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Bimekizumab-bkzx (Monograph)

Brand name: Bimzelx
Drug class: Immunomodulatory Agents

Medically reviewed by Drugs.com on Oct 10, 2024. Written by ASHP.

[Web]

Introduction

Recombinant humanized IgG1 monoclonal antibody that binds specifically to interleukin-17A (IL-17A) and interleukin-17F (IL-17F).

Uses for Bimekizumab-bkzx

Plaque Psoriasis

Management of moderate to severe plaque psoriasis in adults who are candidates for phototherapy or systemic therapy.

Place in therapy for bimekizumab-bkzx relative to other biologic agents remains unclear; however, experts state that bimekizumab-bkzx may be used as first-line therapy for moderate to severe psoriasis.

Bimekizumab-bkzx Dosage and Administration

General

Pretreatment Screening

Patient Monitoring

Administration

Sub-Q Administration

Administer via sub-Q injection. May be self-administered if clinician determines the patient and/or caregiver is competent to safely administer the drug after appropriate training.

Commercially available as a 160 mg/mL solution in single-use autoinjectors or prefilled syringes.

Each prefilled syringe or autoinjector contains 160 mg of bimekizumab-bkzx; 2 separate prefilled syringes or autoinjectors required to administer a full dose.

Once removed from refrigerator, allow autoinjectors or prefilled syringes to sit at room temperature in unopened carton for 30–45 minutes prior to sub-Q injection.

Administer each sub-Q injection at a different anatomic site (i.e., thighs, abdomen, or back of upper arm); avoid injections within 2 inches of the navel. Rotate injection sites. Administration in upper outer arm may only be performed by caregiver or healthcare professional. Do not administer into areas where skin is tender, bruised, red, hard, thick, scaly, or affected by psoriasis.

If dose is missed, administer as soon as possible and resume dosing at the regular scheduled time.

Dosage

Adults

Plaque Psoriasis
Sub-Q

320 mg (two 160-mg prefilled syringes or autoinjectors) at weeks 0, 4, 8, 12, and 16, then every 8 weeks thereafter.

Patients weighing ≥120 kg: May consider 320 mg every 4 weeks after week 16.

Special Populations

Hepatic Impairment

No specific dosage recommendations at this time.

Renal Impairment

No specific dosage recommendations at this time.

Geriatric Patients

No specific dosage recommendations at this time.

Cautions for Bimekizumab-bkzx

Contraindications

Warnings/Precautions

Suicidal Ideation and Behavior

Suicidal ideation and behavior, including a completed suicide, reported. Causal relationship not established.

Weigh risks and benefits of bimekizumab-bkzx in patients with a history of severe depression or suicidal ideation or behavior. Advise patients and caregivers to monitor for emergence or worsening of depression, suicidal ideation, or other mood changes; advise them to promptly seek medical attention if such changes occur. Refer patients with new or worsening symptoms of depression or suicidal ideation/behavior to a mental health professional, as appropriate. Reassess risks and benefits of continuing bimekizumab-bkzx therapy if such adverse effects occur.

Infections

Increased risk of infections. Increased rates of upper respiratory tract infections, Candida infections, tinea infections, gastroenteritis, and herpes simplex infections reported.

Do not start bimekizumab-bkzx in patients with any clinically important active infection until it is resolved or adequately treated.

Consider risks and benefits prior to prescribing in patients with a chronic infection or history of recurrent infections.

Advise patients to seek medical attention if signs or symptoms of clinically important infection occur. If patient develops such an infection or is not responding to standard therapy, closely monitor patient and discontinue bimekizumab-bkzx until infection resolves.

Tuberculosis

Evaluate patients for active or latent tuberculosis before initiating bimekizumab-bkzx. Do not administer to patients with active tuberculosis. When indicated, initiate an appropriate antimycobacterial regimen for treatment of latent tuberculosis infection before initiating bimekizumab-bkzx. Consider antimycobacterial therapy for patients with a history of latent or active tuberculosis in whom an adequate course of antimycobacterial treatment cannot be confirmed. Closely monitor patients for active tuberculosis during and after bimekizumab-bkzx treatment.

Liver Biochemical Abnormalities

Increases in serum liver enzymes reported, including elevations >3 times ULN. Elevations occurred 28–198 days after initiating treatment with bimekizumab-bkzx and resolved after discontinuation.

Monitor serum liver enzyme concentrations, alkaline phosphatase, and bilirubin at baseline, periodically during treatment with bimekizumab-bkzx, and according to routine patient management. Interrupt therapy if increases in liver enzymes occur and drug-induced liver injury is suspected. Discontinue permanently in patients with causally associated combined elevations of transaminases and bilirubin.

Avoid use of bimekizumab-bkzx in patients with acute liver disease or cirrhosis (increased risk of severe hepatic injury).

Inflammatory Bowel Disease

Cases of inflammatory bowel disease reported.

Do not use in patients with active inflammatory bowel disease.

Monitor for signs and symptoms of inflammatory bowel disease and discontinue treatment if new onset or worsening inflammatory bowel disease occurs.

