Nucala (mepolizumab)

Product Name:

Nucala (mepolizumab)

Categories: Allergy, Pulmonology

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Table of Contents

Nucala

Product Category

Biologic Therapy / Severe Asthma and Eosinophilic Conditions

Brand Name

Nucala

Generic Name or Biosimilar

No

Active Ingredient

Mepolizumab

Prescription Status

Prescription-only

Targeted Conditions

Nucala is FDA-, Health Canada–, and COFEPRIS-approved for the treatment of:

  • Severe eosinophilic asthma in patients aged 6 years and older
  • Eosinophilic Granulomatosis with Polyangiitis (EGPA)
  • Hypereosinophilic Syndrome (HES)
  • Chronic Rhinosinusitis with Nasal Polyps (CRSwNP)

It is used as an add-on maintenance treatment and not a rescue medication.

Off-Label Usage

Though not officially approved, Nucala has been prescribed off-label for:

  • Eosinophilic esophagitis
  • Chronic spontaneous urticaria with elevated eosinophils
  • Other rare eosinophil-driven disorders in select cases

Use of Nucala in off-label settings must be supervised by a specialist in immunology or pulmonology.

Drug Classification Overview

Nucala (mepolizumab) is a humanized monoclonal antibody (IgG1 kappa) that targets interleukin-5 (IL-5), a key cytokine responsible for the growth and activation of eosinophils. By blocking IL-5, Nucala reduces the production and survival of eosinophils, which drive inflammation in various severe respiratory and autoimmune conditions.

It is administered via subcutaneous injection.

Manufacturer in the USA, Mexico, and Canada

USA: GlaxoSmithKline (GSK)
Mexico: GlaxoSmithKline Mexico S.A. de C.V.
Canada: GlaxoSmithKline Inc. (Canada)

Available Strengths and Dosage Forms – United States, Mexico, and Canada

Country Comparison – United States vs Mexico and Canada

  • Formulation: All countries offer subcutaneous injection (prefilled syringe or autoinjector)
  • Labeling: Packaging and language vary (English in US/Canada, Spanish in Mexico)
  • Manufacturing sites: May vary slightly across GSK facilities
  • Regulatory equivalence: All versions approved by respective health authorities

Average Retail Price (Monthly Treatment) USA vs Mexico vs Canada

Canada: ~35–50% savings vs. U.S. retail prices
Mexico: ~40–55% savings vs. U.S. retail prices
Savings may vary depending on inventory, prescription requirements, cold chain logistics, and market availability.

Where to Buy USA

Costco, CVS, Rite Aid, Walgreens, Walmart, Kroger, Albertsons, Sam’s Club, Publix, Target (via CVS Pharmacy), and online mail-order specialty care pharmacies.

Note: As a specialty medication, Nucala may require prior authorization and be available only via select specialty pharmacies.

Storage Requirements

  • Refrigerate between 36°F–46°F (2°C–8°C). Do not freeze.
  • Must be protected from light and used within the designated period after removal from refrigeration.
  • Cold chain shipping is required for this medication.

Shipping from Canada

This medication is accessed through fully licensed Canadian pharmacies regulated by Health Canada. All pharmacies included in the MedicalMex network undergo a rigorous review and verification process to ensure compliance with national standards, patient safety, and medication authenticity.

MedicalMex facilitates:

  • Prescription verification and fulfillment coordination
  • Secure, compliant medication logistics
  • Access to licensed Canadian pharmacists
  • Access to our network of certified physicians if a Telehealth consultation is needed
  • Case management, payment handling, and personalized boutique-level support
  • Cold chain shipping with next-generation temperature-monitored coolers, when required
  • Refill tracking and patient adherence programs

You are working directly with MedicalMex Inc., a U.S.-based company that helps eligible patients safely access affordable medications from Canada — with compliance and full-service concierge support at every step.

Buying from Mexico

This medication is also available through certified pharmacies in Mexico regulated by COFEPRIS (Mexico’s national health authority). All partners in the MedicalMex network must pass a rigorous review and certification process before being approved for patient access.

MedicalMex facilitates:

  • Transportation support to our affiliate clinic in Tijuana, Mexico
  • Prescription handling through licensed physicians within our certified network
  • Access to our network of accredited physicians if a Telehealth consultation is needed
  • Travel coordination, including flights and/or hotel reservations when required
  • Travel insurance
  • Cold chain shipping with advanced temperature-monitored coolers, when applicable
  • Personalized, boutique-level service
  • Refill tracking and patient adherence support

You are working directly with MedicalMex Inc., a U.S.-based company that manages every detail — from medical and travel logistics to prescription compliance — providing secure, affordable access to life-saving medications from Mexico.

Key Benefits

  • Targets eosinophilic inflammation at the source
  • Reduces asthma exacerbations and steroid dependence
  • FDA, Health Canada, and COFEPRIS approved for multiple eosinophilic conditions
  • Administered once monthly (home or clinic)
  • Improves quality of life and breathing capacity in severe asthma patients
  • Can reduce hospitalizations and ER visits over time

Side Effects

Common side effects:

  • Injection site reactions (pain, redness, swelling)
  • Headache
  • Back pain
  • Fatigue

Less common but serious side effects:

  • Hypersensitivity reactions, including anaphylaxis
  • Herpes zoster infections
  • Increased risk of parasitic infections in endemic areas
  • Immune system modulation in autoimmune comorbidities

Always report any unusual symptoms to your healthcare provider.

Warnings and Precautions

  • Not for acute asthma attacks
  • Monitor for allergic reactions post-injection
  • Use caution in patients with helminth infections
  • Discontinue if hypersensitivity occurs
  • Not a replacement for corticosteroids in acute settings

Nucala should only be used under close supervision by a specialist.

Alternative Medications (by Indication)

  • For severe eosinophilic asthma: Fasenra (benralizumab); Cinqair (reslizumab); Dupixent (dupilumab)
  • For EGPA or HES: High-dose corticosteroids; Immunosuppressants (e.g., methotrexate, azathioprine)
  • For Nasal Polyps: Dupixent; Nasal corticosteroid sprays; Surgery (in refractory cases)

Medication FAQs

Nucala treats eosinophil-driven diseases like severe asthma, EGPA, HES, and nasal polyps by lowering eosinophil counts in the body.

It is given via subcutaneous injection, typically once a month. It may be self-injected at home or administered in a clinic depending on the healthcare provider’s guidance.

No, Nucala is not a steroid. It is a biologic that targets interleukin-5 to control inflammation driven by eosinophils.

No. Nucala is a maintenance therapy. You should continue to carry and use your rescue inhaler (e.g., albuterol) for sudden symptoms.

No. As of 2025, there is no FDA- or Health Canada–approved generic version of mepolizumab.

Some patients notice improvement within a few weeks, but full benefits may take several months of consistent use.

Yes, but you must maintain proper refrigeration during travel. Special cold chain containers are recommended.

Contact your doctor. They may recommend taking the missed dose as soon as possible or adjusting your schedule.

MedicalMex provides access to Nucala at a lower cost through licensed providers in Canada and Mexico. We handle prescriptions, cold chain shipping, coordination, and personalized concierge support throughout your treatment journey.

Yes, a valid prescription from a licensed physician is required for all orders.

Absolutely. We work only with fully licensed pharmacies and suppliers approved by Health Canada or COFEPRIS.

Yes, but only under the supervision of your specialist. It is often combined with inhalers, corticosteroids, or antihistamines depending on your condition.

No. MedicalMex is a U.S.-based concierge service that facilitates access to medications through fully licensed and approved pharmacy partners.