Adstiladrin Drug Information

ADSTILADRIN ® is indicated for the treatment of adult patients with high-risk Bacillus Calmette-Guérin (BCG)-unresponsive non-Muscle Invasive Bladder Cancer (NMIBC) with carcinoma in situ (CIS) with or without papillary tumors.

Preparation and Handling ADSTILADRIN is a non-replicating adenoviral vector-based gene therapy. Follow universal biosafety precautions for handling. Individuals who are immunosuppressed or immune-deficient, should not prepare, administer, or come into contact with ADSTILADRIN.

ADSTILADRIN is provided as a sterile frozen suspension. All four vials of ADSTILADRIN must be thawed and brought to room temperature (20°C to 25°C ) prior to use. Do not expose the vials to higher temperatures (>25°C ).

Protect from light. DO NOT refreeze. ADSTILADRIN may be moved between refrigerator and room temperature if the total storage time at each condition is not exceeded (24 hours at room temperature and 7 days refrigerated including thawing time).

WHEN THAWING IN WATER BATH Frozen ADSTILADRIN vials will thaw in approximately 25 minutes outside the cardboard nest when placed directly in a water bath maintained at 25°C. Place the vials in the water bath, ensuring that the water level is sufficient to cover the product within the vials. Following thawing, remove vials from the water bath and dry with a clean paper towel to remove any residual moisture prior to further handling.

WHEN THAWING AT ROOM TEMPERATURE Frozen ADSTILADRIN vials will thaw in approximately 3 to 5 hours outside the cardboard nest when placed at room temperature (up to 25°C ) (8 to 10 hours inside the nest). WHEN THAWING IN REFRIGERATOR Frozen ADSTILADRIN vials will thaw in approximately 4 to 5 hours outside the cardboard nest when placed in the refrigerator (up to 8°C ) (11 to 13 hours inside the nest). Subsequent time for bringing thawed ADSTILADRIN to room temperature is approximately 2 hours 30 minutes outside of the cardboard nest (6 hours inside the nest).

Inspection and Preparing ADSTILADRIN for instillation Visually inspect all 4 vials for visible particles and discoloration. The suspension is clear to slightly opalescent and may contain opalescent flecks. Do not use if visible particles or discoloration are observed.

Mix gently. Do not shake. Items required for instillation: 70% isopropyl ethanol pads Four thawed vials of ADSTILADRIN Four vented vial adapters suitable for a standard 20 mL vial Two standard 50 or 60 mL polypropylene Luer lock syringes or one Luer lock syringe equal to or greater than 75 mL (max 100 mL) Two Luer lock adapters One straight, or intermittent, urethral catheter with a proximal funnel opening that will accommodate the Luer lock adapter.

Use only catheters made of vinyl/PVC (uncoated or coated with hydrogel), red rubber latex or silicone to instill ADSTILADRIN. Do not use catheters coated or embedded with silver or antibiotics. Using aseptic technique, remove the cap from an ADSTILADRIN vial.

Prior to vial access, wipe the access diaphragm with 70% isopropyl alcohol pad, allowing it to air dry before proceeding. Attach a vented vial adapter according to manufacturer’s instructions. Connect the syringe to the vial adapter and withdraw the contents of the vial into the syringe.

Repeat steps 1-2 for the remaining three vials until 75 mL has been withdrawn into one or two syringes. The volumes in the syringes do not have to be equal. Discard any remaining volume according to universal precautions.

If unable to administer the suspension shortly after withdrawal, the solution may be stored in syringes for up to 6 hours at room temperature (20°C to 25°C ) protected from light. Treat any ADSTILADRIN spills or unused portion with a virucidal agent (such as sodium hypochlorite with 0.5% active chlorine or 6% hydrogen peroxide solution) for 15 minutes. Disposable materials that have come into contact with ADSTILADRIN should be placed in biohazard containers for destruction.

Non-disposable equipment may be decontaminated according to the facility’s standard operating procedures. Mix gently. Do not shake.

