Dutasteride is a prescription only 1 capsule a day drug which has now become a common treatment for hair loss in men.
Like Finasteride, Dutasteride was developed to treat enlargement of the prostate. Whereas Finasteride reduces the activity of only one type of enzyme that causes DHT, Dutasteride reduces both types of the 5-Alpha Reductase enzymes that cause hair loss. Dutasteride is good for those who have had a limited response to Finasteride.
Although unlicenced in the U.K. for the treatment of male hair loss Dutasteride is a safe, well documented drug which is widely prescribed for the treatment of male pattern baldness by many U.K. and European doctors.