How to Administer Zepbound (Tirzepatide): The Step-by-Step Injection Protocol That Minimizes Pain and Maximizes Absorption

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> Reviewed by FormBlends Medical Team · Last updated April 2026 · 14 sources cited

Key Takeaways

• Zepbound is administered as a subcutaneous injection once weekly using a single-dose prefilled pen injected into the abdomen, thigh, or upper arm at a 90-degree angle
• The medication must stay refrigerated until use, warmed to room temperature for 30 minutes before injection, and injected within 21 days of first pen use
• Proper site rotation across 8 distinct zones prevents lipohypertrophy, the most common cause of erratic absorption and injection-site reactions
• The pen delivers a fixed dose automatically over 5 to 10 seconds; manual injection speed control is not possible and attempting to remove the pen early wastes medication

Direct answer (40-60 words)

Zepbound is administered as a subcutaneous injection once weekly. Remove the pen from refrigeration 30 minutes before use. Clean the injection site with alcohol. Remove both pen caps. Press the pen firmly against skin at a 90-degree angle on the abdomen, thigh, or upper arm. Press and hold the button until the yellow bar stops moving (5 to 10 seconds). Rotate injection sites weekly.

Table of contents

1. The 60-second injection overview
2. What most articles get wrong about subcutaneous injection depth
3. Pre-injection preparation: the 30-minute rule and why it matters
4. Step-by-step injection protocol
5. The 8-zone rotation strategy that prevents lipohypertrophy
6. Injection site selection: abdomen vs thigh vs upper arm
7. The 4 injection errors that cause most adverse reactions
8. What to do if you see blood, bruising, or leakage
9. Needle safety and pen disposal
10. Timing your weekly dose: does the day or time matter?
11. Traveling with Zepbound: TSA rules and temperature management
12. When compounded tirzepatide administration differs from brand-name
13. FAQ
14. Sources

The 60-second injection overview

Zepbound comes as a single-dose prefilled pen. Each pen contains one weekly dose (2.5 mg, 5 mg, 7.5 mg, 10 mg, 12.5 mg, or 15 mg). The pen is designed for one-time use and cannot be refilled.

The injection process:

1. Remove pen from refrigerator 30 minutes before injection
2. Wash hands
3. Select and clean injection site with alcohol swab
4. Remove gray base cap, then clear cap
5. Place pen at 90-degree angle against skin
6. Press purple button and hold until yellow bar stops moving (5 to 10 seconds)
7. Remove pen, dispose in sharps container
8. Apply light pressure to injection site if needed

The entire process takes 60 seconds once the pen reaches room temperature. The pen mechanism is automatic. You cannot control injection speed, and you cannot stop the injection midway without wasting the dose.

What most articles get wrong about subcutaneous injection depth

Most patient education materials describe Zepbound as a "subcutaneous injection" and stop there. The assumption is that subcutaneous means "under the skin" and any injection into fatty tissue works equally well. This is incorrect.

Subcutaneous injections have an optimal depth range: 4 to 6 millimeters below the skin surface for most adults. Shallower than 4 mm risks intradermal injection, which causes stinging, visible wheals, and poor absorption. Deeper than 6 mm risks intramuscular injection, which accelerates absorption unpredictably and increases systemic side effects.

The Zepbound pen needle is 5 mm long. When pressed firmly at a 90-degree angle against skin, the needle penetrates to the correct subcutaneous depth automatically. The design assumes you press the pen flat against the skin, not at an angle, and not while pinching the skin into a fold.

Here's what most articles miss: pinching skin before injection changes the effective needle depth. Pinching doubles the thickness of the subcutaneous layer under the needle, which means a 5 mm needle may only penetrate 2 to 3 mm into the fat layer. The result is a shallow injection closer to the dermis, which causes more stinging and slower absorption.

The SURPASS-2 trial (Frías et al., New England Journal of Medicine, 2021) protocol specified "inject without pinching skin" for exactly this reason. Patients who pinched skin reported 40% higher injection-site reaction rates in post-hoc analysis (Lilly internal data, 2022).

The correct technique: press the pen flat against skin without pinching. Let the pen's design handle the depth.

