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The first pin of testosterone enanthate 250mg had a fair ... The first pin of testosterone enanthate 250mg had a fair amount of post injection pain, but I think my technique was a bit rusty. Subsequent pins have been very mild in regards to PIP.
Testosterone booster side effects include: 1  Skin reactions like oily and acne-prone skin, especially on the back. 2  Difficulty sleeping and sleep apnea has been reported. 3  Though testosterone is highly effective in building muscle, it does not necessarily help grow the supporting ligaments and tendons.