Warnings for Tzield
Included as part of the PRECAUTIONS section.
Precautions for Tzield
Viral Reactivation
Serious, life-threatening cases of viral reactivation, including EBV and CMV have been reported with Tzield. During and within 2 months of Tzield treatment, if primary infection or reactivation of EBV or CMV occurs, it may present with increased severity, including EBV- associated lymphoproliferative disease and organ failure. Patients who are immunocompromised, including patients with Down syndrome, may be at increased risk. The majority of serious viral reactivation cases occurred in patients who continued Tzield despite persistent, severe lymphopenia [see PRECAUTIONS].
Prior to initiating treatment with Tzield, evaluate patients for active EBV and CMV infection and confirm undetectable viral load (e.g., PCR testing). Tzield is not recommended in patients with laboratory or clinical evidence of active EBV or CMV infection [see DOSAGE AND ADMINISTRATION].
During treatment with Tzield, regularly monitor lymphocyte counts [see DOSAGE AND ADMINISTRATION, PRECAUTIONS] and monitor patients for signs and symptoms of viral reactivation during treatment and for at least 2 months following the last infusion. If viral reactivation is suspected, discontinue Tzield and obtain viral load (e.g., PCR) promptly. Consider appropriate expert consultation for diagnostic testing recommendations as some diagnostic tests may give inaccurate results in immunosuppressed patients. If viral reactivation is confirmed, permanently discontinue Tzield [see DOSAGE AND ADMINISTRATION]. Consider appropriate expert consultation for the management of severe viral reactivation.
Cytokine Release Syndrome
Cytokine release syndrome (CRS) has been observed in TZIELD-treated patients. In clinical trials, CRS was reported in 5% of TZIELD-treated patients compared to 0.8% of control-treated patients during the treatment period and through 28 days after the last study drug administration. CRS manifestations in TZIELD-treated patients included fever, nausea, fatigue, headache, myalgia, arthralgia, increased alanine aminotransferase (ALT), increased aspartate aminotransferase (AST), and increased total bilirubin. These manifestations typically occurred during the first 5 days of TZIELD treatment [see ADVERSE REACTIONS].
To mitigate CRS:
- Premedicate with antipyretics, antihistamines and/or antiemetics prior to TZIELD treatment [see DOSAGE AND ADMINISTRATION].
- Monitor liver enzymes during treatment. Discontinue TZIELD treatment in patients who develop elevated ALT or AST more than 5 times the upper limit of normal (ULN) or bilirubin more than 3 times ULN.
- Treat symptoms of CRS with antipyretics, antihistamines and/or antiemetics. If severe CRS develops, consider temporarily pausing dosing for 1-2 days (and administer the remaining doses to complete the full 14-day course on consecutive days) or discontinuing treatment.
Serious Infections
Bacterial and viral infections have occurred in TZIELD-treated patients. In clinical trials, TZIELD-treated patients had a higher rate of serious infections (3.5%) than control-treated patients (2%), including gastroenteritis, cellulitis, pneumonia, abscess, sepsis [see ADVERSE REACTIONS]. Use of TZIELD is not recommended in patients with active serious infection or chronic infection other than localized skin infections. Monitor patients for signs and symptoms of infection during and after TZIELD treatment. If serious infection develops, treat appropriately, and discontinue TZIELD.
Lymphopenia
In clinical trials, 78% of TZIELD-treated patients developed lymphopenia compared to 11% of control-treated patients. For most TZIELD-treated patients who experienced lymphopenia, lymphocyte levels began to recover after the fifth day of treatment and returned to pre-treatment values within two weeks after treatment completion and without dose interruption. Severe lymphopenia (<500 cells per mcL) lasting 1 week or longer occurred in 0.9% of TZIELD-treated patients, and 0.5% of TZIELD-treated patients permanently discontinued TZIELD because of lymphopenia [see ADVERSE REACTIONS].
Monitor white blood cell counts during the treatment period. If prolonged severe lymphopenia (<500 cells per mcL lasting 1 week or longer) develops, discontinue TZIELD.
Hypersensitivity Reactions
Acute hypersensitivity reactions including serum sickness, angioedema, urticaria, rash, vomiting and bronchospasm occurred in TZIELD-treated patients [see ADVERSE REACTIONS]. If severe hypersensitivity reactions occur, discontinue use of TZIELD and treat promptly.
Vaccinations
The safety of immunization with live-attenuated vaccines in TZIELD-treated patients has not been studied. Additionally, TZIELD may interfere with the immune response to vaccination and decrease vaccine efficacy.
- Administer all age-appropriate vaccinations prior to starting TZIELD [see DOSAGE AND ADMINISTRATION].
- Inactivated or mRNA vaccinations are not recommended within the 2 weeks prior to TZIELD treatment, during treatment, or 6 weeks after completion of treatment.
- Live-attenuated vaccinations are not recommended within the 8 weeks prior to TZIELD treatment, during treatment, or up to 52 weeks after treatment.
Patient Counseling Information
Advise the patient to read the FDA-approved patient labeling (Medication Guide).
Cytokine Release Syndrome
Inform patients about the signs and symptoms of CRS [see WARNINGS AND PRECAUTIONS].
Serious Infections
Inform patients that TZIELD may lower the ability of the immune system to fight infections. Instruct patients to contact their health care provider if they develop any symptoms of infection [see WARNINGS AND PRECAUTIONS].
Lymphopenia
Inform patients that although most TZIELD-treated patients had mild lymphopenia; a few had severe lymphopenia that required stopping TZIELD [see WARNINGS AND PRECAUTIONS].
Hypersensitivity Reactions
Advise patients on the symptoms of hypersensitivity reactions and instruct them to stop taking TZIELD and seek medical attention promptly if such symptoms occur [see WARNINGS AND PRECAUTIONS].
