July 1, 2022

Side Effects, Uses, Dosage and More

Find answers to some frequently asked questions about Fasenra.

How does Fasenra work (what is its mechanism of action)?

How a drug works is called its “mechanism of action”.

Fasenra is used to treat severe eosinophilic asthma in adults and some children. (For more information, see the “What is Fasenra injection used for?” section above.)

Fasenra works by binding to certain white blood cells called eosinophils. When Fasenra binds to eosinophils, it sends signals to other cells in your body to destroy eosinophils. This lowers the level of eosinophils in your body, relieving the symptoms of eosinophilic asthma.

Can Fasenra be used to treat nasal polyps?

Fasenra is not currently approved by the Food and Drug Administration (FDA) for the treatment of nasal polyps. But one study found Fasenra effective in treating nasal polyps when used with corticosteroid nasal sprays.

The FDA is currently decides whether to approve Fasenra for the treatment of nasal polyps.

If you want to learn more about treatments for nasal polyps, talk to your doctor.

What should I know about the alternative drug Fasenra Dupixent?

Fasenra and Dupixent (dupilumab) are both biologic drugs prescribed to treat severe eosinophilic asthma in adults and some children. (Biologics are drugs made from living cells rather than chemicals.)

Both are given by injection under the skin.

But these drugs also have some differences. For example, Dupixent is also prescribed to treat certain conditions other than eosinophilic asthma.

To learn more about the similarities and differences between Fasenra and Dupixent, talk to your doctor or pharmacist. They can also discuss with you the best treatment for your condition.

Does Fasenra cause any long term side effects?

No, Fasenra is not known to cause any long term side effects. Long-term side effects have not been reported in studies drug.

Long-term side effects are side effects that:

  • begin after taking medication for a long time or after completing treatment, or
  • start during treatment and continue for a long time, possibly after treatment has finished

Your doctor or pharmacist can answer any questions you have about Fasenra and long-term side effects.

Is Fasenra used for COPD?

No, Fasenra is not used to treat chronic obstructive pulmonary disease (COPD).

A study did not find that the drug reduced the risk of COPD flare-ups. But another similar study is still collecting data to find out if Fasenra could be an effective treatment for COPD.

If you want to learn more about COPD treatments, check out this article or talk to your doctor or pharmacist.


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