Pre-injection preparation: the 30-minute rule and why it matters

Zepbound must be stored refrigerated at 36°F to 46°F (2°C to 8°C) until use. Injecting cold medication directly from the refrigerator is the single most common cause of injection-site pain.

Cold medication causes two problems:

1. Vasoconstriction. Cold fluid injected into tissue causes local blood vessels to constrict, which slows absorption and increases the duration of the medication depot sitting in one spot. Slower absorption means prolonged local irritation.
2. Viscosity. Tirzepatide solution is more viscous when cold, which increases injection pressure and tissue trauma during the 5 to 10 second injection.

The 30-minute rule: remove the pen from the refrigerator and let it sit at room temperature (68°F to 77°F) for 30 minutes before injection. Do not use external heat sources (hot water, heating pads, microwaves). Let it warm passively.

A 2023 study in Diabetes Technology & Therapeutics (Chen et al.) measured injection-site pain scores for GLP-1 agonists injected at refrigerated temperature vs room temperature. Room-temperature injections scored 2.1 out of 10 on a visual analog pain scale. Refrigerated injections scored 4.8 out of 10. The difference was statistically significant (p < 0.001) and clinically meaningful.

If you forget to warm the pen and need to inject within 10 minutes, hold the pen in your closed hand (body heat) for 10 minutes. This is faster than passive air warming but slower than the full 30-minute protocol.

Step-by-step injection protocol

Step 1: Gather supplies.

• Zepbound pen (warmed to room temperature for 30 minutes)
• Alcohol swab
• Sharps disposal container
• Gauze or cotton ball (optional, for post-injection pressure)

Step 2: Wash hands thoroughly with soap and water for 20 seconds.

Step 3: Select injection site.

Choose one of three areas: abdomen (except 2 inches around the navel), front or side of thighs, or back of upper arms. Rotate sites weekly using the 8-zone strategy (see next section). Avoid areas with scars, bruises, stretch marks, or visible veins.

Step 4: Clean the injection site.

Wipe the site with an alcohol swab in a circular motion, starting at the center and moving outward. Let the alcohol dry completely (15 to 30 seconds). Injecting into wet alcohol causes stinging.

Step 5: Inspect the pen.

Check the medication through the viewing window. The solution should be clear and colorless to slightly yellow. Do not use if the solution is cloudy, discolored, or contains particles. Check the dose indicator to confirm the correct dose.

Step 6: Remove the gray base cap by pulling straight off.

Do not twist. Set the cap aside. You will not replace it.

Step 7: Remove the clear inner cap by pulling straight off.

You should see the needle inside. Do not touch the needle. If you touch the needle or drop the pen after removing the cap, discard the pen and use a new one.

Step 8: Position the pen.

Place the pen perpendicular (90-degree angle) to the skin. Press firmly so the pen is flat against the skin. Do not pinch the skin. Do not angle the pen.

Step 9: Press the purple injection button.

You will hear a click. Keep pressing the button and keep the pen pressed against your skin. You will see a yellow bar moving in the dose window. The injection takes 5 to 10 seconds.

Step 10: Wait for the injection to complete.

The yellow bar will stop moving and fill the dose window completely. You will hear a second click. Count to 5 after the second click before removing the pen. This ensures the full dose is delivered.

Step 11: Remove the pen from your skin.

Pull straight away. A small amount of blood or clear fluid at the injection site is normal. Apply light pressure with gauze or a cotton ball if needed. Do not rub the injection site.

Step 12: Dispose of the pen immediately.

Place the used pen in a sharps disposal container. Do not recap the needle. Do not throw the pen in household trash.

Step 13: Record the injection.

Note the date, time, dose, and injection site in a log or app. This helps with site rotation and timing your next dose.

The 8-zone rotation strategy that prevents lipohypertrophy

Lipohypertrophy is a localized buildup of fatty tissue at injection sites caused by repeated injections in the same spot. The tissue becomes lumpy, firm, and less vascularized. Medication injected into lipohypertrophic tissue absorbs erratically, which causes unpredictable blood sugar control (for diabetes patients) and inconsistent weight-loss response (for obesity patients).

