Propecia is currently held to be the most effective hair loss treatment for male patients suffering from hereditary form of hair loss. Its main active substance is finasteride, an antiandrogen capable of protecting our hair follicles from harmful effects of dihydrotestosterone attacks. Dutasteride is a chemical substance similar to finasteride but since it is a dual 5-alpha reductase inhibitor it is thought to be more powerful than Propecia’s finasteride. GlaxoSmithKline is the originator of Avodart, the drug containing dutasteride used to treat enlarged prostates (benign prostatic hyperplasia) and it has recently completed phase III clinical study of dutasteride for its application as a hair loss treatment for male patients. Although the final data has not yet been released it is expected that dutasteride can prove to be a better hair regrowth treatment than finasteride especially in the frontal area of the scalp where the hair regrowth is needed most and is most difficult to achieve. However, dutasteride is also expected to be having more serious side effects as it stays in human body for much longer than finasteride. Although, dutasteride or any of its branded forms have not been approved by the FDA for treating hair loss in the US it has already been approved in some other countries and is available as generic Avodart (dutasteride) and can be bought also in the US through numerous online pharmacies. Dutasteride is being currently also prescribed for hair loss by some doctors in the US to patients who no longer respond to finasteride. The biggest risk one takes when deciding on dutasteride apart from buying a fake product is the side effects that have not yet been properly documented. Dutasteride should not be used by young males planning to have kids in the foreseeable future as it can have potentially negative impact on the development of the male fetus.