Until recently, the only commercial testosterone products available contained methyltestosterone, a synthetic form of testosterone, in dosages only appropriate for men. Current studies, however, clearly show that testosterone is also an important hormone for women. Now, because of its increased popularity, there has been a rush by both pharmaceutical companies and compounding pharmacies to meet the demand. The estradiol-testosterone combination patch Estratest® provides dosages appropriate for women, but does not contain natural, bio-identical testosterone. Presently, bio-identical testosterone can only be purchased from compounding pharmacies, formulated as tablets, capsules, creams, gels, or sublinguals.