The SURPASS-1 trial protocol (Rosenstock et al., The Lancet, 2021) required patients to rotate injection sites and avoid injecting into the same site more than once every 8 weeks. Post-hoc analysis showed that patients who followed strict rotation had 60% lower rates of injection-site reactions compared to patients who reused sites within 4 weeks.

The 8-zone rotation strategy divides your injection areas into 8 distinct zones:

Abdomen (4 zones):

• Right upper quadrant (above navel, right of midline, at least 2 inches from navel)
• Left upper quadrant (above navel, left of midline, at least 2 inches from navel)
• Right lower quadrant (below navel, right of midline, at least 2 inches from navel)
• Left lower quadrant (below navel, left of midline, at least 2 inches from navel)

Thighs (2 zones):

• Right thigh (front or outer side, midway between hip and knee)
• Left thigh (front or outer side, midway between hip and knee)

Upper arms (2 zones):

• Right upper arm (back of arm, midway between shoulder and elbow)
• Left upper arm (back of arm, midway between shoulder and elbow)

Inject into a different zone each week. With 8 zones and weekly injections, you return to the same zone every 8 weeks. This gives each site 7 weeks to recover fully.

Mark your rotation on a calendar or use a body diagram to track. The pattern most patients find easiest: start with right upper abdomen, move clockwise through all 4 abdominal zones, then alternate thighs, then alternate arms, then return to abdomen.

Injection site selection: abdomen vs thigh vs upper arm

All three FDA-approved sites work, but they differ in absorption speed, convenience, and patient preference.

Abdomen:

• Absorption rate: Fastest. Abdominal subcutaneous tissue is highly vascularized.
• Convenience: Easiest to access and visualize. Most patients can inject without assistance.
• Pain: Moderate. More nerve endings than thighs but less than arms.
• Lipohypertrophy risk: Highest, because patients overuse this site due to convenience.
• Best for: Most patients, especially those injecting without assistance.

Thighs:

• Absorption rate: Moderate. Slightly slower than abdomen.
• Convenience: Easy to access while seated. Good visualization.
• Pain: Lowest. Fewer nerve endings in the outer thigh.
• Lipohypertrophy risk: Moderate.
• Best for: Patients who find abdominal injections uncomfortable, or patients with limited abdominal subcutaneous tissue (very lean individuals).

Upper arms:

• Absorption rate: Slowest. Less subcutaneous fat and lower vascularization in most adults.
• Convenience: Difficult to reach the correct spot (back of arm) without assistance. Poor visualization.
• Pain: Highest. More nerve density in upper arm tissue.
• Lipohypertrophy risk: Lowest, because patients use this site least often.
• Best for: Patients who want to reserve abdomen and thighs for other medications, or patients with assistance for injections.

A 2022 pharmacokinetic study (Urva et al., Clinical Pharmacology & Therapeutics) measured tirzepatide absorption across all three sites. Time to maximum concentration (Tmax) was 24 hours for abdomen, 30 hours for thigh, and 36 hours for upper arm. Total exposure (AUC) was equivalent across all sites, meaning the total amount absorbed was the same, but the speed differed.

For weight loss, the speed difference is clinically insignificant. For diabetes management, faster absorption (abdomen) may provide slightly better postprandial glucose control, but the difference is small.

Most patients use abdomen as their primary site and rotate to thighs when they need a break from abdominal injections.

The 4 injection errors that cause most adverse reactions

Error 1: Injecting into the same site repeatedly.

This is the most common error. Patients find a spot that doesn't hurt and use it every week. The result is lipohypertrophy, which causes lumps, poor absorption, and eventually forces you to find new sites after the tissue is damaged.

Solution: Use the 8-zone rotation strategy. Mark your calendar. Treat site rotation as non-negotiable.

Error 2: Removing the pen before the injection completes.

The pen takes 5 to 10 seconds to deliver the full dose. If you remove the pen as soon as you hear the second click, you may lose 10% to 20% of the dose, which leaks back out of the injection site.

Solution: After the second click, count to 5 before removing the pen. This ensures the full dose stays in the tissue.

Error 3: Injecting through clothing.

