to determine the effect of administration of a progestin alone on endogenous opioid peptide activity , we infused naloxone ( 2 mg/h for 4 h ) into seven estrogen-deficient postmenopausal women before and after oral medroxyprogesterone acetate ( provera ; 20 mg ) daily for 30 days .
C0065864
medroxyprogesterone acetate
C0699702
provera