Inebilizumab

FDA label, Horizon Therapeutics USA, Inc., intravenous, effective 2025-12-11. Full label on DailyMed

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Specialty pharmacy: therapy management checklist, storage and cold chain, dosing calendar, Medicare Part D coverage.

Quoted from the FDA label. Product labels differ by manufacturer and change over time; confirm against the label for the product you are using.

CD19-directed Cytolytic Antibody

Dosing in kidney impairment

This label has no separate kidney-impairment dosing section. Check warnings and clinical pharmacology in the full label.

Preparation and administration

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Assessment and Premedication Before Every Infusion Infection Assessment Prior to every infusion of UPLIZNA, determine whether there is an active infection. In case of active infection, delay infusion of UPLIZNA until the infection resolves [see Warnings and Precautions ]. Premedication Table 1 shows premedication to administer prior to each infusion of UPLIZNA to reduce the frequency and severity of infusion reactions [see Warnings and Precautions ]. [See table below.] antipyretic oral acetaminophen 500 mg to 650 mg 30 to 60 minutes

Recommended Dosage and Administration NMOSD, IgG4-RD, and gMG UPLIZNA is administered as an intravenous infusion (see Table 2 ). The recommended dosage is: Initial dose: 300 mg intravenous infusion followed 2 weeks later by a second 300 mg intravenous infusion. Subsequent doses (starting 6 months from the first infusion): single 300 mg intravenous infusion every 6 months.

Administration UPLIZNA must be diluted prior to administration [see Dosage and Administration ]. Prior to the start of the intravenous infusion, the prepared infusion solution should be at room temperature. Administer UPLIZNA under the close supervision of an experienced healthcare professional with access to appropriate medical support to manage potential severe reactions such as serious infusion reactions [see Warnings and Precautions ].

Administer the prepared solution intravenously via an infusion pump at an increasing rate to completion, approximately 90 minutes, according to the schedule in Table 2. Administer through an intravenous line containing a sterile, low-protein binding 0.2 or 0.22 micron in-line filter. [See table below.] Monitor the patient closely for infusion reactions during and for at least one hour after the completion of the infusion.

Preparation and Storage of Infusion Solution Preparation Visually inspect UPLIZNA solution for particulate matter and discoloration [see Dosage Forms and Strengths ]. If the solution is cloudy, discolored, or it contains discrete particulate matter, do not use and contact the manufacturer (1-800-772-6436). Do not shake the vial.

Obtain an intravenous bag containing 250 mL of 0.9% Sodium Chloride Injection, USP. Do not use other diluents to dilute UPLIZNA. Withdraw 10 mL of UPLIZNA from each of the 3 vials contained in the carton and transfer a total of 30 mL into the 250 mL intravenous bag. Mix diluted solution by gentle inversion. Do not shake the solution.

Discard the unused portion remaining in the vials. Storage of Infusion Solution UPLIZNA does not contain a preservative. Administer the prepared infusion solution immediately. If not administered immediately, store the infusion solution for a maximum of 24 hours in the refrigerator between 2°C to 8°C (36°F to 46°F) or 4 hours at room temperature between 20°C to 25°C (68°F to 77°F) prior to the start of the infusion.

Table 1. Premedication Prior to Each UPLIZNA Infusion
Type of PremedicationRoute of AdministrationExamples (or Equivalent)Administration Time Prior to UPLIZNA Infusion
corticosteroidintravenousmethylprednisolone 80 mg to 125 mg30 minutes
antihistamineoraldiphenhydramine 25 mg to 50 mg30 to 60 minutes
antipyreticoralacetaminophen 500 mg to 650 mg30 to 60 minutes
Table 2. Recommended Infusion Rate for UPLIZNA Administration When Diluted in a 250 mL Intravenous Bag
Elapsed Time (minutes)Infusion Rate (mL/hour)
0-3042
31-60125
61 to completion333

Drug interactions

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  • Inebilizumab
Label text (2 paragraphs)

7 DRUG INTERACTIONS

7.1 Immunosuppressive or Immune-Modulating Therapies Concomitant usage of UPLIZNA with immunosuppressant drugs, including systemic corticosteroids, may increase the risk of infection. Consider the risk of additive immune system effects when co-administering immunosuppressive therapies with UPLIZNA.

