How to Draw Semaglutide From a Vial: Step-by-Step Guide

Before touching the vial, verify your prescribed dose and calculate the number of syringe units using the formula: units = (dose in mg / concentration in mg per mL) x 100. Write down the target number of units.

Gather your supplies: one new, sealed U-100 insulin syringe, your semaglutide vial, an alcohol swab, and a sharps disposal container. Wash your hands thoroughly with soap and water. Work on a clean, flat, well-lit surface.

Remove the protective cap from the semaglutide vial if this is the first use. Wipe the rubber stopper with an alcohol swab using firm, circular strokes. Allow the alcohol to dry completely before inserting the needle. This takes approximately 15 to 30 seconds.

Do not blow on the stopper to speed drying. Cleaning the stopper before every draw prevents bacteria from entering the vial. Even if you cleaned it at your last injection, clean it again. This is a non-negotiable step for multi-dose vials.

Remove the syringe from its sterile packaging. Do not touch the needle. Pull the plunger back to draw air into the syringe equal to the number of units you plan to withdraw. For example, if your dose is 10 units, pull the plunger to the 10-unit mark.

Insert the needle straight through the center of the rubber stopper. With the vial still upright on the table, push the plunger down to inject the air into the vial. This equalizes the air pressure inside the vial, making it easier to draw the liquid out smoothly. Skipping this step can create a vacuum that makes drawing difficult.

With the needle still in the vial, turn the vial upside down so the stopper faces the floor and the syringe points upward. Make sure the needle tip is submerged in the liquid.

Slowly pull the plunger down past your target unit mark. It is easier to draw slightly more than needed and then push the excess back. Check that the syringe reads at or above your target number of units.

With the vial still inverted, look for air bubbles in the syringe barrel. Tap the side of the syringe firmly with your fingertip to move bubbles to the top (toward the needle). Once the bubbles are at the top, slowly push the plunger up to expel them back into the vial.

After removing the bubbles, adjust the plunger so the syringe reads exactly your target number of units. Hold the syringe at eye level to verify the measurement. The flat edge of the plunger stopper should align with the correct unit marking.

Once the reading is accurate, pull the needle out of the vial. Do not recap the needle. You are ready to inject.

Choose an injection site on your abdomen (at least 2 inches from the navel), the front of your thigh, or the back of your upper arm. Clean the site with an alcohol swab and let it dry.

Pinch a fold of skin at the injection site. Insert the needle at a 90-degree angle in a quick, smooth motion. Release the skin fold. Push the plunger down steadily and completely. Once the plunger is fully depressed, count to 5 before removing the needle. This ensures the full dose is delivered.

Withdraw the needle and apply gentle pressure with a clean cotton ball or gauze if needed. Do not rub the injection site. Dispose of the used syringe immediately in a sharps container.

This guide is for educational reference. Always confirm your injection technique with your healthcare provider, especially before your first self-administration.