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Draw. Check. Inject. Rotate.
How to inject tirzepatide from a vial, step by step
By the NexLife Medical Team · Medically reviewed by Adam Kennah, MD · Updated
Draw your prescribed units into a new U-100 insulin syringe and inject under the skin of your stomach or thigh, changing spots every week. Your units depend on your vial’s strength, so check your pharmacy label and follow your provider’s instructions. NexLife answers questions about your vial 24/7: call or text
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- Your pharmacy label and your provider’s instructions come first
- At 10 mg/mL, 2.5 mg is 25 units
- Stomach or thigh; a helper can use your upper arm
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At a glance
Tirzepatide injection basics: syringe, site, units and vial life
| Question | Answer |
|---|---|
| What do you inject with? | A new U-100 insulin syringe every time, big enough to hold your whole dose. |
| Where do you inject it? | Under the skin of your stomach (at least 2 inches from your belly button) or thigh. A helper can use the back of your upper arm. |
| How many units? | Your dose in mg ÷ your vial’s strength in mg/mL × 100. For example, at 10 mg/mL, 2.5 mg is 25 units. Your label decides. |
| How long do you hold the needle in? | At least 5 seconds after you push the plunger all the way in. |
| How long does an opened vial last? | Throw it out 28 days after its first dose, even with medicine left, or sooner if its label says so. |
| Questions about your vial? | At NexLife, call or text |
- Tell us about you About 3 minutes of health questions
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Key takeaways
- Inject tirzepatide under the skin of your stomach or thigh, with a new U-100 insulin syringe every time.
- Units depend on your vial’s strength: 2.5 mg is 25 units at 10 mg/mL, but 12.5 units at 20 mg/mL.
- Change spots every week. On your stomach, stay at least 2 inches from your belly button.
- Throw out an opened vial no later than 28 days after its first dose, even with medicine left.
- No site is proven to cause less nausea. The Zepbound label says blood levels are similar from all three sites.
- At NexLife, compounded tirzepatide is $139 a month on the 12-month plan, and vial questions get answers 24/7.
What you need
What do you need to inject tirzepatide from a vial?
Six things, set out on a clean surface before you start. Lilly’s instructions for its Zepbound vial list the same basics.
Your vial
Check its label: the medicine’s name, its strength in mg per mL and its beyond-use date.
A new U-100 insulin syringe
One for every dose, needle attached, big enough to hold your units. Use the one your pharmacy or provider recommends.
Alcohol swabs
A fresh one each time, to wipe the vial’s rubber stopper.
Gauze or a cotton ball
To press on the spot if you see a little blood.
A sharps container
An FDA-cleared one, or a heavy-duty plastic household container with a tight, puncture-resistant lid.
Your prescription
Your dose in mg, and how many units that is with your vial.
Which syringe size? One that holds your whole dose in a single draw. A 0.3 mL syringe holds 30 units, 0.5 mL holds 50 and 1 mL holds 100. On many 1 mL syringes, each line is 2 units. For the 0.5 mL dose in its single-dose vial, Lilly gives a 1 mL syringe as the example.
Step by step
How do you draw and inject tirzepatide from a vial?
These steps follow Lilly’s instructions for its Zepbound vial (revised April 2026), adapted for a vial that holds several doses. Your pharmacy label and your provider’s instructions come first: if they differ, follow them.
Before you start
- Check the label. The right medicine, the strength you expect, and not past its beyond-use date or 28 days from your first dose out of it.
- Look at the liquid. Don’t use it if it’s cloudy, has particles or has ever been frozen. Red or pink usually means added vitamin B12; color doesn’t tell you the strength.
- Wash your hands with soap and water.
Then, 10 steps
Wipe the rubber stopper
The first time, pull off the plastic cap, but leave the rubber stopper in place. Every time, wipe the stopper with a new alcohol swab.
Uncap a new syringe
Use a new needle and syringe for every dose. Pull the needle cap straight off.
Pull in air to your dose
Hold the syringe with the needle pointing up. Pull the plunger down to your number of units (how many?), so the syringe holds that much air.
Push the air into the vial
Push the needle through the rubber stopper, then push the plunger all the way in. Lilly says this makes the liquid easier to draw.
Draw a little past your dose
Turn the vial and syringe upside down. Keep the needle tip in the liquid, and slowly pull the plunger a little past your units line.
Tap out bubbles, then set your dose
Tap the syringe gently so any bubbles rise to the top. Slowly push the plunger up to exactly your units line, and check it against your prescription.
