How to Inject Ozempic: Step-by-Step Guide (2026)

Giving yourself a weekly injection can feel daunting the first time. This step-by-step guide covers everything — how to prepare, where to inject, technique, what to do if something goes wrong, and the key mistakes to avoid.

What You Will Need

For Ozempic/Wegovy pens: the pen itself plus fresh pen needles (BD or NovoFine 4mm 32G are ideal). For compounded semaglutide vials: insulin syringes (1ml, 29–31 gauge, 6mm needle), alcohol swabs, and the vial. Always use a fresh needle for every injection — reusing needles increases pain, blunts the tip, and risks infection.

Step-by-Step Injection Guide

1. Wash hands thoroughly with soap and water for at least 20 seconds.

2. Prepare the medication. For pens: remove the pen cap and attach a fresh needle. For vials: draw the correct dose using the insulin syringe, tapping out any air bubbles and pushing them out.

3. Choose and clean your site. Abdomen (2 inches from navel), upper outer thigh, or upper outer arm. Clean with an alcohol swab and allow to dry fully — 30 seconds. Do not inject into wet skin.

4. Pinch the skin. Gently pinch a fold of fatty tissue between your thumb and forefinger. This lifts the subcutaneous fat away from muscle — important for a comfortable injection.

5. Insert the needle. At a 90-degree angle for the abdomen and thigh. For very lean individuals or the upper arm, a 45-degree angle may be more appropriate. Insert smoothly and quickly.

6. Inject slowly. For pens: press and hold the button until the dose counter reaches zero, then hold for 6 seconds before withdrawing. For syringes: depress the plunger slowly and steadily over 5–7 seconds.

7. Withdraw and dispose. Remove the needle at the same angle it entered. Do not rub the site. Dispose of the needle immediately in a sharps container.

The Best Injection Sites

Abdomen: Most accessible, good fat layer in most people, easiest to self-inject. Avoid the 2-inch circle around the navel. The lower abdomen (below the belt line) is particularly comfortable for many people.

Outer thigh: Good alternative for rotating from the abdomen. Inject into the outer-front surface of the middle third of the thigh. Avoid the inner thigh and the knee area.

Upper outer arm: Slightly harder to self-inject accurately but usable. The fatty area on the back-outer surface of the upper arm. Easier with a short 4mm pen needle.

Rotation — Why It Matters

Using the same exact spot every week causes lipohypertrophy — fatty lumps under the skin that affect absorption consistency. Rotate within and between sites. A simple system: abdomen left side week 1, abdomen right side week 2, left thigh week 3, right thigh week 4, then repeat. Mark it on your phone calendar.

Storage of Semaglutide

Unopened pens/vials: refrigerate at 2–8°C. In-use pens: can be stored at room temperature (up to 30°C) for up to 56 days. Compounded vials in-use: typically refrigerate and use within 28–30 days (check your provider’s guidance). Never freeze semaglutide. Never use medication that has been frozen or exposed to temperatures above 30°C for extended periods.

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