How to go about introducing Dutasteride?

I have been using Finasteride 1mg a day for around 16months now, alongside Topical minoxidil and microneedling once a week with varying needle lengths from 1-1.5mm. I have noticed a lot of hairs are growing back, but they do not grow past a certain length (maybe around 2-3cm). So i am considering the use of dutasteride, how would i go about introducing this? Once a week alongside my daily finasteride, or completely stop finasteride and start Dutasteride 3x a week/ daily. Thank you