Take the needle out of the vial
Pull the syringe straight out. Never leave a needle in the stopper. Put the vial back where its label says to store it.
Choose your spot
Your stomach, at least 2 inches from your belly button, or your thigh. A helper can use the back of your upper arm. Pick a different spot from last week.
Inject, then hold
Insert the needle the way your provider showed you, pinching the skin only if they told you to. Push the plunger all the way in, and keep the needle in for at least 5 seconds.
Finish safely
Pull the needle out. If you see blood, press the spot with gauze; don’t rub it. Don’t recap the needle: put the syringe straight into your sharps container.
The steps above, in short: from checking the label to the sharps container. Your pharmacy label and your provider’s instructions come first.
What’s different with a multi-dose vial
You draw units, not a set 0.5 mL
Each Zepbound single-dose vial holds one 0.5 mL dose (50 units on a U-100 syringe). In a multi-dose vial, your units depend on your dose and your vial’s strength.
You go back in every week
So it’s a new needle and syringe and a fresh swab on the stopper every time, and no needle left in the stopper between doses.
Date it the first time
Write the date of your first dose on the vial or its box. Throw the vial out 28 days later, even with medicine left, or sooner if its label says so.
Lilly’s KwikPen is a different device
It’s a 4-dose pen, 0.6 mL a dose, with its own instructions (Lilly’s single-dose vial holds one 0.5 mL dose). A compounded vial follows its pharmacy label and the FDA’s 28 days.
“Discard the vial within 28 days after the first use, even if medication remains in the vial.”
U.S. Food and Drug Administration, FDA’s Concerns with UnapprovedGLP-1 Drugs Used for Weight Loss
Not sure about a step? Ask before you inject.
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Units
How many units of tirzepatide do you draw?
It depends on your vial’s strength. On a U-100 insulin syringe, 100 units is 1 mL, so units = your dose in mg ÷ your vial’s strength in mg/mL × 100.
| Vial strength | 2.5 mg dose | 5 mg dose | Each unit holds |
|---|---|---|---|
| 5 mg/mL | 50 units | 100 units a full 1 mL syringe | 0.05 mg |
| 10 mg/mL | 25 units | 50 units | 0.1 mg |
| 15 mg/mL | 16.7 units | 33.3 units | 0.15 mg |
| 20 mg/mL | 12.5 units | 25 units | 0.2 mg |
| 25 mg/mL | 10 units | 20 units | 0.25 mg |
| 30 mg/mL | 8.3 units | 16.7 units | 0.3 mg |
Swipe the table sideways to see every column.
Units on a U-100 insulin syringe (100 units = 1 mL) for the first two doses on the Zepbound label. Find the strength on your vial’s label, in mg per mL. Example math only: your prescription sets your dose.
50 units on a U-100 syringe is 0.5 mL. How much medicine that holds depends on the vial’s strength, so give your provider the milligrams on your label, not the units.
Got a fraction, like 16.7 units? That’s hard to measure on a syringe marked in whole or half units. Ask your provider or pharmacy exactly what to draw before you inject.
Need another dose or strength? Our tirzepatide dosage chart has every dose from 2.5 mg to 15 mg at six strengths, and a converter for any vial. Past the step-ups? Read about the tirzepatide maintenance dose.
Where to inject
Where do you inject tirzepatide?
Under the skin of your stomach or thigh. Someone else can use the back of your upper arm. Change the spot every week, even if you stay in the same area.
Stomach
You or a helper. Stay at least 2 inches from your belly button.
Thigh
You or a helper. Easy to see when you inject yourself.
Back of the upper arm
A helper only: Lilly says another person should give this one.
“Inject ZEPBOUND subcutaneously in the abdomen, thigh, or another person should inject in the back of the upper arm. Rotate injection sites with each dose.”
Eli Lilly and Company, Zepbound (tirzepatide) prescribing information, revised February 2026, on Drugs@FDA
A rotation map: four spots, one a week
- Week 1Stomach, left of your belly button
- Week 2Stomach, right of your belly button
- Week 3Left thigh
- Week 4Right thigh
Then start again, at least an inch from the spot you used last time in that area. Have a helper? Add the back of each upper arm. A note on your phone with the date and the spot makes the next one easy.
- Skip skin that’s tender, bruised, scaly or hard, and any scars or damaged skin.
- Skip spots with pits, thickened skin or lumps. Lilly says changing spots each week lowers the risk of them.
- Under the skin only, never into a muscle or a vein.
- Other injections, like insulin? Use a different spot, and never mix medicines in one syringe.
Site and nausea
Does the tirzepatide injection site affect nausea?