Immunizations

Administer all age-appropriate vaccines recommended by current immunization guidelines prior to initiation of therapy.

Avoid live vaccines during therapy.

Immunogenicity

Formation of anti-bimekizumab antibodies, including neutralizing antibodies, reported. No clinically significant effects of such antibodies identified.

Specific Populations

Pregnancy

Insufficient data in pregnant women to determine a drug-associated risk of major birth defects, miscarriage, or other adverse maternal or fetal outcomes. Human IgG known to cross placenta; therefore, potential for fetal exposure exists. Reproductive and developmental toxicity studies in monkeys revealed no evidence of adverse developmental effects.

Bimekizumab-bkzx may interfere with immune responses to infections; consider risks and benefits prior to administering live vaccines to infants exposed to the drug in utero. Specific time frame to delay live virus immunizations in infants exposed in utero not established; minimum of 4 months after birth may be considered based on drug half-life.

Pregnancy registry at 1-877-311-8972.

Lactation

Not known whether distributed into human milk; effects on the breast-fed infant or on milk production unknown. Endogenous maternal IgG and monoclonal antibodies transferred in human milk; effects of local GI and limited systemic exposure unknown.

Consider developmental and health benefits of breastfeeding along with the mother's clinical need for the drug and any potential adverse effects on the breast-fed infant from the drug or from the underlying maternal condition.

Pediatric Use

Safety and efficacy not established.

Geriatric Use

No apparent differences in safety or efficacy between geriatric patients and younger adults with plaque psoriasis; however, insufficient experience in patients ≥65 years of age to determine whether they respond differently than younger adults.

Hepatic Impairment

No formal studies to date.

Renal Impairment

No formal studies to date.

Common Adverse Effects

Adverse effects (≥1%) include upper respiratory tract infections, oral candidiasis, headache, injection site reactions, tinea infections, gastroenteritis, herpes simplex infections, acne, folliculitis, other Candida infections, fatigue.

Drug Interactions

No formal drug interaction studies performed to date.

Drugs Metabolized by Hepatic Microsomal Enzymes

CYP substrates: Increased concentrations of cytokines (e.g., interleukin-17) during chronic inflammation may modulate formation of CYP isoenzymes. Treatment with bimekizumab-bkzx may modulate serum levels of some cytokines.

Upon initiation or discontinuance of bimekizumab-bkzx, consider monitoring therapeutic effect or drug concentration of CYP substrates and consider dosage adjustment of CYP substrates as necessary, especially for drugs with a narrow therapeutic index.

Vaccines

Avoid live vaccines.

Clinical effectiveness of inactivated vaccines in patients receiving bimekizumab-bkzx not established; in healthy individuals, antibody responses to inactivated seasonal influenza virus vaccine were similar regardless of bimekizumab-bkzx administration 2 weeks prior to vaccination.

Bimekizumab-bkzx Pharmacokinetics

Absorption

Bioavailability

70% following sub-Q administration.

Peak serum concentrations achieved within 3–4 days.

Dose-proportional pharmacokinetics over sub-Q dose range of 64–480 mg.

Special Populations

Mean serum concentration predicted to be at least 30% lower in adults weighing ≥120 kg.

Distribution

Extent

Not known whether distributed into human milk.

Elimination

Metabolism

Expected to occur via degradation into small peptides via catabolic pathways.

Half-life

23 days.

Special Populations

Age does not substantially alter pharmacokinetics.

Stability

Storage

Parenteral

Injection for Sub-Q Use

2–8ºC. Keep in original carton; protect from light. Do not freeze or shake.

If removed from refrigeration, may store at room temperature (not to exceed 25ºC) for up to 30 days. Once at room temperature, do not return to refrigeration. Discard if not used within a 30-day period.

Actions

Advice to Patients

Additional Information

The American Society of Health-System Pharmacists, Inc. represents that the information provided in the accompanying monograph was formulated with a reasonable standard of care, and in conformity with professional standards in the field. Readers are advised that decisions regarding use of drugs are complex medical decisions requiring the independent, informed decision of an appropriate health care professional, and that the information contained in the monograph is provided for informational purposes only. The manufacturer’s labeling should be consulted for more detailed information. The American Society of Health-System Pharmacists, Inc. does not endorse or recommend the use of any drug. The information contained in the monograph is not a substitute for medical care.

Preparations

Excipients in commercially available drug preparations may have clinically important effects in some individuals; consult specific product labeling for details.

Please refer to the ASHP Drug Shortages Resource Center for information on shortages of one or more of these preparations.

Bimekizumab-bkzx is obtained through specialty pharmacies. Contact manufacturer or consult the Bimzelx website ([Web]) for specific availability information.

Bimekizumab-bkzx

Routes

Dosage Forms

Strengths

Brand Names

Manufacturer

Parenteral

Injection, for subcutaneous use

160 mg/mL

Bimzelx (available as single-use prefilled syringes or autoinjectors)

UCB

AHFS DI Essentials™. © Copyright 2025, Selected Revisions October 10, 2024. American Society of Health-System Pharmacists, Inc., 4500 East-West Highway, Suite 900, Bethesda, Maryland 20814.

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