From what I heard dutasteride will never be on finasteride positions in terms of safety just cause it has this much longer half life period, after being fully loaded. I think you got my idea right, Im not a native english speaker :)
try Revivogen out, its finasteride equivalent to block DHT effect on ur hairs but...its effect is poor comparing to Finasteride, but may be it can work good for you, but dont expect a lot, keep in mind Revivogen is pretty expensive. The sad truth is in most cases you can't get your hairs back...