Testoderm is a form of testosterone that is absorbed through skin. Body builders and athletes use it to build muscle and improve its strength. They also use it to maintain the shape and size of body as it increases the number of muscle fibre. It also guards the muscle from wasting and helps muscle in storing protein instead of releasing it. Patches with cream, pastes, gel are designed for testoderm patch delivery system for better penetration of testosterone into skin. It is easily available in the market. The effective dosage for men is 200 to 3000 mg per week and its use for women is not suggested.