6. Women of childbearing potential must be neither pregnant nor breast-feeding. Confirmation that the subject is not pregnant must be established by a pregnancy test before the single dose and at study end. Fertile women must be willing to practice reliable methods of contraception. Medically accepted safe methods of contraception for the purpose of this study will include surgical sterilisation, intra-uterine device, diaphragm with spermicide, or condom with spermicide. As interaction studies between ABR-215050 and hormonal (oral or depot) contraceptives have not yet been performed, women using such devices must also use a complementary contraceptive device.