Side effects of metenolone enanthate include symptoms of masculinization like acne , increased hair growth , voice changes , and increased sexual desire .  The drug is a synthetic androgen and anabolic steroid and hence is an agonist of the androgen receptor (AR), the biological target of androgens like testosterone and dihydrotestosterone (DHT).   It has moderate anabolic effects and weak androgenic effects, as well as no estrogenic effects or risk of liver damage .   Metenolone enanthate is a metenolone ester and a long-lasting prodrug of metenolone in the body. 
Not shortly after Roger Maris record was broken, another baseball player, Jason Giambi and various other athletes were either suspected of, or proven to have, taken anabolic steroids. Again, Congress convened a hearing, and just as they did the first time in 1990, they did not determine that steroids were a danger, but rather that the danger was more in protecting professional sports organizations. The updated statute has been updated to proscribe pro-hormones also The definition of an anabolic steroid as defined currently in the United States under (41)(A) is that "anabolic steroid" means any drug or hormonal substance, chemically and pharmacologically related to testosterone (other than estrogens , progestins, corticosteroids, and dehydroepiandrosterone (7).
The point is simple, you have no need to fear testosterone injections , as this is a hormone your body is quite accustomed to; in-fact, it craves it. Granted, while supraphysiological doses can be tolerated there will be a cutoff point in each man. The higher the dose goes the greater potential for adverse reactions, and while this is true, unfortunately there is not a one size fits all answer as to where this cutoff will occur. In the end, you must be responsible, listen to your body, pay attention to your body and supplement with caution.