Bladder instillation of ADSTILADRIN Premedication with an anticholinergic before each instillation of ADSTILADRIN is recommended. ADSTILADRIN must be brought to room temperature before administration. Before administering ADSTILADRIN to the patient, insert one straight, or intermittent, urinary catheter with a proximal funnel opening that will accommodate the Luer lock adapter.

Use the catheter to completely empty the patient's bladder before instillation of ADSTILADRIN. Do not remove the catheter. Attach the Luer lock end of the same catheter adapter to the syringe containing ADSTILADRIN and insert the tapered end of the catheter adapter into the funnel opening of the catheter.

Slowly instill 75 mL of ADSTILADRIN into the bladder through the catheter, ensuring that the complete volume is administered. After the instillation, ADSTILADRIN should be retained in the bladder for 1 hour. During the 1-hour dwell time, the patient should reposition approximately every 15 minutes from left to right, back and abdomen to maximize bladder surface exposure.

If, during the dwell time, the patient exhibits bladder cramping or premature voiding, repositioning of the patient may be adjusted or discontinued. Evacuate ADSTILADRIN from the bladder as part of routine emptying of the bladder, or the patient may void and completely empty the bladder after 1 hour has elapsed. Voided urine should be disinfected for 15 minutes with an equal volume of virucidal agent before flushing of the toilet.

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 safety of ADSTILADRIN was evaluated in Study CS-003, a multicenter, single-arm, open-label study in 157 U.S. patients with high-risk BCG‑unresponsive NMIBC, 107 of whom had BCG-unresponsive carcinoma in situ (CIS) with or without papillary tumors. Patients received vp/mL ADSTILADRIN administered intravesically once every 3 months for up to 12 months.

All patients with an absence of high-risk recurrence or progression were offered continued treatment every 3 months beyond 12 months. The median number of instillations of ADSTILADRIN was 2 (range 1 to 5). Serious adverse reactions occurred in 11% of patients who received ADSTILADRIN.

Serious adverse reactions occurring in >1% of patients included coronary artery disease and hematuria (blood in urine). Permanent discontinuation of ADSTILADRIN due to an adverse reaction occurred in 3 (1.9%) patients. Adverse reactions that resulted in permanent discontinuation of ADSTILADRIN included bladder spasm instillation site discharge, and benign neoplasm of the bladder.

Dosage interruptions of ADSTILADRIN due to an adverse reaction occurred in 54 (34%) patients. Adverse reactions in >10% of patients that required dosage interruption included instillation site discharge, bladder spasm, and micturition urgency. The most common (>10%) adverse reactions, including laboratory abnormalities (>15%), were glucose increased, instillation site discharge, triglycerides increased, fatigue, bladder spasm, micturition (urination) urgency, creatinine increased, hematuria (blood in urine), phosphate decreased, chills, dysuria, and pyrexia (fever).

Tables 1 and 2 summarize adverse reactions and laboratory abnormalities, respectively, in patients on ADSTILADRIN in CS-003. Clinically relevant adverse reaction in <10% of patients who received ADSTILADRIN include syncope (fainting) (1.3%). Table 2 summarizes the laboratory abnormalities in CS-003.

Table 2: Selected Laboratory Abnormalities (>15.0%) That Worsened from Baseline in Patients with NMIBC in CS-003

Pregnancy Risk Summary Adequate and well-controlled studies with ADSTILADRIN have not been conducted in pregnant women. Animal reproductive and developmental toxicity studies have not been conducted with ADSTILADRIN. Advise pregnant women of the potential risk to a fetus.

In the U.S. general population, the estimated background risk of major birth defects and miscarriage in clinically recognized pregnancies is respectively.

Pediatric Use Safety and effectiveness of ADSTILADRIN in pediatric patients have not been established.

ADSTILADRIN is contraindicated in patients with prior hypersensitivity reactions to interferon alfa or to any component of the product.