What is Fasenra Pen: Uses, Warnings & Interactions

Updated May 14, 2025  •  Published Dec 31, 2020

Fasenra Pen overview

BRAND NAMES:

  • Fasenra, Fasenra Pen

Generic Names:

  • Fasenra Pen

Uses:

  • Treats severe asthma.

Therapeutic Classes:

  • Anti-Inflammatory, Antiasthma

Forms:

  • Injectable

How it’s taken:

  • By injection

What is Fasenra Pen used for?

What form(s) does Fasenra Pen come in

  • Injectable

What are common Fasenra Pen doses?

  • Pen 1ML of 30MG/ML

How to take Fasenra Pen

  • Injection routeA nurse or other health provider will give you this medicine.

  • Missed dose: Injection routeCall your doctor or pharmacist for instructions.

  • Injection routeYour doctor will prescribe your exact dose and tell you how often it should be given. This medicine is given as a shot under your skin. It is usually injected in the upper arm, stomach, or thigh.

  • Read and follow the patient instructions that come with this medicine. Talk to your doctor or pharmacist if you have any questions.

  • Injection routeYour doctor will prescribe your exact dose and tell you how often it should be given. This medicine is given as a shot under your skin. It is usually injected in the upper arm, stomach, or thigh.

  • Missed dose: Injection routeCall your doctor or pharmacist for instructions.

  • Read and follow the patient instructions that come with this medicine. Talk to your doctor or pharmacist if you have any questions.

  • Injection routeA nurse or other health provider will give you this medicine.

What to do if you miss a dose of Fasenra Pen

Fasenra Pen contraindications

  • This medicine is not right for everyone. Do not use it if you had an allergic reaction to benralizumab.

Fasenra Pen warnings

  • This medicine will not stop an asthma attack that has already started. Your doctor may prescribe another medicine for you to use in case of an asthma attack.

  • If you use a corticosteroid medicine (inhaled or taken by mouth) to control your asthma, keep using it unless your doctor tells you otherwise.

  • Your doctor will check your progress and the effects of this medicine at regular visits. Keep all appointments.

  • Tell your doctor if you are pregnant or breastfeeding, or if you have a parasite or worm infection.

  • Keep all medicine out of the reach of children. Never share your medicine with anyone.

Fasenra Pen interactions

Fasenra Pen side effects

Serious Side Effects

  • Allergic reaction: Itching or hives, swelling in your face or hands, swelling or tingling in your mouth or throat, chest tightness, trouble breathing

  • Worsening of breathing problems

Less Serious Side Effects

  • Pain, itching, burning, swelling, or a lump under your skin where the shot was given

  • Sore throat

  • Headache

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