 3 to 6 carbon atoms in the cycloalkyl part thereof and 1 to 3 carbon atoms in the alkyl part thereof, an alkyloxy group of 1 to 6 carbon atoms, tetrahydro-3-furanyloxy, -CH 2 OH, -CF 3, -CH 2 CF 3, -CH 2 CH 2 CF 3, pyrrolidinyl, piperidinyl, 4-morpholinyl, CH 3 O 2 C-, CH 3 O 2 CCH 2 -, Acetyl-OCH 2 CH 2 -, HO 2 CCH 2 -, 3-hydroxyphenyl, 4-hydroxyphenyl, 4-CH 3 OC 6 H 4 CH 2 -, CH 3 NH-, (CH 3) 2 N-, (CH 3 CH 2) 2 N-, (CH 3 CH 2 CH 2) 2 N-, HOCH 2 CH 2 NH-, CH 3 OCH 2 O-, CH 3 OCH 2 CH 2 O-, C 6 H 5 CH 2 O-, 2-pyrrolyl, 2-pyridyl, 3-pyridyl, 4-pyridyl-, 2-pyrazinyl, 2-quinolyl, 3-quinolyl, 4-quinolyl, 1-isoquinolyl, 3-isoquinolyl, 2-quinoxalinyl, a phenyl group of formula a picolyl group selected from the group consisting of a picolyloxy group selected from the group consisting of a substituted pyridyl group selected from the group consisting of and a group of formula wherein X' and Y', the same or different, are selected from the group consisting of H, a straight alkyl group of 1 to 6 carbon atoms, a branched alkyl group of 3 to 6 carbon atoms, a cycloalkyl group of 3 to 6 carbon atoms, F, Cl, Br, I, -CF 3, -NO 2, -NR 4 R 5, -NHCOR 4, -OR 4,-SR 4, -COOR 4, -COR 4 and -CH 2 OH, wherein R 4 and R 5, the same or different, are selected from the group consisting of H, a straight alkyl group of 1 to 6 carbon atoms, a branched alkyl group of 3 to 6 carbon atoms, and a cycloalkyl group of 3 to 6 carbon atoms, wherein R 2 is selected from the group consisting of a diphenylmethyl group of formula IV, a naphthyl-1-CH 2 - group of formula V, a naphthyl-2-CH 2 - group of formula VI, a biphenylmethyl group of formula VII, and an anthryl-9-CH 2 - group of formula VIII, and wherein R 1 is selected from the group consisting of 2 P, 2 P and a group of formula R 1A -CO-, wherein M is an alkali metal or alkaline earth metal, wherein R 1A is selected from the group consisting of a straight or branched alkyl group of 1 to 6 carbon atoms, a cycloalkyl group having 3 to 6 carbon atoms, a cycloalkylalkyl group having 3 to 6 carbon atoms in the cycloalkyl part thereof and 1 to 3 carbon atoms in the alkyl part thereof, an alkyloxy group of 1 to 6 carbon atoms, -CH 2 OH, CH 3 O 2 C-, CH 3 O 2 CCH 2 -, Acetyl-OCH 2 CH 2 -, HO 2 CCH 2 -, 2-hydroxyphenyl, 3-hydroxyphenyl, 4-hydroxyphenyl, (CH 3) 2 NCH 2 -, (CH 3) 2 CHCH(NH 2)-, HOCH 2 CH 2 NH-, CH 3 OCH 2 O-, CH 3 OCH 2 CH 2 O-, 2-pyrrolyl, 2-pyridyl, 3-pyridyl, 4-pyridyl, 1-methyl-1,4-dihydro-3-pyridyl, 2-pyrazinyl, 2-quinolyl, 3-quinolyl, 4-quinolyl, 1-isoquinolyl, 3-isoquinolyl, 2-quinoxalinyl, a phenyl group of formula a picolyl group selected from the group consisting of a picolyloxy group selected from the group consisting of a substituted pyridyl group selected from the group consisting of and a group of formula