In a 52-week clinical trial in patients with CRSwNP (N=407)

Adverse reactions with NUCALA with ≥3% incidence and more common than placebo in patients with CRSwNP
Adverse Reaction NUCALA (n=206)
Placebo (n=201)
Oropharyngeal pain 8%
5%
Arthralgia 6%
2%
Abdominal Pain Upper 3%
2%
Diarrhea 3%
2%
Pyrexia 3%
2%
Nasal dryness 3%
<1%
Rash 3%
<1%
  • Systemic reactions, including hypersensitivity: <1% NUCALA, <1% placebo
    • Manifestations included urticaria, erythema, and rash. 1 of 3 reactions occurred on the day of dosing
  • Injection site reactions (eg, erythema, pruritus): 2% NUCALA, <1% placebo
  • Immunogenicity: In patients receiving NUCALA, 3% (n=6) developed anti-mepolizumab antibodies and none had neutralizing antibodies detected. The clinical relevance of anti-mepolizumab antibodies is not known
  • There were no serious adverse events of herpes zoster in patients receiving NUCALA