A pharmaceutical composition comprising as a first
active ingredient an
estrogen, such as estradiol or estradiol
valerate, in sufficient amounts to treat disorders and symptoms associated with deficient endogenous levels of
estrogen in women, and as a second
active ingredient 6beta,7beta; 15beta; 16beta-dimethylene-3-oxo-17alpha-preg-4-ene-21,17-carbolactone (
drospirenone, DRSP) in sufficient amounts to protect the
endometrium from the adverse effects of
estrogen is useful for, amongst others, treating peri-menopausal, menopausal and post-menopausal women. This composition may be used for
hormone replacement therapy and may be administered as a multi-phased pharmaceutical preparation. This
combination therapy may comprise continuous, sequential or interrupted administration, or combinations thereof, of DRSP and estrogen, each optionally in micronized form.