Used as a long-acting injectable testosterone ester in hormone replacement therapy for males with low testosterone levels. Provides a slow release of testosterone into the bloodstream, helping maintain stable hormone levels over an extended period. Commonly used in androgen replacement therapy to support muscle mass, bone density, libido, and overall hormonal balance. Also utilized in some cases for transgender hormone therapy. The ester prolongs the activity of testosterone by delaying its absorption after intramuscular injection.