Testoplex E (Testosterone Ethanate) 300 mgs/10ml is an injectable solution of testosterone, a naturally occurring male hormone. It is used to treat low testosterone levels or hormonal imbalances in men. It can also be used for maintenance of normal testosterone levels, for example in individuals who have been treated for prostate cancer. Testopelx E increases testosterone levels and can have beneficial effects on overall wellbeing, energy and vitality, libido, and sexual function. Possible side effects may include acne, decrease in semen production, headache, mood changes, and irritability. Regular monitoring of testosterone levels is advised.