Vestronidasa alfa (vestronidase alfa)

Para qué se usa Vestronidasa alfa

Cita de la sección «Indications and Usage» (indicaciones y uso) de la etiqueta aprobada por la FDA. Se muestra en inglés, tal como la publica la FDA.

MEPSEVII is indicated in pediatric and adult patients for the treatment of Mucopolysaccharidosis VII (MPS VII, Sly syndrome). Limitations of Use The effect of MEPSEVII on the central nervous system manifestations of MPS VII has not been determined. …

— Etiqueta de la FDA: Mepsevii, Ultragenyx Pharmaceutical Inc., vigente desde el 18 de noviembre de 2025. Leer la etiqueta completa en DailyMed →

Etiqueta citada: la de la presentación más común (injection, intravenous), Mepsevii, Ultragenyx Pharmaceutical Inc.; abarca 1 producto del directorio NDC de la FDA. Las citas sobre efectos secundarios, interacciones, dosis y embarazo de abajo vienen de esta misma etiqueta.

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Advertencia en recuadro

La advertencia en recuadro («caja negra») es la advertencia más seria de la FDA en la etiqueta de un medicamento, para riesgos graves o mortales.

Esta etiqueta tiene una advertencia en recuadro. Su título: WARNING: ANAPHYLAXIS. Leerla en la etiqueta completa →

Vestronidasa alfa: lo que dice la advertencia en recuadro

Cita de la advertencia en recuadro (Boxed Warning) de la etiqueta aprobada por la FDA. Se muestra en inglés.

WARNING: ANAPHYLAXIS Anaphylaxis has occurred with MEPSEVII administration, as early as the first dose [see Warnings and Precautions (5.1)], therefore appropriate medical support should be readily available when MEPSEVII is administered. Closely observe patients during and for 60 minutes after MEPSEVII infusion [see Dosage and Administration (2.2), Warnings and Precautions (5.1)].

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Immediately discontinue the MEPSEVII infusion if the patient experiences anaphylaxis [see Dosage and Administration (2.2), Warnings and Precautions (5.1)]. WARNING: ANAPHYLAXIS See full prescribing information for complete boxed warning. Anaphylaxis has occurred with MEPSEVII administration, as early as the first dose (5.1), therefore appropriate medical support should be readily available when MEPSEVII is administered. Closely observe patients during and for 60 minutes after MEPSEVII infusion (2.2, 5.1). Immediately discontinue the MEPSEVII infusion if the patient experiences anaphylaxis (2.2, 5.1).

— Etiqueta de la FDA: Mepsevii, Ultragenyx Pharmaceutical Inc., vigente desde el 18 de noviembre de 2025. Leer la etiqueta completa en DailyMed →

Efectos secundarios de Vestronidasa alfa

Cita de la sección «Adverse Reactions» (reacciones adversas) de la etiqueta aprobada por la FDA. Se muestra en inglés. Avise a su médico de cualquier efecto secundario que le preocupe.

The following serious adverse reactions are described below and elsewhere in the labeling: Anaphylaxis [see Warnings and Precautions (5.1)] Most common adverse reactions (≥1 patient) are: Infusion site extravasation, diarrhea, rash, anaphylaxis, infusion site swelling, peripheral swelling and pruritus.

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(6.1) To report SUSPECTED ADVERSE REACTIONS, contact Ultragenyx at 1-888-756-8657 or FDA at 1-800-FDA-1088 or www.fda.gov/medwatch. 6.1 Clinical Trials Experience Because clinical trials are conducted under widely varying conditions, adverse reaction rates observed in the clinical trials of a drug cannot be directly compared to rates in the clinical trials of another drug and may not reflect the rates observed in practice. The MEPSEVII clinical program included 23 patients aged 5 months to 25 years who received treatment with MEPSEVII at doses up to 4 mg/kg once every two weeks for up to 187 weeks. Nineteen patients were younger than 18 years of age. Table 2 summarizes the adverse reactions that occurred in Study 301, a randomized start trial in 12 patients with MPS VII between the ages of 8 and 25 years [see Clinical Studies (14)]. Adverse reactions in Table 2 occurred in one or more patients treated with MEPSEVII at a dosage of 4 mg/kg at a higher patient frequency than placebo. Adverse reaction incidence rates are presented in the table below to account for the different duration of exposure to active treatment vs. placebo. Table 2. Adverse Reactions in Patients with MPS VII in Study 301 Adverse Reaction MEPSEVII N =12 n (Incidence Rate*) Placebo N= 9 n (Incidence Rate*) Infusion site extravasation 4 (0.5) 1 (0.4) Diarrhea 3 (0.4) 0 (0.0) Rash 3 (0.4) 2 (0.7) Anaphylaxis 2 (0.2) 0 (0.0) Infusion site swelling 1 (0.1) 0 (0.0) Peripheral swelling 1 (0.1) 0 (0.0) Pruritus 1 (0.1) 0 (0.0) n = number of reactions *Adverse reaction incidence rates calculated per 8.3 patient years for exposure to MEPSEVII, and 2.7 years of exposure for placebo Febrile Convulsion One patient receiving a dose of 4 mg/kg experienced a febrile convulsion during MEPSEVII treatment at Week 66. The infusion was stopped, the patient received anticonvulsants, antipyretics and antibiotics, and the adverse reaction resolved. The patient subsequently was re-challenged without recurrence and continued on treatment. 6.2 Immunogenicity As with all therapeutic proteins, there is potential for immunogenicity. The detection of antibody formation is highly dependent on the sensitivity and specificity of the assay. Additionally, the observed incidence of antibody (including neutralizing antibody) positivity in an assay may be influenced by several factors including assay methodology, sample handling, timing of sample collection, concomitant medications, and underlying disease. For these reasons, comparison of the incidence of antibodies in the studies described below with the incidence of antibodies in other studies to other vestronidase alfa products may be misleading. Immunogenicity data were available from 23 patients who received MEPSEVII for up to 187 weeks of treatment.

