Finasteride (1 mg) should only be recommended in the absence of contraindications. This treatment will be prescribed for life. It can give a slight improvement in about 30% of patients. Side effects are rare but possible side effects include a decreased libido and erectile dysfunction and in exceptional cases of mammary illness. Dutasteride has not been formally approved for this treatment.
Historically, there was a stabilization of the hair loss in the 4th-6th week, probably due to Minoxidil, a visible emergence of hair from the 3rd month and an aesthetically satisfactory quality of the regrowth towards the 6th-9th month, presumably due to finasteride.
In other words, it would appear that Minoxidil stimulates early hair that remains fine and longer; the finasteride, of slower action, causes a more full-coverage regrowth of longer and thicker hair, finally, the micrografts bring hair permanence.