How Do I Rotate Injection Sites for a GLP-1 Medication?
FAQ-000009
Direct Answer
GLP-1 injections go into the fatty tissue just under the skin, subcutaneously, in one of three approved sites: the abdomen, the front of the thigh, or the back of the upper arm. Rotate which site you use each week, and move to a slightly different spot within that site each time, rather than injecting the exact same point repeatedly, since this reduces skin irritation and helps keep absorption consistent.
A Simple Rotation Pattern
Many patients find it easiest to rotate through the three approved sites in order, week to week, and within a site, move a couple of inches from the previous injection point each time. Keeping a simple log of where you last injected removes the guesswork.
Why Rotation Actually Matters
Repeated injections in the exact same small spot can lead to lipohypertrophy, a buildup of fatty tissue under the skin that can affect how well the medication absorbs. This isn't just a comfort issue, it can genuinely affect how consistently your medication works over time.
Practical Tips
Let a refrigerated pen come to room temperature before injecting, cold medication tends to sting more. Clean the site with an alcohol swab and let it air dry before injecting. Never share a pen or needle between people, even with a new needle attached, and always dispose of needles in a proper sharps container.
References
- AllyRx: GLP-1 Titration and Injection Basics
- TrimRx: GLP-1 Glossary
Related Resources
- Injection Tracker
- GLP-1 Medication Library
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