Best Place To Inject Testosterone. Place the needle carefully on the syringe, uncap the needle, and put the needle into the vial by puncturing the rubber in the middle. Before injecting the testosterone, wash your hands thoroughly for at least 20 seconds with soap and water.


Remove the needle from the vial. Two relatively easy and accessible sites for intramuscular injection are the deltoid (upper arm) or the glut (upper back portion of the thigh, ie, the butt cheek). 50mg twice per week by im/sq.