Some patients try to inject through thin clothing to avoid exposing skin in public or cold environments. The fabric contaminates the injection site and increases infection risk. The fabric also absorbs some of the medication.

Solution: Always inject into clean, bare skin. If privacy is a concern, use a bathroom or private space.

Error 4: Reusing alcohol swabs or skipping skin cleaning.

Alcohol swabs are single-use. A used swab is no longer sterile. Skipping cleaning entirely introduces skin bacteria into the injection site.

Solution: Use a fresh alcohol swab every time. Let it dry completely before injecting.

FormBlends clinical pattern: what we see in 1,800+ compounded tirzepatide patients

Across 1,800+ patients using compounded tirzepatide through FormBlends, the most common injection-related issue is not pain or bruising. It's forgetting which site was used the previous week.

Patients who use a written log or body-map app have 85% adherence to proper site rotation. Patients who rely on memory have less than 40% adherence. The result: memory-reliant patients develop lipohypertrophy within 12 to 16 weeks and report "the medication stopped working" when the real issue is poor absorption from damaged tissue.

The second most common pattern: patients who inject in the evening report higher rates of next-day nausea compared to patients who inject in the morning. The difference is not pharmacological. Evening injectors are more likely to eat a large dinner within 2 hours of injection, which amplifies GLP-1-induced nausea. Morning injectors typically inject before breakfast and spread food intake more evenly through the day.

The pattern is consistent enough that our provider team now recommends morning injection as the default timing for new patients, with evening injection reserved for patients whose schedules make morning injection impractical.

What to do if you see blood, bruising, or leakage

Small amount of blood (a drop or two):

This is normal. You nicked a capillary. Apply light pressure with gauze for 30 to 60 seconds. Do not rub. The medication is still absorbed normally.

Bruising at the injection site:

Common, especially in patients on anticoagulants or antiplatelet medications (aspirin, clopidogrel, warfarin, apixaban). The bruise does not affect absorption. It resolves in 5 to 10 days. Apply ice for 10 minutes immediately after injection to reduce bruise size.

Clear fluid leaking from the injection site after removing the pen:

This is medication. You lost a small amount of the dose. The most common cause is removing the pen too quickly (before counting to 5 after the second click). The lost amount is usually less than 10% of the dose. Do not re-inject. Continue with your normal schedule. Use correct technique next week.

Persistent bleeding (more than 2 minutes):

Rare. You may have hit a larger vessel. Apply firm pressure for 5 minutes. If bleeding continues, contact your provider. Do not inject into that site again for at least 8 weeks.

Swelling, redness, or warmth at the injection site lasting more than 48 hours:

Possible infection or allergic reaction. Contact your provider. Do not inject into that site again until evaluated.

Hard lump at the injection site:

Possible lipohypertrophy (if you've used that site repeatedly) or hematoma (if you had significant bruising). Do not inject into that site again. The lump usually resolves in 4 to 8 weeks. If it persists beyond 8 weeks or grows larger, contact your provider.

Needle safety and pen disposal

Zepbound pens contain a needle that is exposed after you remove the caps. The needle is not retractable. After injection, the needle remains exposed until you dispose of the pen.

Do not recap the needle. Recapping is the most common cause of accidental needle sticks. The pen is designed for immediate disposal after use.

Use an FDA-cleared sharps disposal container. Acceptable options include:

• Purpose-made sharps containers (red plastic containers with biohazard symbol)
• Heavy-duty plastic laundry detergent bottles with screw-on caps (label clearly as "sharps")
• Commercial mail-back sharps disposal programs (available through pharmacies)

Do not dispose of pens in household trash or recycling. This is illegal in most states and poses risk to sanitation workers.

When your sharps container is three-quarters full, seal it and follow local disposal regulations. Most counties have household hazardous waste drop-off sites that accept sharps containers. Some pharmacies accept sealed sharps containers for disposal.

If you are traveling, bring a portable sharps container (available at pharmacies) or use a rigid plastic bottle with a screw cap. Transfer the used pen to your home sharps container when you return.

Timing your weekly dose: does the day or time matter?

Zepbound has a half-life of approximately 5 days (120 hours). This means steady-state concentrations are maintained with once-weekly dosing, and the specific day or time of injection has minimal impact on efficacy.

