Testosterone cypionate (often referred to as "test c") is a long-acting injectable androgen ester used primarily to treat low testosterone (hypogonadism) in men, or for hormone therapy. It is administered via intramuscular or subcutaneous injection, typically every 1 to 4 weeks, and works by replacing or supplementing natural testosterone. 

Key Details About Testosterone Cypionate:

• Administration: Intramuscular (IM) injection, generally into the gluteal muscle.

• Duration: Benefits (improved mood, muscle mass) are often felt within 3–6 weeks.

• Risks: Potential side effects include acne, injection site pain, increased red blood cell count, and gynecomastia. 

• Purpose: Treats symptoms of low testosterone, including reduced muscle mass, libido, and energy.

• Mechanism: As a slow-release ester, it maintains steady, long-lasting testosterone levels.

• Brand Names:

   Common brand names include 

  Depo-Testosterone

   and Azmiro

  .

It is a prescription-only medication and should be used under the supervision of a healthcare professional.