How to Inject Retatrutide: Step by Step Complete Guide

What You Need for Retatrutide Injection

Administering a retatrutide injection requires a reconstituted vial, insulin syringes with 0.3 mL or 0.5 mL capacity and 30G to 31G needles, alcohol swabs, and a sharps container for safe disposal. Retatrutide is injected subcutaneously — into the fatty tissue just beneath the skin — not into muscle or vein. The injection volume depends on your dose and the reconstitution ratio. At the standard 5 mg/mL concentration, a 2 mg dose is 40 units on a 100-unit insulin syringe, which is 0.4 mL.

Best Injection Sites

The three recommended injection sites for retatrutide are the abdomen, the front of the thigh, and the back of the upper arm. The abdomen offers the fastest and most consistent absorption. Pinch a fold of skin about 2 inches away from the navel, insert the needle at a 45 to 90 degree angle, and inject slowly. Rotating injection sites with each dose reduces the risk of lipohypertrophy — a buildup of fatty tissue under the skin that can interfere with absorption. A simple rotation schedule: abdomen on the right side for one week, abdomen on the left side the next, then alternate between thighs every 14 days.

Step by Step Injection Process

Step 1: Wash your hands with soap and water. Step 2: Clean the rubber stopper of the retatrutide vial with an alcohol swab. Step 3: Draw air into the syringe equal to your dose volume by pulling back the plunger. Step 4: Insert the needle into the vial through the stopper and inject the air. This equalizes pressure. Step 5: Turn the vial upside down and draw the correct amount of solution. Step 6: Remove any air bubbles by tapping the syringe and gently pushing the plunger. Step 7: Clean the injection site with a fresh alcohol swab. Step 8: Pinch the skin, insert the needle at a 45-90 degree angle, inject the solution slowly, wait 5 seconds, then withdraw the needle. Step 9: Dispose of the syringe immediately in a sharps container.