— Etiqueta de la FDA: Mepsevii, Ultragenyx Pharmaceutical Inc., vigente desde el 18 de noviembre de 2025. Esto es solo una parte de la sección. Leer la etiqueta completa en DailyMed →

Dosis de Vestronidasa alfa

Cita de la sección «Dosage and Administration» (dosis y administración) de la etiqueta aprobada por la FDA. Se muestra en inglés. Su dosis es la que le receta su médico: no la cambie por su cuenta.

The recommended dosage is 4 mg/kg administered every two weeks as an intravenous infusion. (2.1) Premedication with a non-sedating antihistamine with or without an anti-pyretic is recommended 30 to 60 minutes prior to the start of the infusion. (2.2, 5.1) Administer the infusion over approximately 4 hours. In the first hour of infusion, infuse 2.5% of the total volume.

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After the first hour, the rate can be increased to infuse the remainder of the volume over 3 hours as tolerated. See Table 1 in the full prescribing information for the rate of infusion by dose and body weight. (2.4) For additional information on preparation, administration, and storage see the full prescribing information. (2.3, 2.4) 2.1 Recommended Dosage MEPSEVII should be administered under the supervision of a healthcare professional with the capability to manage anaphylaxis. Premedication is recommended 30 to 60 minutes prior to the start of the infusion [see Dosage and Administration (2.2)]. The recommended dosage of MEPSEVII is 4 mg/kg administered by intravenous infusion every two weeks. Administer the infusion over approximately 4 hours. Infuse the first 2.5% of the total volume over the first hour. After the first hour, increase the infusion rate as tolerated in order to complete infusion over the following 3 hours according to the recommended rate guidelines in Table 1 [see Dosage and Administration (2.4)]. 2.2 Premedication Administration of a non-sedating antihistamine with or without an anti-pyretic medication is recommended 30 to 60 minutes prior to the start of the infusion for patient comfort. Follow the instructions in Table 1 for the rate of MEPSEVII infusion [see Dosage and Administration (2.4)]. Observe patients closely during the infusion and following the infusion for a minimum of 60 minutes for the development of anaphylaxis [see Warnings and Precautions (5.1)]. Discontinue the infusion immediately if the patient experiences a severe systemic reaction, including anaphylaxis [see Warnings and Precautions (5.1)]. 2. 3 Preparation Instructions Prepare MEPSEVII according to the following steps using aseptic technique: 1. Determine the number of vials to be diluted based on the patient's actual weight and the recommended dose of 4 mg/kg, using the following calculations (a-b): a. Total dose (mg) = Patient's weight (kg) x 4 mg/kg (recommended dose) b. Total number of vials = Total dose (mg) divided by 10 mg/vial 2. Round to the next whole vial and remove the required number of vials from the refrigerator to allow them to reach room temperature. Do not heat, microwave or shake vials. a. Volume (mL) of calculated dose = Total dose (mg) divided by the 2 mg/mL concentration 3. The final solution will be a 1:1 dilution of MEPSEVII with 0.9% Sodium Chloride Injection, USP. More than 1:1 dilution may be used if the patient can tolerate additional infusion volume, taking into consideration cardiac function and fluid status. 4. For a 1:1 dilution, prepare the solution at room temperature, as follows: a. Select an empty infusion bag, sized upon the total volume of the final solution. b.

