Doctors will typically prescribe minoxidil and spironolactone for female pattern hairloss. For post-menopausal women stronger drugs such as Finasteride/dutasteride are potential options. You should first try to seek out a dermatologist or hairloss surgeon that specializes in treating female pattern hairloss to discuss your options. These doctors will typically prescribe topical minoxidil or 0.625-1.25mg/day oral minoxidil for women.
Please note, oral minoxidil is a powerful drug and has many potential side effects that you must be properly advised on (tachycardia, edema, etc) with hypertrichosis being the most problematic for many women.
In the below video three dermatologists discuss various hairloss case studies including that of a 52yr old woman (44:00) and how they would approach treating her. There are other videos in this series where they discuss oral min and female hairloss that may be useful for you: