How to use dupixent pen?

How to prepare the Dupixent pen

Wash your hands and take the pen out of the refrigerator for 30–45 minutes so it reaches room temperature. Do not warm it in a microwave or hot water. Check the liquid in the viewing window: it should look clear and colorless to pale yellow. Do not use the pen if the liquid is cloudy, discolored, or contains particles.

How to choose and clean the injection site

Pick a site on the thigh or abdomen (at least 2 inches from the navel) or the upper arm if someone else is giving the injection. Rotate sites each time. Clean the skin with an alcohol swab and let it dry.

How to give the injection

Hold the pen so you can see the window. Pull off the needle cap. Place the yellow needle cover flat against the skin at a 90-degree angle. Press the pen firmly and hold until the first “click” sounds, then keep holding for an additional 5 seconds until the second click. Check the window; the medicine is delivered when the window turns yellow. Remove the pen straight up and press a cotton ball or gauze over the site for a few seconds. Do not rub.

What to do after the injection

Place the used pen in a sharps container. Record the date and site of injection. Store unopened pens in the refrigerator; once removed, they may be kept at room temperature (up to 77 °F) for a maximum of 14 days. Do not put them back in the refrigerator after that time.

How long does the pen take to work

Some people notice improvement in itching or rash within 2 weeks, but full effect on asthma or nasal polyps can take 4–16 weeks. Continue using the medication on schedule even if symptoms improve early.

Can you travel with the Dupixent pen

Yes. Carry the pen in its original carton in a cool bag with an ice pack that does not touch the pen directly. If traveling for more than 14 days, plan for refrigeration at your destination.

What happens if you miss a dose

Inject the missed dose as soon as you remember, then resume your regular schedule. If it has been more than 7 days since the scheduled dose, contact your prescriber for guidance.

Why is Dupixent supplied in both a prefilled syringe and a pen

The pen is designed for patients who prefer an auto-injector and do not want to see the needle. The syringe option is available for those who need a lower dose or who are comfortable with manual injection. Both deliver the same medication.

When does the Dupixent patent expire

The primary U.S. composition-of-matter patent expires in 2027, with additional patents on the pen device extending coverage into the early 2030s. Biosimilar versions are not expected before the composition patent ends.

Who makes Dupixent and how much does it cost

Sanofi and Regeneron jointly market Dupixent. Without insurance or assistance programs, a single pen can exceed $3,500. Most patients use copay cards or patient-assistance programs that lower out-of-pocket cost to $0–$100 per month. Current pricing and savings options are listed on DrugPatentWatch.com.