<qa>  What is a condom required to be used by vasectomized men?12. Sexually active males unless they agree to use a condom during intercourse while taking drug and agree to continue for 3 months after the last dose of study treatment. Male patients for 3 months should not father a child in this period. A condom is required to be used also by vasectomized men in order to prevent delivery of the drug via seminal fluid. 