Not that anyone has shown. We found no study comparing nausea by injection site (we searched on October 22, 2026), and the label points to no difference.
What the label says. The Zepbound prescribing information says tirzepatide reaches similar levels in the blood whether it’s injected in the stomach, thigh or upper arm.
“Similar exposure was achieved with subcutaneous administration of tirzepatide in the abdomen, thigh, or upper arm.”
Eli Lilly and Company, Zepbound (tirzepatide) prescribing information, revised February 2026, on Drugs@FDA
What does matter is the dose. In two Zepbound trials, nausea was the most common side effect: 25% to 29% of people on 5 mg to 15 mg had it, against 8% on placebo. Most of it came while the dose was going up, and it eased over time. These trials studied FDA-approved Zepbound; compounded tirzepatide wasn’t studied.
So choose the spot that’s easiest for you. If one area seems to suit you better, you can keep using it, at a new spot each week.
Nausea that won’t go away? Tell your provider, since vomiting or diarrhea can dehydrate you. What helps, and when to call: tirzepatide side effects.
Skin reactions
What tirzepatide injection-site reactions are normal?
A little soreness where you injected is expected, NIH’s MedlinePlus says. Here’s what the Zepbound label lists, and when to get help.
How common? In two Zepbound trials, 6% to 8% of people on Zepbound had an injection-site reaction, against 2% on placebo: bruising, redness, itching, pain or a rash where they injected. These trials studied FDA-approved Zepbound; compounded tirzepatide wasn’t studied.
| What you notice | What to do |
|---|---|
| A little blood as the needle comes out | Press the spot with gauze or a cotton ball. Don’t rub it. |
| Soreness, redness or itching that fades | Keep changing spots. Tell your provider if it bothers you or doesn’t go away. |
| Pits, thickened skin or a lump where you often inject | Don’t inject there. Move to another area, and tell your provider. |
| Redness or swelling that spreads, red streaks or a fever | These can be signs of an infection. Call your provider. |
| Severe stomach pain that won’t go away with or without vomiting | Stop tirzepatide and call your provider right away. It can be a sign of pancreatitis. |
| Signs of a serious allergic reaction: swelling of your face, lips, tongue or throat; trouble breathing or swallowing; fainting or dizziness; a very fast heartbeat; a severe rash or itching | Stop tirzepatide and get medical help right away: call 911. |
Swipe the table sideways to see every column.
From Lilly’s Zepbound Medication Guide and vial instructions (signs of infection from NIH’s MedlinePlus). Your provider’s instructions come first.
Avoid these
What are common mistakes with tirzepatide vials?
Most come down to units, needles and storage. The FDA has had reports of people measuring and injecting the wrong dose of compounded semaglutide, some of whom needed hospital care. The same math applies to tirzepatide.
- Mixing up mL and units. On a U-100 syringe, 0.25 mL is 25 units. Your dose is in mg, your syringe counts units, and your vial’s strength links the two.
- Not rechecking a new vial. A new strength changes your units: 2.5 mg is 25 units at 10 mg/mL but 12.5 units at 20 mg/mL.
- Reading the wrong lines. On many 1 mL syringes, each line is 2 units, not 1.
- Reusing a needle or syringe. Even on yourself. It can carry germs into your vial, the FDA warns, and Lilly adds that a used needle can block.
- Leaving a needle in the stopper. The CDC warns that it gives germs a way into the vial. Take it out every time.
- Using a vial that froze or arrived warm. Don’t, even if a frozen vial has thawed. Keep it and the box, and contact the program that prescribed it.
- Going past day 28. Throw out an opened vial 28 days after its first dose, even with medicine left, or sooner if its label says so.
- Recapping a needle, or tossing it in the trash. Recapping can stick you. Put the syringe straight into a sharps container, never loose in the trash or recycling.
Think you injected too much? Call your provider or Poison Help at 1-800-222-1222, or go to the nearest emergency room right away, as the Zepbound Medication Guide says.
At NexLife
Questions about your vial? Call or text us, 24/7
Questions about your vial, your units or your label come to us, not the pharmacy. Real people answer at
Before your first dose
Call or text, and we’ll talk you through it, one step at a time.
If your label doesn’t match
Text us a photo of the label. We check with your provider and the pharmacy, and get back to you before your next dose.
If a delivery arrives warm
Don’t use it. Keep the vial and the box, and call or text us. We talk to the pharmacy for you.
Medical questions
We get your question to your provider. Physicians answer medical questions during clinical hours.
