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is an interleukin-5 (IL-5) antagonist monoclonal antibody (IgG1 kappa) indicated for: • Add-on maintenance treatment of adult and pediatric patients aged 6 years and older with severe asthma and with an eosinophilic phenotype. ( 1.1 ) • Add-on maintenance treatment of adult patients aged 18 years and older with chronic rhinosinusitis with nasal polyps (CRSwNP). ( 1.2 ) • Add-on maintenance treatment of adult patients with inadequately controlled chronic obstructive pulmonary disease (COPD) and an eosinophilic phenotype. ( 1.3 ) • The treatment of adult patients with eosinophilic granulomatosis with polyangiitis (EGPA). ( 1.4 ) • The treatment of adult and pediatric patients aged 12 years and older with hypereosinophilic syndrome (HES) for greater than or equal to 6 months without an identifiable non-hematologic secondary cause. ( 1.5 ) Limitations of use: Not for relief of acute bronchospasm or status asthmaticus. ( 1.1 , 1.3 ) 1.1 Maintenance Treatment of Severe Asthma NUCALA is indicated for the add-on maintenance treatment of adult and pediatric patients aged 6 years and older with severe asthma and with an eosinophilic phenotype [see Use in Specific Populations ( 8.4 ), Clinical Studies ( 14.1 )] . Limitations of Use NUCALA is not indicated for the relief of acute bronchospasm or status asthmaticus [see Warnings and Precautions ( 5.2 )] . 1.2 Maintenance Treatment of Chronic Rhinosinusitis with Nasal Polyps NUCALA is indicated for the add-on maintenance treatment of …

is contraindicated in patients with a history of hypersensitivity to mepolizumab or excipients in the formulation [see Warnings and Precautions ( 5.1 ), Description ( 11 )] . History of hypersensitivity to mepolizumab or excipients in the formulation. ( 4 )

• Hypersensitivity reactions (e.g., anaphylaxis, angioedema, bronchospasm, hypotension, urticaria, rash) have occurred after administration of NUCALA. Discontinue NUCALA in the event of a hypersensitivity reaction. ( 5.1 ) • Herpes zoster infections have occurred in patients receiving NUCALA. Consider vaccination if medically appropriate. ( 5.3 ) • Do not discontinue systemic or inhaled corticosteroids abruptly upon initiation of therapy with NUCALA. Decrease corticosteroids gradually, if appropriate. ( 5.4 ) • Treat patients with pre-existing helminth infections before therapy with NUCALA. If patients become infected while receiving treatment with NUCALA and do not respond to anti-helminth treatment, discontinue NUCALA until parasitic infection resolves. ( 5.5 ) 5.1 Hypersensitivity Reactions Hypersensitivity reactions (e.g., anaphylaxis, angioedema, bronchospasm, hypotension, urticaria, rash) have occurred following administration of NUCALA. These reactions generally occur within hours of administration, but in some instances can have a delayed onset (i.e., days). In the event of a hypersensitivity reaction, NUCALA should be discontinued [see Contraindications ( 4 )] . 5.2 Acute Symptoms of Asthma or Chronic Obstructive Pulmonary Disease or Acute Deteriorating Disease NUCALA should not be used to treat acute symptoms or acute exacerbations of asthma or COPD. Do not use NUCALA to treat acute bronchospasm or status asthmaticus. Patients should seek medical advice if their …

8.1 Pregnancy Risk Summary The data on pregnancy exposure are insufficient to inform on drug-associated risk. Monoclonal antibodies, such as mepolizumab, are transported across the placenta in a linear fashion as pregnancy progresses; therefore, potential effects on a fetus are likely to be greater during the second and third trimester of pregnancy. In a prenatal and postnatal development study conducted in cynomolgus monkeys, there was no evidence of fetal harm with intravenous administration of mepolizumab throughout pregnancy at doses that produced exposures up to approximately 9 times the exposure at the maximum recommended human dose (MRHD) of 300 mg subcutaneous (see Data) . In the …