How to Inject Semaglutide and Tirzepatide at Home (2026)

Here's the short version. Most people inject compounded semaglutide or tirzepatide once a week, under the skin, into the belly, thigh, or back of the arm. You draw your prescribed dose into a small insulin syringe, clean the spot, pinch the skin, and inject straight in at a 90-degree angle. Then you rotate where you inject each week so the same spot never gets sore. This guide walks through every step, plus the mistakes to skip.

How to inject semaglutide, in short

Injecting a GLP-1 at home is a five-minute routine you do once a week. You draw your prescribed dose into an insulin syringe, pick a spot on your belly, thigh, or upper arm, clean it, pinch the skin, and inject into the fat just under the skin. It is meant to be simple, and most people feel little more than a quick pinch.

• Draw your exact prescribed dose into a U-100 insulin syringe.
• Pick a site: abdomen (2 inches from the navel), front or outer thigh, or the back of the upper arm.
• Clean with an alcohol swab and let it dry.
• Pinch the skin, insert the needle straight in at 90 degrees, and press the plunger slowly.
• Hold a few seconds, remove the needle, and drop the syringe in a sharps container.

Gather your supplies first

Set everything out before you open the vial so the injection goes smoothly. Compounded semaglutide and tirzepatide usually ship as a small vial of liquid plus insulin syringes, rather than as a prefilled pen. That means you measure your own dose, which is why the syringe markings matter.

Never reuse a needle. Each syringe is one use, then into the sharps bin. See your exact dose in the semaglutide dosage guide or the tirzepatide dosage guide.

Where to inject: three good spots

There are three reliable places to inject a GLP-1: the abdomen, the front or outer thigh, and the back of the upper arm. All three have a layer of fat just under the skin, which is exactly where the medication goes. The abdomen is the easiest to reach and gives steady absorption, so many people start there.

The step-by-step injection

Once your dose is drawn and your site is picked, the injection itself takes under a minute. Move slowly and steadily; there is no need to rush the plunger. Here is the full sequence from clean hands to a used syringe in the bin.

• Wash your hands with soap and water.
• Wipe the vial's rubber top with an alcohol swab and let it dry.
• Draw air into the syringe to your dose mark, push it into the vial, then flip the vial upside down and pull your exact prescribed dose of liquid.
• Tap out any large air bubbles and nudge them back into the vial.
• Clean your chosen skin site with a fresh alcohol swab and let it air-dry.
• Pinch a fold of skin gently between your thumb and finger.
• Insert the needle all the way, straight in at a 90-degree angle.
• Press the plunger down slowly and steadily until the dose is in.
• Wait about 5 seconds, then pull the needle straight out and release the pinch.
• Press with cotton if needed, then drop the whole syringe into your sharps container.

A quick sting or a tiny drop of blood is normal. If you feel a sharp, deep ache, you may have gone into muscle; next time use a shorter needle and pinch a bit more skin.

Rotate your site every week

Move to a fresh spot every single injection so no area gets overworked. Injecting the same patch week after week can cause lumps, hardening, or bruising under the skin, and those changes can make the medication absorb less evenly. A simple habit fixes it: shift at least one inch from your last spot, or switch regions entirely.

• Pick the same day each week so it becomes routine, morning or night, with or without food.
• Rotate in a pattern: for example, left belly, right belly, left thigh, right thigh, then back around.
• Keep a quick note or phone reminder of where you last injected.
• Give any tender or lumpy spot a few weeks off before using it again.

Measuring a dose from a vial

With compounded GLP-1s, you measure your own dose from a vial, so reading the syringe correctly is the most important safety step. Your prescriber tells you how many units to draw on a U-100 insulin syringe. Units are not the same as milligrams, so always follow the unit number on your pharmacy instructions, not a number you saw online.

Doses usually step up slowly over weeks to keep side effects mild. That gradual climb is covered in the semaglutide dosage guide and, if queasiness shows up, the nausea management guide.

Common mistakes to avoid

Most injection problems come from a handful of avoidable habits, and each has an easy fix. Getting these right keeps the routine painless and the dose accurate. Here are the ones people run into most.

How to throw away needles safely

Used needles go into a puncture-proof sharps container, never loose in the household trash. The FDA advises placing used needles in an FDA-cleared sharps container right after use, and if you cannot get one, a heavy-duty plastic container with a tight lid, like an empty laundry detergent jug, works as a stand-in.

• Drop the whole syringe in immediately after injecting; do not recap.
• When the container is about three-quarters full, seal it.
• Check your state's disposal rules; many pharmacies and clinics take full containers back.
• Keep the container out of reach of children and pets.

Disposal rules differ by state, so a quick check of your local program keeps you compliant and safe.

How common GLP-1 use has become

You are far from alone in learning this routine. GLP-1 medications have moved into the mainstream, and millions of adults now do a weekly at-home injection just like this one. Taking charge of your metabolic health this way is a smart, responsible move, and that instinct is worth trusting.

How pru handles your GLP-1

pru is a telehealth platform that makes the whole GLP-1 routine straightforward, from prescription to the syringe in your hand. You select the peptide you are interested in, a licensed physician reviews your health and confirms whether it fits, and an FDA-regulated 503A compounding pharmacy prepares and ships it.

The doctor confirms fit; the doctor does not pick the drug for you. pru exists to make the proactive, informed choice the accessible one, pairing licensed physicians and pharmacy-grade medicine with at-cost pricing, so you can take the next step whenever you are ready.

• Live weight-loss options: compounded semaglutide and compounded tirzepatide, both pharmacy-grade and prescribed after a physician review.
• Your kit ships with vials and insulin syringes plus dose-specific instructions, so you always inject the exact amount your prescriber set.
• Pricing is a flat membership around $50 a month, with the peptide billed at cost and itemized; a higher dose costs a little more, never a member markup. See pricing.

People sometimes ask about newer molecules like retatrutide and cagrilintide. Those are still investigational, not FDA-approved, and not available as a legitimate compounded product, so pru does not offer them and grey-market vials are worth avoiding. For a proven, prescribed option today, pru's weight-loss lineup centers on compounded semaglutide and tirzepatide.

Related reading

Keep going with these guides on dosing, side effects, and what to expect over time.

• Semaglutide dosage: how the schedule steps up
• Tirzepatide dosage guide
• Managing GLP-1 nausea
• Semaglutide side effects, explained
• Your GLP-1 weight-loss timeline
• Semaglutide vs tirzepatide compared
• Shop pru's weight-loss and metabolism options

Common questions