Topical estrogen and progesterone creams and oral medications are generally the forms prescribed for post-menopausal women with androgenetic alopecia. But HRT will rarely, if ever, be prescribed for treatment of hair loss alone.] If you have other bothersome symptoms which might warrant HRT, in addition to hair loss, you'll first need to undergo a thorough gynecologic and physical exam, and will likely have blood tests done to measure hormone levels before these drugs are prescribed.
Other drugs commonly attributed to causing madarosis are miotics, anticoagulants, anti-cholesterol drugs, antithyroid drugs, propranolol, valproic acid, boric acid, and bromocriptine.[21,99] Anticoagulants in high doses have been found to produce loss of scalp, pubic, axillary, and facial hair with loss of eyebrows after a latent period of a few weeks of treatment with dextran and heparin. Propranolol can cause diffuse alopecia along with loss of eyebrows due to telogen effluvium, usually after three months of therapy. Loss of medial aspect of eyebrows can be seen in fetuses exposed to valproic acid. Diffuse alopecia including that of eyebrows has been described due to chronic ingestion of mouthwashes containing boric acid. There was complete reversal following stopping the practice. Levodopa has been noted to cause severe diffuse alopecia within three months of daily use. Hair loss can occur soon after starting topical minoxidil therapy (due to detachment of club hairs following resting hairs reentering anagen), and after cessation of therapy (due to telogen effluvium).
While these factors contribute to hair loss for any woman, it’s particularly dicey for those of us with PCOS because when the follicle is exposed to our elevated androgens such as DHT (di-hydro testosterone, an active metabolite of testosterone) it gets damaged. Whenever a cell is damaged it generates oxidative stress which further alters the androgen receptor in the follicle perpetuating the issue.