Testosterone therapy may have potential side effects, although they vary from person to person. Common side effects can include acne, increased red blood cell count, fluid retention, changes in cholesterol levels, decreased sperm production, and breast enlargement. Additionally, testosterone therapy can also affect prostate health, potentially worsening existing prostate conditions. Working closely with a healthcare provider who can monitor and manage these potential side effects is essential to ensure the safety and well-being of individuals undergoing testosterone replacement therapy.