Contraindications

4 CONTRAINDICATIONS UPLIZNA is contraindicated in patients with: A history of a life-threatening infusion reaction to UPLIZNA [see Warnings and Precautions (5.1) ] Active hepatitis B infection [see Warnings and Precautions (5.2) ] Active or untreated latent tuberculosis [see Warnings and Precautions (5.2) ] Previous life-threatening reaction to infusion of UPLIZNA ( 4 ) Active hepatitis B infection ( 4 ) Active or untreated latent tuberculosis ( 4 )

Safety data

Reported adverse events (FAERS)

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Source: FDA Adverse Event Reporting System via openFDA

Liver injury (LiverTox)

E

Likelihood score E: Unlikely cause of clinically apparent liver injury.

Inebilizumab is a monoclonal antibody to CD19 that is used to treat adults with neuromyelitis optica spectrum disorder accompanied by an autoantibody to aquaporin-4. Inebilizumab therapy is associated with an increased risk of infections and possibly reactivation of hepatitis B and tuberculosis, but it has not been associated with serum aminotransferase elevations during therapy or to instances of clinically apparent liver injury.

ABCDEA: well known cause; E: unlikely cause. [HD]: high doses only.

Source: LiverTox: Inebilizumab (NIDDK, public domain)Chapter updated May 14, 2024

Pregnancy and lactation

Pregnancy

8.1 Pregnancy Pregnancy Exposure Registry There is a pregnancy exposure registry that monitors pregnancy outcomes in women exposed to UPLIZNA during pregnancy or shortly before conception. Healthcare providers are encouraged to advise their patients to register by contacting the UPLIZNA Pregnancy Registry by calling the coordinating center at 1 (303) 724-4644 or www.upliznapregnancyregistry.com. Risk Summary UPLIZNA is a humanized IgG1 monoclonal antibody and immunoglobulins are known to cross the placental barrier. There are no adequate data on the developmental risk associated with the use of UPLIZNA in pregnant women.

However, transient peripheral B-cell depletion and lymphocytopenia have been reported in infants born to mothers exposed to other B-cell depleting antibodies during pregnancy. B-cell levels in infants following maternal exposure to UPLIZNA have not been studied in clinical trials. The potential duration of B-cell depletion in such infants, and the impact of B-cell depletion on vaccine safety and effectiveness, is unknown [see Warnings and Precautions (5.2) ]. 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 Intravenous administration of inebilizumab-cdon (0, 3, or 30 mg/kg/week) to human CD19 transgenic (huCD19 Tg) male and female mice prior to and during mating and continuing in females through gestation day 15 resulted in no adverse effects on embryofetal development; however, there was a marked reduction in B-cells in fetal blood and liver at both doses tested. These results demonstrate that inebilizumab-cdon crosses the placenta and depletes B-cells in the fetus.

Intravenous administration of inebilizumab-cdon (0, 3, or 30 mg/kg) to huCD19 Tg mice every three days throughout organogenesis and lactation resulted in depletion of B-cells and persistent reductions in immune function (even following repletion of B-cells and lasting into adulthood) in offspring at both doses tested. At the end of the lactation period, plasma inebilizumab-cdon levels in offspring were only slightly lower than those in maternal plasma. A no-effect level for immunotoxicity in the offspring was not identified.

Breastfeeding (LactMed)

No information is available on the clinical use of inebilizumab during breastfeeding. Because inebilizumab is a large protein molecule with a molecular weight of about 149,000 Da, the amount in milk is likely to be very low. Absorption is unlikely because it is probably destroyed in the infant's gastrointestinal tract. Waiting for at least 2 weeks postpartum to resume therapy may minimize transfer to the infant.

Source: LactMed: Inebilizumab (NICHD, public domain)Revised Jul 15, 2026

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