Testosterone Undecanoate 40mg is an oral androgen medication used to treat conditions related to low testosterone levels in males, such as hypogonadism and associated disorders. This synthetic testosterone ester is designed for improved absorption and stability, making it suitable for long-term hormone replacement therapy. It is available as a capsule and functions by supplementing or replacing the naturally deficient testosterone, which is critical for maintaining male sexual characteristics, muscle mass, and overall vitality. The medication is usually prescribed by physicians specializing in endocrinology or urology after thorough evaluation of testosterone levels and clinical symptoms.