Where to Inject Ozempic & Wegovy (Semaglutide): Injection Sites & Technique (2026)

If you have just been prescribed Ozempic or Wegovy, the question you actually need answered is simple: where on my body do I inject it, and how? The FDA-approved prescribing information for both products gives the same answer. Semaglutide is injected subcutaneously (into the fat layer just under the skin) in one of three sites — the abdomen (stomach), the thigh, or the upper arm — once weekly, on the same day each week, at any time of day, with or without food.^[1][2] You rotate where you inject each week, you never inject into muscle or a vein, and you stay clear of the area right around your navel. This guide walks through each labeled site, the step-by-step technique, how and why to rotate, where you should not inject, the difference between the pen and the vial, and the common mistakes worth avoiding. For the medications themselves, see our Ozempic drug page and Wegovy drug page. None of this replaces the device Instructions for Use (IFU) in your box or the guidance of your prescriber and pharmacist.

The three FDA-labeled injection sites

Both the Ozempic and Wegovy labels specify the same three subcutaneous injection sites. “Subcutaneous” means into the layer of fat just beneath the skin — not into muscle, and not into a vein. All three sites have enough subcutaneous fat to absorb the medication reliably, and the FDA label treats them as interchangeable: there is no “required” site, and you may use any of the three at each weekly dose.^[1][2]

A quick fix to the most common typo in that table for your own notes: the thigh site is the fleshy mid-front of the upper leg. The practical takeaway is that the abdomen is the default for most people who self-inject, the thigh is a comfortable second choice when seated, and the upper arm generally works best when someone is helping you. Whichever you choose, the medication goes into the fat just under the skin.

Step-by-step injection technique

The exact steps differ slightly between the prefilled pen and the single-dose vial, but the core sequence below follows the FDA label's administration instructions. Always use the Instructions for Use that came in your box as the authoritative source — device designs change, and the IFU is matched to your exact pen or vial.^[1][2][3]

1. Wash your hands with soap and water and gather your supplies: your pen (or vial and syringe), a new needle, and an alcohol swab.
2. Inspect the medication. The liquid should be clear and colorless. Do not use it if it is cloudy, discolored, or has particles in it.
3. Choose and clean your site. Pick one of the three labeled sites — abdomen, thigh, or upper arm — at a fresh spot you have not used recently. Wipe the skin with an alcohol swab and let it air-dry.
4. Attach a new needle (for the pen) and, where your IFU directs, check the dose flow / prime the pen. Use a new needle for every single injection — never reuse one.
5. Dial or confirm the correct dose shown in your IFU. For the pen, confirm the dose window reads the prescribed amount before injecting.
6. Pinch up a fold of skin if your IFU calls for it, then insert the needle into the subcutaneous fat. Inject the dose at a steady pace until the device or syringe signals the dose is complete.
7. Hold, then withdraw. Keep the needle in place for the number of seconds your IFU specifies (often several seconds for a pen) so the full dose is delivered, then remove the needle straight out.
8. Dispose of the needle safely in an FDA-cleared sharps container — never in household trash. Note the site you used so you can rotate next week.

Rotating injection sites — and why it matters

The FDA label instructs patients to rotate the injection site with each weekly dose.^[1][2] Rotation means not injecting into the exact same spot of skin week after week. Repeatedly injecting the same patch of tissue can cause lipohypertrophy — lumpy, thickened fat under the skin — which is not only uncomfortable and cosmetically noticeable but can also make absorption of the medication less predictable. Rotation also reduces local bruising, soreness, and irritation.

A simple, reliable approach is to move between the three labeled regions and, within each region, shift to a fresh spot at least an inch or so from your last injection. For example: abdomen one week, thigh the next, and so on, keeping a small log of where you went. Our GLP-1 injection site rotation calendar gives you a ready-made weekly pattern so you never have to remember which site is next.

• Move between regions weekly. Cycle among abdomen, thigh, and upper arm rather than staying on a favorite.
• Shift within a region. Even when you reuse a region, pick a new spot at least roughly an inch from the previous injection.
• Keep a log. A calendar or notes app entry for each week's site prevents accidental repetition.
• Inspect old sites. If a previously used area is lumpy, firm, or tender, let it heal and avoid it until it is back to normal.

Where NOT to inject

Just as important as the right sites are the spots and tissues to avoid. The FDA label and standard subcutaneous-injection practice point to a clear no-go list:

• Within about 2 inches (5 cm) of the navel. On the abdomen, stay clear of the area immediately around the belly button.
• Into muscle or a vein. The FDA label states semaglutide must not be administered intramuscularly or intravenously — it is a subcutaneous-only injection.^[1][2]
• Skin that is bruised, scarred, or damaged. Avoid bruises, scars, stretch marks, surgical scars, or broken skin, which can affect absorption and healing.
• Skin that is tender, red, hard, or lumpy. Steer clear of areas that are sore, inflamed, or show lipohypertrophy from prior injections — let them recover first.
• The inner thigh, the knee, and the wrist/hand side of the arm. Stay on the fleshy front/outer thigh and the back of the upper arm; avoid thin-skinned or bony areas.

Pen vs vial: does the device change where you inject?

Ozempic is supplied as a multi-dose prefilled pen. Wegovy is available as a single-dose prefilled pen and, in some channels, as a single-dose vial used with a separate syringe. Compounded semaglutide is most often dispensed as a vial. Here is the key point: the device does not change the three labeled injection sites or the subcutaneous-only rule. Whether you use a pen or a vial, you still inject into the abdomen, thigh, or upper arm, into the fat just under the skin, and you still rotate.^[1][2][3]

• Prefilled pen. You attach a new needle, confirm or dial the dose in the window, press against the cleaned skin, and hold for the specified seconds. The pen meters the dose for you, which is why it is the most error-resistant option for most people.
• Vial and syringe. You draw the prescribed dose into a syringe yourself, which means the volume must be measured exactly per your IFU and prescriber instructions. Dosing errors are more likely with vials, so double-check the units before injecting and never improvise a dose.

Because vial dosing is manual, it is the route where mistakes happen most — both the FDA and pharmacy boards have flagged compounded-semaglutide vial dosing errors. If you are on a vial, confirm your exact dose and the correct syringe markings with your prescriber or pharmacist before your first injection.

Common mistakes and when to call your provider

Most injection problems are minor and avoidable. The ones worth knowing:

• Reusing needles. Use a new, sterile needle for every injection. Reused needles are dull, hurt more, and raise infection risk.
• Injecting into the same spot. Skipping rotation is the leading cause of lumps (lipohypertrophy) and unpredictable absorption.
• Injecting too close to the navel. Keep abdominal injections at least ~2 inches (5 cm) from the belly button.
• Rubbing the site afterward. Don't massage the injection site; press gently if needed but do not rub.
• Using cloudy or expired medication, or a pen that has been frozen or stored incorrectly — inspect every time.
• Guessing the dose on a vial. Measure exactly per your IFU; if the markings are confusing, ask your pharmacist before injecting.

Call your prescriber, pharmacist, or seek care if you notice signs of infection at a site (spreading redness, warmth, pus, or fever); a lump that does not resolve; persistent bleeding or severe bruising; an allergic reaction (rash, swelling, trouble breathing); a suspected wrong dose or a missed-dose question; or severe or persistent nausea, vomiting, severe abdominal pain (a possible sign of pancreatitis), or symptoms of low blood sugar. When in doubt about technique or a reaction, your prescriber and pharmacist are the right people to ask — and a telehealth provider such as Found or Ro can typically answer device and dosing questions between visits. You can also compare programs on our list of the best semaglutide providers.