Fasenra vs Nucala

A side-by-side look at two respiratory medications advertised on TV. Informational only — not medical advice.

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Information reviewed July 24, 2026

US FasenraUS Nucala
Generic namebenralizumabmepolizumab
Drug classIL-5 Receptor Antagonist (Biologic)IL-5 Antagonist (Biologic)
TreatsSevere eosinophilic asthmaSevere eosinophilic asthma, COPD, nasal polyps
CategoryRespiratoryRespiratory
ManufacturerAstraZenecaGSK
Year approved20172015
FDA warningNo boxed warningNo boxed warning
Est. TV ad spend$80M$75M
Common side effectsHeadache, Sore throat, Allergic reactions, Injection site reactionsHeadache, Injection site reactions, Back pain, Fatigue

Frequently asked questions

Is Fasenra or Nucala better?

Neither is universally "better." Fasenra (benralizumab) and Nucala (mepolizumab) are both used for respiratory, but the right choice depends on your medical history, insurance and your doctor's guidance. This comparison is informational only.

What's the difference between Fasenra and Nucala?

Fasenra is a IL-5 Receptor Antagonist (Biologic) made by AstraZeneca, while Nucala is a IL-5 Antagonist (Biologic) made by GSK. See the table above for a side-by-side breakdown.

Which one spends more on TV ads?

Fasenra has the larger estimated TV advertising budget of the two.

TVPills

A reference tool to help identify prescription medications and supplements seen in television advertising. This is not medical advice. Always consult a healthcare professional.

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