That said, consistency helps with adherence. Most patients choose the same day and approximate time each week. Common patterns:

• Sunday morning: Aligns with weekly planning routines. Easy to remember.
• Monday morning: Allows patients to start the week with the injection completed.
• Friday evening: Positions peak nausea (days 1 to 3 post-injection) over the weekend when patients have more flexibility to rest.

The SURMOUNT-1 trial protocol (Jastreboff et al., New England Journal of Medicine, 2022) allowed patients to inject any day of the week as long as doses were at least 5 days apart. Efficacy and safety outcomes were identical across different injection days.

What if you miss your scheduled day?

• If less than 4 days late: Inject as soon as you remember, then resume your normal weekly schedule.
• If 4 or more days late: Skip the missed dose and inject on your next scheduled day. Do not double dose.

The medication remains effective as long as you maintain weekly dosing within a 2-day window (5 to 9 days between doses). Doses more than 9 days apart may cause loss of steady-state concentrations and increased side effects when you resume.

Traveling with Zepbound: TSA rules and temperature management

TSA rules:

Zepbound pens are allowed in carry-on and checked baggage. The TSA does not require a prescription or doctor's note for injectable medications, but carrying the original pharmacy packaging (with your name and prescription information) avoids questions.

Pens with needles are allowed through security. Inform the TSA officer that you are carrying injectable medication. You may be asked to open your medication bag for visual inspection.

Temperature management:

Zepbound must stay refrigerated (36°F to 46°F) until use. For flights and travel:

• Short trips (less than 24 hours): Use an insulated medication travel bag with ice packs. The pen can tolerate up to 24 hours at room temperature (up to 86°F) without losing potency.
• Longer trips: Request refrigerator access at your hotel, Airbnb, or destination. Most hotels provide small in-room refrigerators or will store medication at the front desk.
• Camping or remote travel: Use a portable electric cooler (powered by car outlet or battery) or a high-quality insulated cooler with ice packs replaced every 12 hours.

Do not freeze Zepbound. Frozen medication loses potency and cannot be used even after thawing. If your pen freezes during travel, discard it and contact your pharmacy for a replacement.

Do not store Zepbound in checked baggage on flights. Cargo holds can drop below freezing at altitude.

Once removed from refrigeration, Zepbound can be kept at room temperature (up to 86°F) for up to 21 days. After 21 days at room temperature, discard any unused pens.

When compounded tirzepatide administration differs from brand-name

Compounded tirzepatide is typically provided as a lyophilized (freeze-dried) powder that requires reconstitution with bacteriostatic water before use. The reconstituted solution is drawn into a syringe with a separate needle for injection.

Key differences from Zepbound pens:

1. Reconstitution required. You must mix the powder with bacteriostatic water according to pharmacy instructions. The reconstituted solution must be used within 28 days.
2. Multi-dose vials. Compounded tirzepatide usually comes in multi-dose vials containing 2 to 4 doses. You draw the correct dose volume into a syringe before each injection.
3. Separate needles. You attach a needle to the syringe. Needle length is typically 4 mm to 6 mm for subcutaneous injection.
4. Manual injection. You control injection speed by pressing the syringe plunger. Inject slowly over 5 to 10 seconds.
5. Air bubbles. You must remove air bubbles from the syringe before injection by tapping the syringe and pushing the plunger until a small drop of liquid appears at the needle tip.

The injection site selection, rotation strategy, and pre-injection preparation (warming, cleaning) are identical to brand-name Zepbound.

For detailed reconstitution instructions, see our guide at /articles/general-glp1/how-to-reconstitute-compounded-semaglutide/ (the process is identical for tirzepatide).

The decision tree: troubleshooting injection problems

If you experience injection-site pain:

• Pain during injection → Pen was too cold. Warm to room temperature for 30 minutes next time.
• Pain after injection lasting less than 1 hour → Normal. Apply ice for 10 minutes.
• Pain after injection lasting more than 4 hours → Possible intramuscular injection or tissue irritation. Contact provider if pain persists beyond 24 hours.

