Rub the alcohol wipe in a circular motion outward from the injection site to ensure the area is clean. Before you inject, use an alcohol wipe to clean the injection site on your body. Invert the vial (hold it upside down) and pull the testosterone into the syringe to the appropriate dosage. Proper technique is non-negotiable when injecting testosterone in the deltoid. Testosterone replacement therapy (TRT) has become increasingly common for men experiencing low testosterone levels. Free access to complete text was unavailable for several articles; thus, a review of such articles could not be performed because abstracts were excluded from our study. Further cadaveric and ultrasonographic studies are needed to study the neurovascular profile in relation to safer areas for IMI in the deltoid muscle. This site is far below the surgical neck of the humerus (7 cm), the AXN (7 cm), the subdeltoid bursa (5 cm), and the PCHA (7.6 +/-1.0 cm); therefore, the chance of injury to blood vessels and nerves is the least. Based on the neurovascular network lying underneath the deltoid muscle and in relation to the upper end of the humerus, the proximal humerus is related to a network of arteries arising from the second part of the axillary artery. Microdosing means dividing the total further (for example, taking 120 mg/week as 60 mg twice weekly or 20 mg EOD). You can deliver the same weekly total in different ways—once weekly, twice weekly, every other day (EOD), or daily—to control peak–trough swings. Dosing should follow local product information and the same monitoring principles used for all injectables (see Drugs.com for labeled dosing references and the Endocrine Society guideline for monitoring). You may see the phrase "sustanon 250 dosage 1ml per week" online; treat it as a discussion point, not a universal standard. Slightly tender a few minutes after but no pain, more so the muscle feels a little tight after. Store testosterone vials at room temperature, away from direct sunlight and heat. Injecting a larger volume can increase the risk of pain and discomfort. Consult with your healthcare provider to determine the best needle size for you. Its relatively small size compared to the glutes and thighs makes accurate injection technique essential. The deltoid muscle is a triangular-shaped muscle located in the shoulder. Understanding the pros and cons of each injection site is paramount for a successful and safe TRT regimen. This guide explains how clinicians set and adjust TRT dosing using a practical testosterone injection dosage chart. Common injection sites include subcutaneous (under the skin), deltoid (shoulder), and ventrogluteal (hip) regions. This intramuscular injection video for testosterone shows you everything you need to know about injecting testosterone safely. This area is preferred for its large muscle mass, which can accommodate larger injection volumes while minimising discomfort.