Can Finasteride cause more hair loss?

Finasteride can worsen hair loss for some in the first 4-7 weeks. For a small proportion of men the drug has no benefit, and hair simply gets worse because it would have proceeded to get wors anyways. Outright worsening of hair loss due to finasteride is not common but please see your prescriber if you are concerned.

I usually warn patients that they may get some shedding when they start finasteride, but long term, there is no evidence that taking finasteride can accelerate hair loss,Dr. Robert Jones

There
is no reason why it would worsen your hair loss. Rogaine on the other hand can
cause a temporary increase in hair loss in the first month or so. Propecia does
not have this side effect.

Finasteride once a day has shown good results with regrowth in the crown area of the scalp.  It takes 4-6 months to show significant results and you may still experience hair loss in other areas while you are taking the medicine but it is not known to cause hair loss itself. There are side effects associated with Propecia however including low risk of impotence and loss of libido.  It also can be used in combination with topical treatments to enhance hair growth. Hope this answer is beneficial to you.

It can at first, but if you stick with it and take it daily it shouldn't accelerate loss past a month or so. It may be ineffective at preventing loss you would have regardless, but it is incredibly unlikely it will actively speed up your loss.

Intermittent use of finasteride or when initially commencing the therapy, will lead to transient hair loss. If taken  intermittently, the hair loss  will be intermittent . However if taken either topically or orally consistently, it serves as a good tool for preventative care although you have to be cognizant of the adverse effects of the oral route. 

Although shedding is occasionally reported to happen initially when finasteride is started, I do not believe that finasteride can cause hair loss