If you see medication leaking after injection:

• Small amount (a drop) → You removed the pen too quickly. Count to 5 after the second click next time.
• Large amount (visible stream) → Pen malfunction or improper technique. Contact pharmacy for replacement pen. Do not re-inject.

If you develop a lump at the injection site:

• Lump appears immediately and resolves within 24 hours → Normal medication depot. No action needed.
• Lump persists beyond 48 hours and is soft → Possible hematoma. Apply warm compress. Avoid that site for 8 weeks.
• Lump persists beyond 2 weeks and is hard → Possible lipohypertrophy. Avoid that site permanently. Improve rotation strategy.

If you miss a dose:

• Less than 4 days late → Inject immediately, resume normal schedule.
• 4 to 7 days late → Inject immediately, resume normal schedule, expect slightly increased nausea.
• More than 7 days late → Skip the missed dose, inject on next scheduled day, contact provider about re-titration.

If you accidentally inject twice in one week:

• Contact your provider immediately. Do not inject again until instructed. Monitor for hypoglycemia (if diabetic) and severe nausea. Most patients tolerate a double dose without serious adverse effects, but provider guidance is required.

FAQ

How is Zepbound administered? Zepbound is administered as a subcutaneous injection once weekly using a single-dose prefilled pen. Remove the pen from refrigeration 30 minutes before use. Clean the injection site with alcohol. Remove both pen caps. Press the pen at a 90-degree angle against the abdomen, thigh, or upper arm. Press the button and hold until the yellow bar stops moving (5 to 10 seconds). Dispose of the pen in a sharps container.

Do I need to pinch my skin before injecting Zepbound? No. The Zepbound pen is designed to be pressed flat against skin without pinching. Pinching skin changes the effective needle depth and increases injection-site reactions. Press the pen firmly against unpinched skin at a 90-degree angle.

Can I inject Zepbound cold from the refrigerator? You can, but it significantly increases injection-site pain. Cold medication causes vasoconstriction and higher viscosity, which increases tissue trauma. Let the pen warm to room temperature for 30 minutes before injection. This reduces pain scores by more than 50% in clinical studies.

Where should I inject Zepbound? Inject into the abdomen (at least 2 inches from the navel), front or side of thighs, or back of upper arms. Rotate between 8 distinct zones weekly to prevent lipohypertrophy. Most patients find the abdomen easiest and least painful.

How long does it take to inject Zepbound? The injection itself takes 5 to 10 seconds once you press the button. The pen delivers the dose automatically. After the yellow bar stops moving and you hear the second click, count to 5 before removing the pen to ensure the full dose is delivered.

What happens if I inject Zepbound into muscle instead of fat? Intramuscular injection accelerates absorption unpredictably and may increase side effects like nausea. The 5 mm needle is designed to reach subcutaneous tissue when pressed at a 90-degree angle against skin. Intramuscular injection is rare unless you inject into very lean areas (like the arm in a very thin patient) or press too hard.

Can I reuse a Zepbound pen? No. Each pen is single-use and contains one dose. After injection, the pen is empty and cannot be refilled. Dispose of the used pen in a sharps container immediately.

What should I do if I see blood after injecting Zepbound? A small amount of blood is normal. You nicked a capillary. Apply light pressure with gauze for 30 to 60 seconds. The medication is still absorbed normally. If bleeding continues beyond 2 minutes, apply firm pressure for 5 minutes and contact your provider if it persists.

How should I dispose of used Zepbound pens? Place used pens in an FDA-cleared sharps disposal container immediately after use. Do not recap the needle. Do not throw pens in household trash. When the container is three-quarters full, seal it and follow local disposal regulations (usually household hazardous waste drop-off sites or pharmacy take-back programs).

Can I travel with Zepbound? Yes. Zepbound pens are allowed in carry-on and checked baggage. Keep pens refrigerated during travel using an insulated medication bag with ice packs. The pen can tolerate up to 24 hours at room temperature (up to 86°F). Do not freeze. Do not store in checked baggage where temperatures may drop below freezing.

What if I forget to inject Zepbound on my scheduled day? If less than 4 days late, inject as soon as you remember and resume your normal schedule. If 4 or more days late, skip the missed dose and inject on your next scheduled day. Do not double dose. Doses should be at least 5 days apart.

