A Drug Interaction Study of BIIB074 and an Oral Contraceptive Regimen

The primary objective of this study is to evaluate the effect of multiple doses of a uridine diphosphate glucuronosyltransferases (UGT)-inducing oral contraceptive (OC) regimen (ethinyl estradiol and levonorgestrel) on the PK of BIIB074 at steady state; evaluate the effect of multiple doses of BIIB074 on the pharmacokinetics(PK) of an OC regimen (ethinyl estradiol and levonorgestrel) at steady state. The secondary objective of this study is to evaluate the safety and tolerability of BIIB074 when administered alone and when coadministered with a UGT-inducing OC regimen containing ethinyl estradiol and levonorgestrel and to evaluate the effect of a UGT-inducing OC regimen (ethinyl estradiol and levonorgestrel) on the PK of the M13, M14, and M16 metabolites of BIIB074.