Having said all of the above, it should be noted that Primobolan does have some side effects including light acne, deepening voice and increased hair growth. These sides seem to result from the small androgenic component coupled with a very long half life in the system. Remember, the greater the exposure to a compound, the more likely you are to experience side effects. However, it displays low liver toxicity and usually has little effect on blood pressure and cholesterol, which makes it one of the safest injectable anabolic steroids available. It's also worth pointing out that, in men, the body's endogenous testosterone production is only negatively affected when high dosages are taken for prolonged periods of time.