How to Inject Medication

How to Inject Your GLP-1 Medication

This guide covers where to inject and how to do it correctly. Follow these steps each time you administer your GLP-1 medication.

Step 1: Prepare the injection site

Before injecting, clean the area you have chosen with an alcohol swab. Use a circular motion, working outward from the center, then allow the skin to air dry completely. This takes about 15 to 30 seconds.

Tip: Do not blow on or fan the area to speed up drying. Injecting into wet skin can cause stinging and may increase infection risk.

Step 2: Choose your injection site

GLP-1 medications are given subcutaneously — into the fatty tissue just beneath the skin. There are three approved sites.

Abdomen

Inject into the fatty area of the abdomen. Stay at least 5 cm (2 inches) away from your navel in any direction. The area below and to the sides of the navel works well for most people.

Avoid:

  • Within 2 inches of the navel
  • Over the waistband or belt line
  • Stretch marks or scar tissue
  • Any area that is tender, bruised, or swollen

Outer thigh

Inject into the outer, front-facing portion of the upper thigh — roughly the middle third between the hip and knee. This area typically has a good layer of subcutaneous fat.

Avoid:

  • The inner thigh
  • The back of the thigh
  • Close to the knee or hip joint
  • Any area with visible veins near the surface

Upper arm

Inject into the outer, fleshy area of the upper arm — roughly halfway between the shoulder and elbow. This site is easier with assistance. If self-injecting, the abdomen or thigh is generally easier to reach.

Avoid:

  • The inner arm
  • Too close to the shoulder or elbow joint
  • Near the deltoid muscle if you are very lean
Important: Rotate your injection site with every dose. Using the same spot repeatedly can cause lumps or hardened skin (lipohypertrophy), which affects how well medication is absorbed.

Step 3: Prepare a new sterile syringe

Remove the syringe from its packaging carefully and avoid touching the needle. Pull back the plunger to the number of units prescribed, insert the needle into the vial, and slowly push the plunger into the vial. The air pressure difference that you inject into the vial will allow for drawing the liquid with less resistance. Tilt the vial up to submerge the needle tip in the medication.

Finally, draw the medication to the correct unit mark. Check for air bubbles and gently tap the syringe to remove them if needed.


Step 4: Pinch and angle the skin

How you hold the skin and angle the needle determines where the medication is deposited. Getting this right ensures it reaches the subcutaneous fat layer, not the muscle.

  1. Using your non-dominant hand, gently pinch a fold of skin about 1 to 2 inches wide at your chosen site.
  2. Hold the fold firmly but without squeezing too hard — you want to lift the fat layer away from the muscle.
  3. For most adults, insert the needle at a 90° angle straight into the skin fold.
  4. If you are very lean with little subcutaneous fat, your provider may advise a 45° angle to avoid hitting muscle.
Tip: Keep the skin pinched throughout the entire injection, not just at the start.

Step 5: Inject the medication

With your site prepared and skin pinched, you are ready to inject.

  1. Insert the needle smoothly and quickly in one confident motion — hesitating makes it more uncomfortable.
  2. Once the needle is fully inserted, begin delivering the medication slowly and steadily.
  3. Keep the needle in place for a full 10 seconds after the dose is complete. This ensures all medication is delivered before you withdraw.
  4. Withdraw the needle at the same angle it was inserted — straight out at 90°, or at 45° if that was your entry angle.
  5. Release the skin fold as you remove the needle.
Tip: A relaxed muscle hurts less. Take a slow breath and make sure the injection area is not tensed up before inserting the needle.

Step 6: Aftercare

A few simple steps after injecting help with comfort and confirm a successful dose.

  1. Apply gentle pressure to the site with a clean cotton ball or gauze for a few seconds.
  2. Do not rub the site — rubbing can cause irritation and affect medication absorption.
  3. A small amount of bleeding or a tiny bruise is normal and not a cause for concern.
  4. If you notice medication leaking back out of the injection site, contact your provider — you may need to adjust your technique or hold the needle in place longer.
  5. Dispose of the used needle immediately in a sharps container.
Warning: Never recap a used needle with two hands, and never place used needles in regular household rubbish. Always use a sharps container.

Step 7: Rotate your sites

Rotation is one of the most important habits to build. Injecting into the same spot repeatedly causes tissue damage that reduces how well the medication is absorbed.

Within each region: Move at least 1 cm from your last injection point each time. Work methodically across the region before repeating a spot.

Between regions: Many patients cycle through the abdomen, thigh, and upper arm on a weekly or dose-by-dose schedule. Ask your provider what works best for your dose frequency.

Tip: Keep a simple log — even a note on your phone — recording the date and which site you used. This makes rotation easy to track.
Important: Avoid injecting into any area where the skin feels hard, lumpy, or different in texture. These changes (lipohypertrophy) reduce absorption and should be reported to your provider.

Always follow your prescriber's specific instructions. Contact your healthcare provider or pharmacist if you have any concerns about your injection technique.

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