I had a legit prescription for 3 months Finasteride but I need to book in for a follow up to get more as I have run out of tablets since last week. I recommend Finasteride, it gets a thumbs up from me so far.
If I wanted to go for Dutasteride I would most likely have to source elsewhere as I doubt I would have an easy time getting hold of a prescription for it. Also, the safety profile is a little more controversial than finasteride. I've read varying stories of it working wonders and also causing disasters...
Interestingly, the 5% minoxidil/Azelaic acid (also has retinol in it) seems to be sprouting longer vellus hairs just below my hairline on my frontalis muscle so I will take this as a good sign.