New to tirzepatide? Start with a short online assessment, about 3 minutes. A licensed provider reviews it and prescribes only if treatment is right for you. Compounded tirzepatide is $139 a month on the 12-month plan, or $169 month to month, the same at every dose. To compare programs, see tirzepatide cost at each dose.
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Tirzepatide
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Injecting tirzepatide: your questions
Fair questions about NexLife
- Will my price go up with my dose?
- No. You pay the same at every dose.
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- You aren’t charged for medication.
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- Yes, by email. It takes effect 30 days after we receive it. Plans renew until you cancel; our cancellation policy has the details.
- Do I need insurance?
- No. Pay with an HSA or FSA card, or with Affirm, Klarna or Afterpay at checkout.
How do you inject tirzepatide from a vial?
Draw your prescribed units into a new U-100 insulin syringe and inject under the skin of your stomach or thigh, changing spots every week. Wipe the vial’s stopper first, push in air equal to your dose, tap out any bubbles, and keep the needle in for at least 5 seconds. Your pharmacy label and your provider’s instructions come first.
Where is the best place to inject tirzepatide?
Your stomach or thigh, whichever is easier for you; a helper can use the back of your upper arm. The Zepbound label says tirzepatide reaches similar levels in the blood from all three. Change spots every week, and stay at least 2 inches from your belly button.
Does the injection site affect nausea?
Not that any study has shown: we found none comparing nausea by injection site. The Zepbound label says tirzepatide reaches similar levels in the blood from the stomach, thigh or upper arm. The dose matters more: in Zepbound’s trials, most nausea came while the dose was going up. Those trials studied FDA-approved Zepbound; compounded tirzepatide wasn’t studied.
What size syringe do I need for tirzepatide?
A U-100 insulin syringe that holds your whole dose in a single draw: a 0.3 mL syringe holds 30 units, 0.5 mL holds 50 and 1 mL holds 100. On many 1 mL syringes, each line is 2 units. Use the one your pharmacy or provider recommends, and a new one for every dose.
How many units is 2.5 mg of tirzepatide?
It depends on your vial’s strength: at 10 mg/mL, 2.5 mg is 25 units on a U-100 syringe. At 15 mg/mL it’s about 16.7 units, and at 20 mg/mL it’s 12.5. Check the strength on your label; every dose is in our dosage chart.
Should I pinch the skin?
Do what your provider showed you: Lilly’s instructions say your healthcare provider should tell you whether to pinch. NIH’s MedlinePlus guide to under-the-skin shots pinches about an inch of skin and fat, not muscle. If no one has shown you, ask before your first dose; at NexLife, call or text
What if I see blood or a bump after injecting?
A little blood or a small bump can happen. Press the spot with gauze or a cotton ball; don’t rub it. A bump, redness or itching can be an injection-site reaction: tell your provider if it doesn’t go away. Call your provider about spreading redness, red streaks or a fever, and 911 for face or throat swelling or trouble breathing.
Can I reuse a syringe?
No. Use a new needle and syringe for every dose, even on yourself. The FDA says reusing them can contaminate the medicine in your vial, and Lilly says a new one each time prevents infections and blocked needles. Put each used syringe straight into a sharps container, without recapping it.
Do I need to wipe my skin with alcohol?
Follow what your provider showed you. Lilly’s vial steps wipe the vial’s rubber stopper, not your skin; NIH’s MedlinePlus guide to under-the-skin shots also wipes the spot with an alcohol pad and lets it air-dry. Either way, wipe the stopper with a new alcohol swab every time.
How long is an opened tirzepatide vial good for?
Throw it out 28 days after its first dose, even with medicine left, or sooner if its label says so. Write the date of your first dose on the vial or its box; the FDA says to discard a vial within 28 days after first use.
Why is my compounded tirzepatide pink or red?
Red or pink usually means added vitamin B12, and color doesn’t tell you the strength, so check the strength on your label. Don’t use a vial that’s cloudy, has particles or has ever been frozen.
What should I do if I inject too much tirzepatide?
Call your provider or Poison Help at 1-800-222-1222, or go to the nearest emergency room right away, as the Zepbound Medication Guide says. To avoid it, recheck every new vial: 2.5 mg is 25 units at 10 mg/mL but 12.5 units at 20 mg/mL.
Important safety information
Compounded tirzepatide and semaglutide are not FDA-approved, and the FDA hasn’t reviewed them for safety, effectiveness or quality. A provider prescribes them only when they offer a significant difference for you compared with an FDA-approved product. Both medicines may cause thyroid tumors, including cancer: don’t use either if you or a family member has had medullary thyroid carcinoma (MTC) or multiple endocrine neoplasia syndrome type 2 (MEN 2).
