Many medications may cause hair loss but it is generally not the number one cause of hair loss in women. You may want to see a doctor to find out if there are other cause for your hair loss.
Minoxidil will increase blood flow to the scalp in order to revitalize hair follicles minimized by DHT, the molecule responsible in androgenetic alopecia (male pattern balding). It can help in the earliest stages of traction alopecia, but there is no guarantee that it can reverse the damage done...
Finasteride should not cause telogen effluvium. Reports of finasteride causing temporary shedding have been made but this should abate within a month or two at most