TLDR Combination drug therapy is effective for hirsutism that doesn't improve with just one medication.
In a study from 1985, nine hirsute women who had not responded to single drug therapies were evaluated for the effectiveness of combination drug therapy. The therapies combined spironolactone (100 to 150 mg) with either oral contraceptives or dexamethasone. Hormone levels were measured before and 4 to 6 weeks after starting the combination therapy, and compared to previous responses to single drug treatments. While there was no significant difference in androgenic parameters between the combination and single drug therapies, eight out of nine patients experienced a satisfactory clinical response, defined as a significant reduction in the frequency of hair removal and patient satisfaction. The only side effect observed was transient diuresis. The study concluded that combination drug therapy is effective and well-tolerated for treating hirsutism that does not respond to single drug treatments.
183 citations,
March 1982 in “JAMA” Spironolactone is a safe and effective treatment for reducing excessive hair growth in women.
124 citations,
September 1980 in “The Journal of clinical endocrinology and metabolism/Journal of clinical endocrinology & metabolism” Spironolactone is effective in treating excessive hair growth in women.
60 citations,
September 1979 in “Fertility and sterility” Spironolactone can reduce hair growth in women with hirsutism.
[object Object] 39 citations,
November 1978 in “Annals of internal medicine” Spironolactone may help reduce excessive hair growth in women with high male hormone levels.
29 citations,
May 1975 in “Clinical Endocrinology” Combination therapy significantly reduces testosterone and moderately reduces hair growth in women with hirsutism.
47 citations,
March 2004 in “European journal of endocrinology” Spironolactone plus finasteride reduces hirsutism more effectively.
76 citations,
December 1997 in “Fertility and Sterility” Finasteride reduces hair growth better, but spironolactone has more side effects.
[object Object] 124 citations,
September 1980 in “The Journal of clinical endocrinology and metabolism/Journal of clinical endocrinology & metabolism” Spironolactone is effective in treating excessive hair growth in women.