I've thought about swithicng to Dutasteride but I'm wary as it's much stronger than finasteride, ie greater risk of side effects.
has there been a proper Dutasteride study like the finasteride 10-year study?
The only study on the effect of dutasteride that I am aware of is called "The importance of dual 5a-reductase inhibition in the treatment of male pattern hair loss: Results of a randomized placebo-controlled study of dutasteride versus finasteride". But it lasted only 6 months (24 weeks). Basically, 0.1 mg dutasteride/day is equal to 5 mg finasteride/day. I think that you could add a small amount of dutasteride to your normal finasteride regimen. There was a recent case study, when the addition of 0.5 mg dutasteride/WEEK to 1 mg finasteride/day led to a dramatic increase of hair density in a man, who had been losing hair on finasteride solo.