The tesamorelin label specifies one injection region: the abdomen, subcutaneously, once daily. Rotating the site each day is not optional. Repeated injections into one spot damage the subcutaneous tissue and change how the drug is absorbed.
Tesamorelin is injected subcutaneously into the abdomen, once daily, with the injection site rotated each day [1]. The abdomen is the region the FDA label specifies, and rotation exists to protect the subcutaneous tissue from repeated trauma at one spot. This is technique a prescriber sets up with you, not a protocol to improvise from a forum post.
- Approved route and site: subcutaneous, into the abdomen, once daily [1]
- Rotate the injection site each day to protect the tissue [1][2]
- Avoid scar tissue, the navel, and bruised or reddened skin [2]
- Use a new needle for every injection [2]
- Tesamorelin is prescriber-directed; it is approved only for HIV-associated lipodystrophy [1]
The Approved Injection Site
The tesamorelin label directs subcutaneous injection into the abdomen [1]. Subcutaneous means into the fat layer just under the skin, not into muscle. The abdomen offers a consistent subcutaneous depth, which is why it is the specified region for this drug.
Within the abdomen, stay a couple of inches away from the navel and off any area of scar tissue, stretch marks, bruising, or irritation. Injecting into damaged or scarred tissue changes absorption and adds to local injury. Pick clean, healthy skin each time.
- Region: the abdomen, per the label [1]
- Depth: subcutaneous fat, not intramuscular
- Stay clear of the navel by roughly two inches
- Avoid scars, stretch marks, bruises, and inflamed skin
How to Rotate Sites
Rotation is the part people skip, and it is the part that protects the tissue. Injecting the same spot repeatedly can cause local changes that alter how the drug absorbs. Injection-technique guidance for subcutaneous drugs recommends rotating sites systematically, spacing consecutive injections apart, and using each needle only once [2].
- Map the abdomen as a grid of injection points around, but away from, the navel
- Move to a fresh point each day rather than reusing yesterday's spot
- Space consecutive injections at least a finger-width apart
- Track which areas you have used so you do not return too soon
- Give any spot several days before injecting near it again
Repeated injections into one area damage the subcutaneous tissue over time and can change absorption. Systematic rotation across the abdomen keeps each injection landing in healthy tissue [2].
Safe Technique, Step by Step
The mechanics are standard for a subcutaneous injection, and doing them the same way each time reduces local reactions. A prescriber or pharmacist should walk you through this with your actual device before your first dose.
- Wash your hands and let the reconstituted solution reach the temperature your prescriber specified
- Clean the chosen abdominal site and let the skin dry
- Pinch a fold of skin to lift the subcutaneous fat away from muscle
- Insert the needle at the angle your prescriber directs for your device
- Inject slowly, withdraw, and apply gentle pressure without rubbing
- Dispose of the needle in a sharps container; never reuse it [2]
Why This Is Not a DIY Drug
Injection technique is the easy part. The reason tesamorelin belongs under a prescriber is upstream of the needle. Tesamorelin is FDA-approved only for reducing excess abdominal fat in adults with HIV-associated lipodystrophy [1], and it drove a large IGF-1 rise in its trials, with IGF-1 increasing about 81% over 26 weeks [3]. A response that size needs lab monitoring, not guesswork.
Compounded peptides sold outside that indication are a separate issue. Compounded drugs are not FDA-approved, which means FDA does not verify their safety, effectiveness, or quality before they are marketed [4]. Buying a vial and self-injecting from an online source skips the baseline labs, the dosing oversight, and any check on what is actually in the vial.
The injection site is a detail. The prescriber, the baseline IGF-1, and a legitimate pharmacy source come first. If a seller offers the vial without any of those, that is the red flag, not the needle angle.
A Note for Competing Athletes
GHRH analogs are prohibited in tested sport. Tesamorelin appears on the 2026 WADA Prohibited List under section S2.2.4, growth hormone releasing factors [5], banned at all times, in and out of competition. Correct injection technique does not change that status.
The safe version of GH-axis therapy starts before the first injection. SystemLabs runs a baseline IGF-1 and prescribes compounded sermorelin through a physician, so the protocol is monitored from the start rather than improvised from an online purchase.
Bottom Line
Frequently Asked Questions
Where do you inject tesamorelin?
Tesamorelin is injected subcutaneously into the abdomen, once daily, per the FDA label [1]. Subcutaneous means into the fat layer just under the skin, not into muscle. Stay about two inches from the navel and avoid scar tissue, stretch marks, bruises, and irritated skin. Rotate to a fresh spot each day.
Do you have to rotate tesamorelin injection sites?
Yes. Rotating the site each day protects the subcutaneous tissue from repeated trauma at one spot, which can otherwise change how the drug absorbs. Injection-technique guidance recommends rotating systematically, spacing consecutive injections apart, and using each needle only once [2]. Map the abdomen as a grid and move to a new point daily.
Can you inject tesamorelin in the thigh or arm?
The tesamorelin label specifies subcutaneous injection into the abdomen [1]. That is the region studied and approved for this drug. If you have any question about site selection, that is a conversation for the prescribing physician rather than a substitution made on your own.
Can I inject tesamorelin at home by myself?
Tesamorelin is a self-administered subcutaneous injection, but it is prescriber-directed. It is FDA-approved only for HIV-associated lipodystrophy [1], and it produces a large IGF-1 rise that needs lab monitoring [3]. A prescriber or pharmacist should train you on your specific device before your first dose. Buying a vial online and self-injecting skips the labs and oversight that make it safe.
Is compounded tesamorelin the same as the approved drug?
No. Compounded peptides are not FDA-approved, which means FDA does not verify their safety, effectiveness, or quality before they are marketed [4]. The approved product is EGRIFTA, indicated for HIV-associated lipodystrophy [1]. Quality of a compounded version depends entirely on the pharmacy, which is why 503A or 503B sourcing and a real prescriber matter.
References
- EGRIFTA SV (tesamorelin) for injection, for subcutaneous use: full prescribing information DailyMed, U.S. National Library of Medicine, 2010. Initial U.S. Approval: 2010. https://dailymed.nlm.nih.gov/dailymed/drugInfo.cfm?setid=3d783378-b02d-4f19-99dd-0fc91a042224
- New insulin delivery recommendations Mayo Clinic Proceedings, 2016. PMID: 27594187. https://pubmed.ncbi.nlm.nih.gov/27594187/
- Metabolic effects of a growth hormone-releasing factor in patients with HIV New England Journal of Medicine, 2007. PMID: 18057338. https://pubmed.ncbi.nlm.nih.gov/18057338/
- Compounding and the FDA: questions and answers FDA.gov, Human Drug Compounding, 2025. Content current as of 09/16/2025. https://www.fda.gov/drugs/human-drug-compounding/compounding-and-fda-questions-and-answers
- The 2026 Prohibited List: International Standard, section S2.2.4 growth hormone releasing factors World Anti-Doping Agency, 2026. WADA 2026 Prohibited List. https://www.wada-ama.org/en/resources/2026-prohibited-list