— Etiqueta de la FDA: Mepsevii, Ultragenyx Pharmaceutical Inc., vigente desde el 18 de noviembre de 2025. Esto es solo una parte de la sección. Leer la etiqueta completa en DailyMed →

Vestronidasa alfa en el embarazo

Cita de la parte sobre embarazo (Pregnancy) de la etiqueta aprobada por la FDA. Se muestra en inglés. Pregunte a su médico antes de tomar cualquier medicamento si está embarazada o planea estarlo.

Risk Summary There are no available data on MEPSEVII use in pregnant women to determine a drug-associated risk of adverse developmental outcomes. In embryofetal development studies, vestronidase alfa-vjbk administered intravenously to pregnant rats and rabbits during the period of organogenesis showed no adverse developmental outcomes at doses up to 1.6 and 10 times, respectively for rats and rabbits, the exposure at the recommended human dose.

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In a pre- and post-natal development study in rats, an increased number of stillbirths were observed at exposures less than the recommended human dose (see Data). The clinical relevance of these animal findings is uncertain. The estimated background risk of major birth defects and miscarriage for the indicated population is unknown. All pregnancies have a background risk of birth defect, loss, or other adverse outcomes. In the U.S. general population, the estimated background risk of major birth defects and miscarriage in clinically recognized pregnancies is 2 to 4% and 15 to 20%, respectively. Data Animal Data In embryofetal development studies, vestronidase alfa-vjbk administered intravenously to pregnant rats (once a week) and rabbits (once every 3 days) during the period of organogenesis showed no adverse developmental outcomes at doses up to 20 mg/kg. The 20 mg/kg dose in rats and rabbits provides approximately 1.6 and 10 times the human exposure (AUC) of 57.9 hr*mcg/mL at the 4 mg/kg dose administered once every other week, respectively. In a pre- and post-natal developmental study in rats, vestronidase alfa-vjbk was administered every 3 days from gestation day 7 through lactation day 20 at doses of 2 mg/kg, 6 mg/kg, and 20 mg/kg. Mortality and adverse clinical signs were observed in the maternal animals at the 20 mg/kg dose (1.6 times the human exposure (AUC) at the recommended human dose of 4 mg/kg). Subsequently, the 20 mg/kg dose was reduced to 12 mg/kg. Maternal toxicity with mortality in one animal was also observed at the 6 mg/kg dose (0.17 times the AUC at the recommended human dose of 4 mg/kg). At the 2 mg/kg dose (0.01 times the AUC at the recommended human dose of 4 mg/kg), no adverse effects were observed in the maternal animals; however, there was a statistically significant decrease in the number of live births and subsequent increase in the number of stillbirths at this dose.

— Etiqueta de la FDA: Mepsevii, Ultragenyx Pharmaceutical Inc., vigente desde el 18 de noviembre de 2025. Leer la etiqueta completa en DailyMed →

Presentaciones y vía de administración

Empresas que tienen este medicamento

Empresas en el directorio NDC de la FDA: la empresa que aparece en el envase (fabricante o distribuidor), con su número de productos con receta.

• Ultragenyx Pharmaceutical Inc.1 producto

Historial de aprobación de la FDA

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• Ultragenyx Pharmaceutical Inc.Fabricante o distribuidor
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Fuentes

1. Etiqueta aprobada por la FDA en DailyMed (Biblioteca Nacional de Medicina) — Mepsevii, Ultragenyx Pharmaceutical Inc., vigente desde el 18 de noviembre de 2025; vía openFDA, datos de la FDA exportados el 30 de octubre de 2026, consultados el 31 de octubre de 2026
2. NDC Directory (openFDA) — Administración de Alimentos y Medicamentos de los EE. UU. (FDA), datos de la FDA exportados el 30 de octubre de 2026, consultados el 31 de octubre de 2026
3. Drugs@FDA (openFDA) — Administración de Alimentos y Medicamentos de los EE. UU. (FDA), datos de la FDA exportados el 30 de octubre de 2026, consultados el 31 de octubre de 2026
4. Drug recall enforcement reports (openFDA) — Administración de Alimentos y Medicamentos de los EE. UU. (FDA), datos de la FDA exportados el 27 de octubre de 2026, consultados el 31 de octubre de 2026
5. Drug shortages (openFDA) — Administración de Alimentos y Medicamentos de los EE. UU. (FDA), datos de la FDA exportados el 30 de octubre de 2026, consultados el 31 de octubre de 2026
6. Nombre en español: RxNorm (Biblioteca Nacional de Medicina de EE. UU.) y Wikidata, vinculados por el identificador RxNorm (RxCUI) del principio activo, sin coincidencias aproximadas.

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