Description

Overview

Testosterone injection is a form of testosterone replacement therapy (TRT) used to treat men with low testosterone (hypogonadism). It helps restore normal hormone levels, improving muscle mass, bone density, libido, mood, and energy levels. There are different types of injectable testosterone, including testosterone cypionate, enanthate, and propionate, which differ mainly in their release times.

This therapy is often prescribed for men experiencing symptoms of low testosterone such as fatigue, erectile dysfunction, depression, and loss of muscle mass.

Mechanism of Action

Testosterone binds to androgen receptors in the body, triggering gene expression that regulates:

• Muscle and bone growth
• Red blood cell production
• Libido and sexual function
• Mood and cognitive function

Testosterone enters the bloodstream, where it is gradually released depending on the ester (cypionate, enanthate, or propionate). Once absorbed, it helps normalize testosterone levels and maintain physiological functions.

Benefits & Indications

• Restores energy and reduces fatigue
• Improves muscle mass and strength
• Enhances libido and erectile function
• Boosts mood and cognitive clarity
• Reduces fat accumulation
• Increases bone density, lowering osteoporosis risk
• Supports red blood cell production, preventing anemia

Possible Side Effects

While testosterone therapy is highly effective, it can lead to side effects, including:

• Acne and oily skin
• Fluid retention (edema)
• Increased red blood cell count (polycythemia), raising stroke risk
• Gynecomastia (breast enlargement in men)
• Mood swings, aggression, or irritability
• Sleep apnea worsening

Long-term misuse or high doses can cause testicular shrinkage, infertility, and cardiovascular issues.

Drug Interactions

• Blood thinners (Warfarin): Increases bleeding risk
• Insulin & Diabetes medications: Can alter blood sugar levels
• Corticosteroids: May lead to fluid retention and swelling
• Anabolic steroids: Dangerous when combined, increasing heart risks