yes but dutasteride inhibits the two types of alpha 5 thingy
finasteride only inhibits one
dutasteride is much stronger meaning it has a long half life in the body compared to finasteride
"proscar" 5mg finasteride is cheaper and usually pretty effective at maintaining your existing hair
some people take both
some people get good results with finasteride and when they add dutasteride they get worse
everyone reacts different
its pretty standard to start with finasteride alone and then go from there
cheers