Jerilynn C. Prior MD, FRCPC, Professor of Endocrinology/Metabolism, Department of Medicine, University of British Columbia and Vancouver Hospital, Vancouver,
Estrogen and progesterone (so-called "hormone replacement") therapy was formerly considered essential for menopausal women. The purpose of this paper is to outline the shifts in concepts related to estrogen and progesterone therapy and to describe situations in which it remains a practical, effective therapy for older women.
Estrogen and progesterone are useful for women >65 years old who have osteoporosis diagnosed by bone mineral density or vasomotor symptoms (VMS) disturbing sleep, especially if either are combined with recurrent urinary tract infections or severe dysparunia. If a woman has had a fragility fracture (in a fall from a standing height or less), hormone therapy should be combined with a bisphosphonate such as etidronate for optimal fracture prevention.
Optimal hormone therapy for older women, ideally, is transdermal (patch or gel), rather than oral, to decrease thromboembolic risks. Several lines of evidence suggest that low estrogen doses (such as 25 µg Estraderm® patch, one pump Estragel®) are adequate. Oral micronized progesterone (Prometrium®), given daily, avoids flow, is effective for VMS and increases bone formation. Optimal therapy is daily full or moderate dose progesterone (200 to 300 mg or 5-10 mg medroxyprogesterone).