How to Inject Dupixent Prefilled Pens and Syringes

Table of Contents

Dupixent (dupilumab) is a prescription biologic used to treat several inflammatory conditions, including moderate-to-severe eczema (atopic dermatitis), asthma, and chronic rhinosinusitis with nasal polyps. It is administered under the skin (subcutaneously) as a single-dose prefilled pen or syringe.

Learning how to inject Dupixent correctly helps you receive the full dose, reduce discomfort, and minimize waste. This guide explains the two delivery options of Dupixent and offers practical tips for storage, injection, and disposal.

Key Takeaways

Dupixent is administered as a subcutaneous injection using a prefilled pen or syringe. Both come in 200 mg or 300 mg strengths.
The pen hides the needle and auto-injects the dose, while the syringe requires you to insert the needle manually.
Always inspect the device and check the expiration date before use.
Allow the medicine to reach room temperature (45 minutes for pens, 30 minutes for syringes) before injecting.
Choose a different injection site each time and avoid areas that are tender, bruised, or scarred. Clean the injection site with an alcohol wipe and let it dry completely.
For pens, press the device firmly until you hear two clicks and the window turns yellow, then count to five.
For syringes, pinch the skin, insert the needle at a 45-degree angle, push the plunger slowly, and then release to cover the needle.

Understanding Dupixent injection options

Dupixent comes as an auto-injection pen and a prefilled syringe. Both devices hold a single dose of medicine. However, the injection technique and appearance differ. Your healthcare provider can help you choose the best option for you or your child.

Pen vs. Syringe

Feature	Prefilled pen	Prefilled syringe
Needle visibility	Needle is hidden; the yellow needle cover retracts, and the device automatically injects the dose.	Needle is visible; you insert it into the skin and push the plunger manually.
Approved ages	Adults and children from 2 years of age can use the pen.	Adults and children from 6 months of age can use the syringe.
Injection sites	Thigh, abdomen (except 2 inches around the navel), or upper arm (by a caregiver).	Same injection sites as the pen.
Ease of use	Many people find the pen easier because it hides the needle, though some report more injection pain.	Requires a steady hand and manual pressure but may cause less injection pain.
Step differences	Press the pen against the skin until you hear two clicks; the window turns yellow when the dose is delivered.	Pinch the skin, insert the needle at a 45-degree angle, push the plunger slowly, then release to cover the needle.

Preparing for your Dupixent injection

Regardless of the device, you will need alcohol wipes, cotton balls or gauze, and a sharps disposal container.

Gather supplies and check the medicine

- Choose a clean, flat work area and gather your Dupixent pen or syringe, an alcohol wipe, a cotton ball or gauze, and a sharps disposal container.

- Examine the device. Do not use it if it has been dropped, damaged, or if the cap is missing. The window should be clear, and the liquid should be colorless to pale yellow. A small air bubble is normal.

- Check the expiration date. Do not use the device if the date has passed.

Bring the device to room temperature

- For a pen: Remove it from the refrigerator and let it sit on a flat surface for at least 45 minutes to warm to room temperature (below 77 °F/25 °C). Do not heat it in a microwave or hot water, and do not expose it to sunlight.

- For a syringe: Allow it to warm for at least 30 minutes. Never shake the syringe.

Wash your hands and choose an injection site

- Wash your hands with soap and water.

- Pick a site on your thigh, abdomen (avoiding the 2-inch area around the belly button) or, if a caregiver is injecting, the outer upper arm. Rotate sites each time to avoid bruising or scarring.

- Avoid skin that is tender, damaged, bruised, or scarred, and never inject through clothing.

- Clean the chosen area with an alcohol wipe and allow it to dry completely. Do not touch or blow on the site after cleaning.

How to inject Dupixent using the prefilled pen

The Dupixent pen has a hidden needle and delivers the medicine automatically when you press it against your skin. You can see the progress through a small window on the pen.

1. Remove the cap: When you are ready to inject, pull the green cap straight off. Do not twist the cap, and do not put it back on after removal. Avoid pressing or touching the yellow needle cover with your fingers.

2. Pinch the skin (if needed): For adults and children 12 years or older, pinching the skin is not required. For younger children, gently pinch the skin to create a firm surface.

3. Place and inject: Hold the pen so you can see the window. Place the yellow needle cover against the skin at a 90-degree angle. Press down firmly until you hear a click; this starts the injection.

4. Watch the window: Keep pressing. The window will fill with yellow as the dose is delivered. When the window is completely yellow and you hear a second click, continue pressing against the skin and count slowly to five.

5. Remove the pen: Lift the pen straight up. The yellow needle cover will extend to hide the needle. If you see medicine leaking or the window is not fully yellow, you might not have received a full dose; call your doctor and do not inject a second dose.

6. Aftercare: If there is slight bleeding, gently dab the site with a cotton ball or gauze. Do not rub.

7. Dispose of the pen: Place the used pen and cap into a sharps container immediately.

How to inject Dupixent using the prefilled syringe

The Dupixent syringe requires manual insertion and injection, but it features a needle shield that covers the needle after use.

