It depends. If you are still losing your hair but at a much slower rate, then it means that finasteride is working. Finasteride slows down your hairloss. It does not necessarily make your hairloss non-existent. However, if you haven't noticed anything at all, then most likely finasteride isn't doing anything for you.
Using minoxidil is one of your only choices if you want to fight your hairloss.