Duavee is a hormone receptor modulator that has been approved for the treatment of menopausal symptoms in menopausal women. The goal of this 8-week randomized, double blind, placebo controlled pilot study, is to determine whether this medication alleviates menopausal symptoms in women with MS. The investigators will secondarily determine whether addressing menopausal symptoms ameliorates MS symptoms and, on MRIs, is not triggering worsening inflammation.