Any treatment for androgenetic alopecia is lifelong. The only FDA approved treatment for female genetic hair loss is minoxidil.
The hormone blocking medications can be prescribed. However, because they are not FDA approved their use is "off label". Both drugs can harm a fetus if taken during pregnancy. Spironolactone is category D and Finasteride is category X.
Many dermatologists prescribe Spironolactone to women with female pattern hair loss. A lesser proportion prescribe finasteride on account of pregnancy concerns and often reserve it for lost menopausal women
But the answer to your question is - provided the medication is not used in pregnancy, any treatment is lifelong.
Jeff Donovan MD PhD FRCPC FAAD
US & Canadian board-certified Dermatologist
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