Zynyz

— THERAPEUTIC CATEGORIES —
  • Melanoma and other skin cancers

Zynyz Generic Name & Formulations

General Description

Retifanlimab-dlwr 25mg/mL; soln for IV infusion after dilution.

Pharmacological Class

Programmed death receptor-1 (PD-1) blocking antibody.

How Supplied

Single-dose vial (20mL)—1

Storage

Store refrigerated at 2°C to 8°C (36°F to 46°F) in the original carton to protect from light. Do not freeze or shake.

Manufacturer

Generic Availability

NO

Mechanism of Action

Binding of the PD-1 ligands, PD-L1 and PD-L2, to the PD-1 receptor found on T cells, inhibits T-cell proliferation and cytokine production. Upregulation of PD-1 ligands occurs in some tumors, and signaling through this pathway can contribute to inhibition of active T-cell immune surveillance of tumors. Retifanlimab-dlwr binds to the PD-1 receptor, blocks interaction with its ligands PD-L1 and PD-L2, and potentiates T-cell activity.

Zynyz Indications

Indications

Metastatic or recurrent locally advanced Merkel cell carcinoma (MCC). 

Zynyz Dosage and Administration

Adult

Give as IV infusion over 30mins. 500mg every 4 weeks until disease progression, unacceptable toxicity, or up to 24 months. Dosage modifications: see full labeling. 

Children

Not established.

Zynyz Contraindications

Not Applicable

Zynyz Boxed Warnings

Not Applicable

Zynyz Warnings/Precautions

Warnings/Precautions

Severe and fatal immune-mediated adverse reactions can develop. Monitor closely for immune-related pneumonitis, hepatitis, colitis, endocrinopathies (thyroid disorders, adrenal insufficiency, diabetes, hypophysitis/hypopituitarism), nephritis/renal dysfunction, dermatologic reactions, myocarditis, neurological toxicities, others. Withhold or permanently discontinue based on severity and type of adverse reaction; see full labeling for management guidelines. Obtain liver enzymes, creatinine and thyroid function at baseline and periodically during therapy. Monitor for infection, hyperglycemia, or other signs of diabetes. Evaluate for Vogt-Koyanagi-Harada-like syndrome if uveitis in combination with other immune-mediated reactions occur. Interrupt, slow the infusion rate, or permanently discontinue based on severity of infusion-related reactions. Consider premedication (antipyretic and/or antihistamine) if previous systemic reactions to therapeutic proteins. Monitor closely for allogeneic HSCT-related complications (eg, graft-versus-host-disease, hepatic veno-occlusive disease, steroid-requiring febrile syndrome) and intervene promptly. Embryo-fetal toxicity. Advise females of reproductive potential to use effective contraception during and for 4 months after the last dose. Pregnancy: exclude status prior to initiation. Nursing mothers: not recommended (during and for 4 months after the last dose).

Zynyz Pharmacokinetics

Distribution

Geometric mean volume of distribution at steady state: 6.0 L.

Elimination

Half-life: 19 days. 

Zynyz Interactions

Not Applicable

Zynyz Adverse Reactions

Adverse Reactions

Fatigue, musculoskeletal pain, pruritus, diarrhea, rash, pyrexia, nausea, lab abnormalities; arrhythmia, pneumonitis.

Zynyz Clinical Trials

Clinical Trials

The approval was based on data from the open-label, multiregional, single-arm phase 2 PODIUM-201 trial (ClinicalTrials.gov Identifier: NCT03599713), which included 65 patients with metastatic or recurrent locally advanced MCC who did not receive prior systemic therapy for their advanced disease. Patients received retifanlimab 500mg intravenously every 4 weeks until disease progression, unacceptable toxicity, or up to 24 months.

Findings showed an overall response rate (ORR) of 52% (95% CI, 40-65), with 12 patients achieving complete response and 22 patients achieving partial response. Among responders, 26 patients had a duration of response (DOR) lasting at least 6 months and 21 patients had a DOR lasting at least 12 months. The DOR ranged from 1.1 to 24.9+ months.

Zynyz Note

Not Applicable

Zynyz Patient Counseling

Cost Savings Program

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