Aquaviron Injection contains testosterone, a hormone medicine that is mainly prescribed for men with low testosterone levels, not specifically for bodybuilding or muscle growth. Using it without proper medical supervision is not recommended. Possible side effects may include mood changes, injection site reactions, polycythemia (high number of red blood cells) and headache. For muscle building, it is usually safer to focus on proper diet, protein intake, strength training, and adequate rest rather than using hormone injections without medical advice.