1. Remove the needle cap: Hold the syringe body and pull the needle cap straight off when you are ready to inject. Do not put the cap back on or touch the needle.

2. Pinch and insert: Pinch a fold of skin at the chosen site. Insert the needle completely into the fold at about a 45-degree angle.

3. Inject the medicine: Relax the pinch and push the plunger rod slowly and steadily until it stops. You may feel some resistance; this is normal. Keep the plunger depressed until the syringe is empty.

4. Cover and remove: Lift your thumb off the plunger rod so the needle shield automatically covers the needle. Then remove the syringe from your skin.

5. Aftercare: If there is a drop of blood, lightly press a cotton ball or gauze on the site. Do not rub the skin.

6. Dispose of the syringe: Place the used syringe and needle cap into your sharps disposal container right away.

Safe disposal and clean-up after your Dupixent shot

Used needles and devices should never go in household trash or recycling. The US Food and Drug Administration recommends placing needles and pens in an FDA-cleared sharps container.

These containers are made of rigid plastic and have a line marking when they are nearly full. If a sharps container is not available, use a heavy-duty plastic household container, such as a detergent bottle with a tight-fitting, puncture-resistant lid.

When the container is three-quarters full, follow community guidelines for disposal.

Keep the sharps container out of reach of children. Do not dispose of used pens or needles loosely in the trash or recycling.

Storage and handling of Dupixent

- Store unused pens or syringes in the refrigerator between 36 °F and 46 °F (2 °C to 8 °C). Keep them in the original carton to protect them from light.

- Pens and syringes can stay at room temperature (up to 77 °F / 25 °C) for up to 14 days. Once they have warmed to room temperature, do not return them to the refrigerator.

- Do not freeze, heat, or shake the device. Avoid direct sunlight.

- Keep the medicine out of reach of children.

Potential injection-site reactions and other considerations

Injection-site reactions are among the most common side effects of Dupixent. Symptoms can include pain, swelling, itchy skin, or redness. These reactions are usually mild and tend to resolve within a few hours. If you experience persistent or bothersome reactions, speak with your doctor.

Other common side effects include:

- eye-related issues (pink eye, blepharitis, or dry eyes)
- joint pain
- rare eosinophilic conditions

If you notice eye redness, discharge, pain, or vision changes, contact your doctor immediately.

Before starting Dupixent, discuss your medical history with your doctor. Let them know if you have parasitic infections, plan to receive live vaccines, or have a history of eye problems. Dupixent should be administered only after you have received proper training from a healthcare professional.

Bottom line

Follow the step-by-step instructions above to ensure you receive the full dose of Dupixent safely and comfortably. Whether you use a prefilled pen or syringe, take time to prepare your workspace, warm the medicine, and clean the injection site.

Proper handling, rotation of injection sites, and safe disposal protect you and those around you. Always consult your healthcare provider before starting injections and reach out to them with any questions or concerns.

Frequently Asked Questions

How do you give a Dupixent injection?

Dupixent is injected under the skin using either a prefilled pen or a prefilled syringe. Let the device warm to room temperature, wash your hands, clean the injection site with an alcohol wipe, then inject exactly as your healthcare provider showed you. Afterward, place the used pen or syringe in a sharps container.

Where is the best place to inject Dupixent?

The recommended injection areas are the thigh or the stomach area, except for the 2 inches around the belly button. A caregiver may also inject Dupixent into the outer upper arm. Rotate the injection site each time and avoid skin that is tender, bruised, damaged, or scarred.

Should you pinch skin when injecting Dupixent?

For the prefilled syringe, pinch a fold of skin before inserting the needle. For the prefilled pen, pinching is not needed for adults and children 12 years and older, but it may be used for younger children as directed in the device instructions. Follow the training given by your healthcare provider.

Is there a wrong way to inject Dupixent?

Yes. Dupixent should not be injected into a vein, muscle, clothing, damaged skin, bruised skin, or scarred skin. You should also avoid using an expired, cloudy, discolored, damaged, or previously used device. If you think the injection went wrong or the full dose was not delivered, call your healthcare provider and do not take another dose unless they tell you to.

Why are Dupixent shots so painful?

Dupixent may cause injection-site reactions such as pain, swelling, itching, or redness. Pain can also feel worse if the medicine is still cold, the site is tense, the skin is irritated, or the pen injects faster than expected.

What happens if you don't inject Dupixent deep enough?

Dupixent is meant to go into the fatty layer under the skin, not just onto the skin surface and not into muscle. If the needle or device is not positioned correctly, some medicine may leak out, and you may not receive the full dose. Contact your healthcare provider for advice instead of repeating the injection on your own.

What happens if you inject a little air subcutaneously?

A small air bubble in a Dupixent prefilled syringe can be normal, and the instructions say not to remove it. With subcutaneous injections, a tiny amount of air is usually not treated like the dangerous air-in-a-vein scenario people worry about. Call your healthcare provider if you have severe pain, unusual swelling, or concern that the dose was not given correctly.