Read the full safety information
In studies with rodents, both medicines caused thyroid tumors; it isn’t known whether they cause them in people. Tell your provider if you notice a lump or swelling in your neck, hoarseness, trouble swallowing or shortness of breath. Serious side effects can include inflammation of the pancreas (pancreatitis), gallbladder problems, low blood sugar (especially with insulin or sulfonylureas), kidney problems from dehydration, severe stomach problems, serious allergic reactions, vision changes in people with type 2 diabetes, and a faster heart rate. Tell your care team before any surgery or procedure that uses anesthesia or deep sedation. Don’t combine either medicine with other
Tirzepatide can make birth control pills less effective: switch to a non-oral method, or add a barrier method such as condoms, for 4 weeks after you start and for 4 weeks after each dose increase. Both medicines may harm an unborn baby. Semaglutide should be stopped at least 2 months before a planned pregnancy. Tell your provider right away if you’re pregnant, planning to be, or breastfeeding.
This is a summary, not the complete safety information. Read the full Prescribing Information for FDA-approved tirzepatide (Zepbound) and semaglutide (Wegovy), and talk with your provider. You can report side effects to the FDA at
† NexLife Price Match Guarantee: for new NexLife members switching from a licensed U.S. telehealth provider or clinic with an active prescription for compounded tirzepatide or semaglutide. We match your regular all-in monthly price there (medication plus any required membership, program or visit fee, on a month-to-month plan); first-month offers, coupons, referral credits and prepaid multi-month rates aren’t matched. Proof from the last 60 days required. A licensed provider must determine that treatment is right for you. Not open to people with Medicare, Medicaid or TRICARE coverage. Full terms.
About NexLife. NexLife is a telehealth and care-coordination platform. Care is delivered through affiliated, physician-owned medical groups, and licensed providers decide whether treatment is right for you. NexLife doesn’t make or compound medication: state-licensed partner pharmacies fill each prescription, and we coordinate the rest. Available only in states where our affiliated providers are licensed.
Who wrote and medically reviewed this page?
Leads the NexLife Medical Team, which writes and medically reviews NexLife’s guides, including this one.
Labels and FDA, CDC and NIH guidance read November 1, 2026.
- How we checked. The steps follow Lilly’s Instructions for Use for its Zepbound single-dose vial (revised April 2026), adapted for multi-dose vials with the FDA’s and the CDC’s guidance. Injection sites, skin reactions and when to get help come from the Zepbound prescribing information and Medication Guide (both revised August 2026), Lilly’s KwikPen instructions and NIH’s MedlinePlus. We read them all on November 1, 2026, and searched the medical literature the same day for a study comparing nausea by injection site; we found none. We don’t give doses: your prescription sets your units.
- Every fact, sourced. Each price and rule links to the page it comes from.
- How we make money. NexLife is a telehealth and care-coordination platform. We earn revenue when people join NexLife.
- Corrections, fast. See something wrong or out of date? Email care@nexlife.us and we’ll fix it.
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Sources
- Zepbound (tirzepatide) single-dose vial: Instructions for Use, Eli Lilly (revised April 2026). Read November 1, 2026.
- Zepbound (tirzepatide) prescribing information, Eli Lilly (revised August 2026). Read November 1, 2026.
- Zepbound Medication Guide, Eli Lilly (revised August 2026). Read November 1, 2026.
- Zepbound KwikPen: Instructions for Use, Eli Lilly (revised January 2026). Read November 1, 2026.
- FDA: concerns with unapproved
GLP-1 drugs used for weight loss (updated October 1, 2026). Read November 1, 2026. - CDC: preventing unsafe injection practices (multi-dose vials). Read November 1, 2026.
- FDA: safely using sharps (needles and syringes) at home, at work and on travel. Read November 1, 2026.
- MedlinePlus (NIH): subcutaneous (SQ) injections (reviewed October 19, 2025). Read November 1, 2026.
- NexLife: pricing, every plan. Checked November 1, 2026.
- NexLife: Price Match Guarantee† terms.
- Eli Lilly and Company, on Drugs@FDA. Zepbound (tirzepatide) prescribing information, revised February 2026.
- U.S. Food and Drug Administration. FDA alerts health care providers, compounders and patients of dosing errors associated with compounded injectable semaglutide products. July 26, 2024.
- U.S. Food and Drug Administration. Compounding and the FDA: Questions and Answers.
- U.S. Food and Drug Administration. MedWatch: The FDA Safety Information and Adverse Event Reporting Program.