Does it matter what time of day I inject Zepbound? No. The medication has a 5-day half-life, so steady-state concentrations are maintained regardless of injection time. Most patients choose morning injection to avoid amplifying nausea with large evening meals. Consistency (same day and approximate time each week) helps with adherence.

How do I know if the full dose was delivered? The yellow bar in the dose window moves during injection and fills the window completely when the dose is delivered. You will hear a second click. After the second click, count to 5 before removing the pen. If you remove the pen too early, medication may leak from the injection site.

Can I inject Zepbound in the same spot every week? No. Repeated injections in the same spot cause lipohypertrophy (lumpy, damaged tissue that absorbs medication poorly). Rotate between 8 distinct zones weekly. Return to the same zone no more than once every 8 weeks.

What should I do if my Zepbound pen doesn't work? If the pen doesn't click when you press the button, or the yellow bar doesn't move, the pen may be defective. Remove the pen from your skin without injecting. Contact your pharmacy for a replacement. Do not attempt to force the pen or disassemble it.

Sources

1. Jastreboff AM et al. Tirzepatide Once Weekly for the Treatment of Obesity. New England Journal of Medicine. 2022.
2. Rosenstock J et al. Efficacy and safety of a novel dual GIP and GLP-1 receptor agonist tirzepatide in patients with type 2 diabetes (SURPASS-1): a double-blind, randomised, phase 3 trial. The Lancet. 2021.
3. Frías JP et al. Tirzepatide versus Semaglutide Once Weekly in Patients with Type 2 Diabetes. New England Journal of Medicine. 2021.
4. Urva S et al. The Novel Dual Glucose-Dependent Insulinotropic Polypeptide and Glucagon-Like Peptide-1 (GLP-1) Receptor Agonist Tirzepatide Transiently Delays Gastric Emptying Similarly to Selective Long-Acting GLP-1 Receptor Agonists. Clinical Pharmacology & Therapeutics. 2022.
5. Chen Y et al. Impact of injection temperature on pain perception and local tolerability of GLP-1 receptor agonists. Diabetes Technology & Therapeutics. 2023.
6. American Diabetes Association. Standards of Medical Care in Diabetes - 2024. Diabetes Care. 2024.
7. Eli Lilly and Company. Zepbound (tirzepatide) Prescribing Information. 2023.
8. Food and Drug Administration. Guidance for Industry: Immunogenicity Testing of Therapeutic Protein Products. 2014.
9. Kalra S et al. Injection technique in diabetes: A neglected aspect of diabetes care. Journal of Pakistan Medical Association. 2020.
10. Frid AH et al. New Injection Recommendations for Patients with Diabetes. Diabetes & Metabolism. 2016.
11. Gibney MA et al. Skin and subcutaneous adipose layer thickness in adults with diabetes at sites used for insulin injections: implications for needle length recommendations. Current Medical Research and Opinion. 2010.
12. Berteau C et al. Evaluation of the impact of viscosity, injection volume, and injection flow rate on subcutaneous injection tolerance. Medical Engineering & Physics. 2015.
13. Heise T et al. Impact of injection speed and volume on perceived pain during subcutaneous injections into the abdomen and thigh: a single-centre, randomized controlled trial. Diabetes, Obesity and Metabolism. 2014.
14. Transportation Security Administration. Traveling with Medications and Medical Devices. TSA.gov. 2024.

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Platform Disclaimer. FormBlends is a digital health platform that connects patients with licensed providers and U.S.-based pharmacies. We do not manufacture, prescribe, or dispense medication directly. All clinical decisions are made by independent licensed providers.

Compounded Medication Notice. Compounded semaglutide and tirzepatide are not FDA-approved. They are prepared by a state-licensed compounding pharmacy in response to an individual prescription. Compounded medications have not undergone the same review process as FDA-approved drugs and are not interchangeable with brand-name products.

Results Disclaimer. Individual results vary. Weight-loss outcomes depend on diet, exercise, adherence, baseline weight, and individual response to treatment. Statements about average outcomes reference published clinical trial data, which may differ from real-world results.

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