- Women of childbearing potential must be using an effective nonhormonal method of contraception (intrauterine device or intrauterine system; condom or occlusive cap [diaphragm or cervical or vault caps] with spermicidal foam or gel or film or cream or suppository; true abstinence; or vasectomized male partner, provided that he is the sole partner of that subject) for a period of at least 1 month before and after dose administration. Women of childbearing potential must have a negative pregnancy test result within 48 hours before the start of the first investigational medicinal product (IMP) administration. Hormonal contraceptives will not be allowed because the effect of BIA 9 1067 on the metabolism of hormonal contraceptives and vice versa is not yet known;