Vaccinations
Advise patient to receive all age-appropriate vaccinations prior to starting TZIELD and avoid concurrent use of live, inactivated, and mRNA vaccines with TZIELD [see WARNINGS AND PRECAUTIONS].
Pregnancy
Advise patients to inform their health care provider of a known or suspected pregnancy. Advise patients who are exposed to TZIELD during pregnancy to contact Provention Bio, Inc.’s Adverse Event reporting line at 1-844-778-2246 [see Use In Specific Populations].
Lactation
Advise a lactating woman that she may interrupt breastfeeding and pump and discard breast milk during treatment and for 20 days after TZIELD administration to minimize drug exposure to a breastfed infant [see Use In Specific Populations].
Nonclinical Toxicology
Carcinogenesis, Mutagenesis, Impairment Of Fertility
No long-term studies have been performed to assess the carcinogenic potential of teplizumab-mzwv.
No studies have been performed to assess the mutagenic potential of teplizumab-mzwv. As an antibody, teplizumab-mzwv is not expected to interact directly with DNA.
Fertility and reproductive performance were unaffected in female and male mice that received a murine surrogate anti-mouse CD3 antibody administered by the subcutaneous route at doses up to 20 mg/kg.
Use In Specific Populations
Pregnancy
Risk Summary
Available case reports from clinical trials with TZIELD are insufficient to identify a drug-associated risk of major birth defects, miscarriage or other adverse maternal or fetal outcomes. Although there are no data on teplizumab-mzwv, monoclonal antibodies can be actively transported across the placenta, and TZIELD may cause immunosuppression in the utero-exposed infant (see Clinical Considerations). To minimize exposure to a fetus, avoid use of TZIELD during pregnancy and at least 30 days (6 half-lives) prior to planned pregnancy.
TZIELD is not active in rodents. In animal reproduction studies, mice were given a surrogate anti-mouse CD3 antibody subcutaneously during organogenesis through lactation. Pups born to dams administered the murine surrogate antibody during pregnancy showed a reduction in the adaptive immune response consistent with the expected pharmacology (see Data).
The estimated background risk of major birth defects and miscarriage for the indicated population is unknown. In the U.S. general population, the background risk of major birth defects and miscarriage in clinically recognized pregnancies is 2%-4% and 15%-20%, respectively.
Report pregnancies to Provention Bio, Inc.’s Adverse Event reporting line at 1-844-778-2246.
Clinical Considerations
Fetal/Neonatal Adverse Reactions
Transport of endogenous IgG antibodies across the placenta increases as pregnancy progresses, and peaks during the third trimester. Because teplizumab-mzwv may interfere with immune response to infections, risks and benefits should be considered prior to administering live vaccines to infants exposed to teplizumab-mzwv in utero. There are insufficient data regarding infant serum levels of teplizumab-mzwv at birth and the duration of persistence of teplizumab-mzwv in infant serum after birth to identify a specific timeframe to delay live virus immunizations in infants exposed in utero.
Data
Animal Data
In an embryo-fetal developmental toxicity study, pregnant mice were administered a murine surrogate anti-mouse CD3 antibody by subcutaneous injection at dose levels of 0, 0.03, 0.3, or 20 mg/kg on Gestation Days 6, 10, and 14. Increase in post-implantation loss occurred in the 20 mg/kg group, in the presence of maternal toxicity.
In a pre- and postnatal development toxicity study in pregnant mice, in which the murine surrogate antibody was administered every 3 days from gestation day 6 through lactation day 19 at doses of 0, 0.3, 3, or 20 mg/kg, no maternal toxicity or increased incidence of post-implantation loss was observed. Reductions in T cell populations and increases in B cells, and a reduction in the adaptive immune response to keyhole limpet hemocyanin (KLH) were observed in the offspring on postnatal days 35 and 84 at 20 mg/kg. The surrogate antibody was present in the offspring serum at level less than 1.5% that of maternal serum at the high dose. A trend towards reduction in fertility was observed in the offspring of dams administered the murine surrogate antibody at 20 mg/kg. The human relevance of this finding is unknown.
Lactation
Risk Summary
There are no data on the presence of teplizumab-mzwv in either human or animal milk, the effects on the breastfed child, or the effects on milk production. Endogenous maternal IgG and monoclonal antibodies are transferred into human milk. The effects of local gastrointestinal exposure and limited systemic exposure in the breastfed infant to teplizumab-mzwv are unknown.
Although the developmental and health benefits of breastfeeding should be considered along with the mother’s clinical need for TZIELD and any potential adverse effects on the breastfed child from TZIELD or from the underlying maternal condition, a lactating woman may interrupt breastfeeding and pump and discard breast milk during treatment and for 20 days after TZIELD administration to minimize drug exposure to a breastfed child.
Pediatric Use
The safety and effectiveness of TZIELD to delay the onset of Stage 3 type 1 diabetes have been established in pediatric patients 8 years of age and older with Stage 2 type 1 diabetes. Use of TZIELD for this indication is supported by evidence from an adequate and well-controlled study (Study TN-10) in adults and pediatric patients 8 years of age and older (including 29 pediatric patients). Adverse reactions observed in pediatric patients 8 years of age and older who received TZIELD were consistent with those reported in adult patients [see ADVERSE REACTIONS].
The safety and effectiveness of TZIELD have not been established in pediatric patients younger than 8 years of age.
Geriatric Use
Stage 2 type 1 diabetes is largely a condition that occurs in pediatric and younger adult patients. Clinical studies of TZIELD to delay the onset of Stage 3 T1D did not include patients 65 years of age and older.