Who this guide is for
This guide is for men whose provider has recommended intramuscular testosterone and who have already had a supervised first injection. It is a refresher to keep beside you at home, not a substitute for being shown in person. Your dose, schedule, needle size and preferred site come from your provider; nothing here changes those.
Intramuscular injection puts the oil deep into a muscle, where it releases slowly. The testosterone cypionate label directs injection deep into the gluteal muscle, and in practice the outer thigh and the shoulder are also used. If you are weighing a shallower shot into fat instead, see our guide to subcutaneous testosterone injection.
Supplies checklist
- Your vial, checked for the right product, strength and expiry date
- A syringe plus the drawing and injecting needles your provider chose
- Alcohol swabs and a cotton ball or gauze
- An adhesive bandage
- A sharps container within reach
- Your injection log, to record date, site and side
Wash your hands, clear a counter, and lay everything out before you start. A calm setup prevents most mistakes.
Choosing a site
Each site has a landmark that keeps the needle in thick muscle and away from nerves and large blood vessels.
| Site | Where exactly | Good for | Watch out for |
|---|---|---|---|
| Glute, side of hip (ventrogluteal) | The V between your fingers when your palm sits on the bony bump at the side of the hip | Thick muscle, few large nerves or vessels | Hard to reach on yourself |
| Glute, upper outer quadrant | The upper outer square of the buttock | Familiar site, large muscle | Drifting low or toward the middle |
| Outer thigh (vastus lateralis) | The outer side of the middle third of the thigh | Easy to see and reach | Straying to the front or inner thigh |
| Shoulder (deltoid) | About two inches below the bony tip of the shoulder, above armpit level | Quick, easy access | Small muscle, so small volumes only |
Glute landmarks and the sciatic nerve
The sciatic nerve runs from the lower back down through the buttock, in the lower and more central part of it. Injecting too low or too close to the midline is the main way a glute shot can irritate it. Two landmarks keep you clear:
- Upper outer quadrant. Picture one buttock divided into four squares, with the top of the hip bone as the upper edge and the fold under the buttock as the lower edge. Inject only in the upper outer square, toward its outer top corner.
- Side of the hip. Place the heel of your hand on the bony bump at the side of your hip, point your index finger toward the front point of your hip bone, and spread your middle finger back along the top of the pelvis. The needle goes in the middle of the V between those fingers. This site is easiest when someone else injects you.
A sudden, electric or shooting pain down the leg during a glute injection means stop, withdraw the needle and call. Our page on what to do if a testosterone shot hit a nerve explains what usually follows.
Thigh and shoulder landmarks
For the thigh, find the space between a hand’s width below the hip and a hand’s width above the knee, then stay on the outer side of that middle third. Immunize.org’s injection guide, based on CDC guidance, places the adult alternate site in the outer portion of the middle third of the thigh. For the shoulder, it places the injection in the thickest part of the deltoid, about two to three finger widths below the bony tip of the shoulder and above the level of the armpit, and warns against going too high or too low.
Needle length by body fat
A needle must pass through the fat layer and reach well into muscle. Too short, and the oil ends up in fat, where it absorbs differently and can leave a sore lump. Immunize.org’s adult guidance for the shoulder, by weight, is a useful reference:
| Body weight (men) | Deltoid needle length |
|---|---|
| 130 to 152 lb | 1 inch |
| 153 to 260 lb | 1 to 1.5 inches |
| More than 260 lb | 1.5 inches |
The same guide says a 1-inch needle can be used in the outer thigh of an adult of any weight when the skin is stretched tight, and lists 22 to 25 gauge for adult intramuscular vaccines. Testosterone is a thicker oil than a vaccine, so your provider may pair a wider needle for drawing up with a thinner one for injecting. Men who carry more fat over the glute generally need a longer needle there. Our page on needle size for testosterone injections goes further.
Step by step
- Clean the vial stopper with an alcohol swab and let it dry.
- Draw up the dose your provider set, pulling air into the syringe first and pushing it into the vial to make drawing easier. Check the line at eye level.
- Swap to the injecting needle, if you use two, and tap out any large air bubbles.
- Find your landmark and clean the skin in a circle with a fresh swab. Let it dry so it does not sting.
- Stretch the skin flat between two fingers of your free hand. Do not pinch it up for an intramuscular shot.
- Insert the needle at 90 degrees with one quick, steady motion, all the way in. The Immunize.org guide describes the same quick 90-degree insertion.
- Pull back or not, as you were taught. Vaccine guidance says pulling back on the plunger is not necessary; some clinicians still teach a brief check at the glute. If blood appears, withdraw and start again at a new spot with a fresh needle.
- Push slowly and evenly. Oil takes time; rushing it makes the site sorer.
- Withdraw straight out and press gently with gauze. Do not rub hard.
- Drop the needle and syringe straight into the sharps container, cap off, and log the date and site.
Our guide on needle disposal in Los Angeles County covers what to do when the container fills.
What to watch for, and when to call
Some soreness is normal. MedlinePlus lists pain, redness, bruising, bleeding or hardness at the injection site among common side effects. Our page on pain and swelling at the injection site explains what is typical.
Call the clinic at 626-319-5261 for redness or warmth that spreads after a day or two, a hot, hard lump, fever, numbness or tingling down the leg that lingers, or a coughing fit right after an injection.
Call 911 for trouble breathing, swelling of the face or throat, chest pain, or a painful, swollen calf with shortness of breath.
How Ultimate Male teaches intramuscular injections
At our San Gabriel and Downey clinics, your first testosterone dose is given with a clinician beside you. You practice finding your landmarks on your own body, and the needle length is chosen for your build rather than from a single default. Men who would rather not self-inject can come in for shots instead.
If a site keeps hurting or you want to switch to subcutaneous dosing, raise it at your next visit; technique can almost always be adjusted. Our page on testosterone injections explains how schedules are set, and you can book a teaching visit any time you want a refresher on your testosterone therapy.
