Testosterone injections are a form of hormone replacement therapy designed to supplement or replace the natural testosterone that is absent or produced in inadequate amounts by the body. This treatment is intended for males who have been diagnosed with medical conditions that cause low testosterone, confirmed through laboratory testing and clinical evaluation. The therapy aims to alleviate symptoms such as decreased libido, fatigue, and loss of muscle mass, helping to restore physiological functions that are dependent on this crucial hormone.

This medication works by introducing a synthetic form of testosterone into the body, which functions identically to the naturally produced hormone. Once injected, the testosterone is gradually released into the bloodstream, where it travels throughout the body to bind with androgen receptors in various tissues. This process helps to initiate and maintain the normal development and function of male sexual characteristics and supports overall health by influencing muscle mass, bone density, and red blood cell production.

Testosterone injections should only be administered by a healthcare professional or, if instructed, self-injected after proper training on the correct technique. The dosage and frequency of injections are determined by a physician based on the patient's specific condition and testosterone levels. It is critical to adhere to the prescribed schedule and to rotate injection sites to prevent skin irritation or other local reactions. Patients should inform their doctor of their complete medical history, including any history of heart, kidney, or liver disease, prostate issues, or sleep apnea, as testosterone therapy can worsen these conditions. Regular blood tests and follow-up appointments are necessary to monitor treatment progress, check for potential side effects such as increased red blood cell count or changes in cholesterol levels, and adjust the dosage as needed. This medication is not intended for use by women and may be habit-forming if used improperly.