- Pregnant or lactating women or women with positive pregnancy test at screening, fertile sexual active women that did not use or do not wish or are unable to use an accepted method to prevent pregnancy during the 2 months prior to study treatment, during the study period and up to 3 months after the last dose of study treatment. Sexual active men who do not wish to use a method of birth during the study and up to 6 months after the last dose of study treatment if their partners are women of childbearing age.