Have you considered trying a deltoid injection in the past, but didn’t know where to begin? Today’s your lucky day.

Intradeltoid injections, like the others, may seem scary to try at first.

In fact, they are one of the easiest and safest injections to perform.

They are one of the top three injection sites recommended and used by the medical community.

They are so safe, that this is the most common injection site used for children, for shots and vaccines.

In this guide, you’ll learn everything you need to know in order to successfully perform a deltoid intramuscular injection.

So let’s get to it!


Before we begin, please note that doctors still recommend the gluteteal injection for testosterone replacement therapy. If you are on TRT, and wish to try out a different injection site, like the deltoid or quad, please get approval from your doctor first.

For everyone else, this guide will show you how to perform a deltoid injection successfully. The demonstration will be centered around a testosterone injection, however, it applies to any medication that needs to be injected into the deltoid.

The information I present below is sourced directly from the latest medical literature and is used by the medical community.


Injection Site Overview

The deltoid is one of the easiest and safest placest to inject, but you still need to make sure you know exactly where it is.

Figure 1.

In Figure 1, you will see the injection site and injection zone clearly highlighted in green.

This inverted green triangle is the safe site for intradeltoid injections. It is located between Point A (acromio-clavicular joint) and Point B (deltoid tuberosity).

As you can see, it’s a pretty straightforward to locate.

To make things clearer, I have included a picture of a nurse’s dummy (in Figure 2), which has the deltoid injection site clearly demarcated.

Figure 2.

Figure 3 offers you another view of the intradeltoid injection site.

Figure 3.

Make sure you’re below the bony part of the shoulder, and in the fleshy part of the upper arm, as seen in the figures above.

Injection Equipment

Next, we’ll take a look at the equipment and supplies needed for the injection.

These are the most commonly used items, however, they may very slightly according to your medication and what your doctor recommends.

Below is a photo illustrating the equipment needed for a deltoid injection.

You will need:

  • Your testosterone ampoule or via
  • An 18G 1.5 inch needle for drawing
  • A 25G 1 inch needle for injecting
  • A 1ml Syringe
  • Alcohol swaps/pads for disinfecting the injection site and wiping after.
  • A Sharps Bin or suitable container for disposal of sharp objects

Injection Preparation

Please follow the following instructions in order to prepare your injection:

  • Wash your hands and make sure they are clean.
  • Open the thicker, 18G needle and attach it to the syringe.
  • Draw the medication from your ampoule/vial. If you are drawing from a vial, it is sometimes recommended to wipe the top of the vial with an alcohol swab.
  • Remove any air bubbles from the syringe. Hold the syringe upright and flick the syringe to allow any air bubbles to travel to the top. Then squeeze them out until there are no air bubbles remaining in the syringe.
  • Remove the thicker 18G needle, and attach the finer, 25G needle.
  • Open the alcohol swabs so that they’re ready to be used.

You are now ready to inject your medication/testosterone into your deltoid.

Below is a video illustrating the process of preparing an injection for further illustration.

Performing Your Injection

Please follow the steps below to perform your injection.

  1. Locate the deltoid injection site as illustrated earlier.
  2. Take an alcohol swab and wipe the injection site for a couple of seconds, making sure it’s clean.
  3. Take the prepared injection and remove the safety cap, making sure not to touch the needle.
  4. Inject your medication into the injection site.
    NOTE: Before injecting, you can aspirate if you like, or not. Aspiration is where you pull back on the plunger before injecting to check whether you draw blood or not. See [this video] for a full explanation on aspiration, As we discussed earlier, this injection site is safe and devoid of any major blood vessels, and the medical community doesn’t typically aspirate for this site anymore.
  5. Push down on the plunger until all your medication is out.
  6. Remove the needle and replace the safety cap.
  7. Wipe the injection site with an alcohol pad. It may or may not bleed a little. You may apply a plaster/band aid if you like, but this is usually not necessary.
  8. Finally, don’t forget to dispose of your sharp objects into a sharps bin or appropriate container.

If you are still unsure about this, feel free to watch the “How To Do A Deltoid Injection” demonstration video on my YouTube channel.


That’s it. Congratulations! You’ve done your first deltoid injection.

Let me know how your injections go in the comments section below.

Please be safe and work with your doctor at all times.

I hope this article helped you to add another injection site to your repertoire and get over any fears you may have had about doing deltoid injections.

Don’t forget to check out my YouTube Channel for more guides and instructional videos.

Till next time.

About author View all posts Author website

Paolo Broccardo

I help men take control of their testosterone, health and lives. Testosterone Replacement Therapy turned my life around and my goal is to help other men with low testosterone do the same! Thanks to TRT, I traded anxiety, depression and weakness for courage, motivation, strength, love and masculinity. I'd love to help you do the same.

2 CommentsLeave a comment

  • Hello, I have been on trt for 6 months. I take 100mg a week on Mondays. I had blood work my estrogen was high at 254 and my doc gave me arimidex 1mg a day for 1 week. Is this ok to do? I have heard people take 1 a week. Have not been able to find a lot of info. Would the 1 week work for 3 months till I get more blood work? Thank you very much.

    • If the higher estrogen levels are not causing any noticeable side effects, then you should not be using Arimidex, which may cause more issues. Ditch it, unless you actually see side effects. If you don’t trust your doctor’s judgment regarding the prescription, find a more experienced TRT practitioner. Most of them do not prescribe an AI unless there is a direct cause for one. An increase in estrogen without any other side effects is not a good reason to start an AI.

Leave a Reply

Your email address will not be published. Required fields are marked *

JoinOur Community

JoinOur Community

Subscribe to my mailing list and join our community and receive the latest news and special promotions.

(Your information is private and will never be shared)

You have Successfully Subscribed!

/* ]]> */