IMPORTANT SAFETY INFORMATION
WARNING: CYTOKINE RELEASE SYNDROME and NEUROLOGICAL TOXICITIES including IMMUNE EFFECTOR
CELL-ASSOCIATED NEUROTOXICITY SYNDROME
- Cytokine Release Syndrome (CRS), which may be life-threatening or fatal, occurred in
patients
receiving BLINCYTO®. Interrupt or discontinue BLINCYTO® and treat with
corticosteroids as
recommended.
- Neurological toxicities, including immune effector cell-associated neurotoxicity
syndrome
(ICANS) which may be severe, life-threatening or fatal, occurred in patients receiving
BLINCYTO®. Interrupt or discontinue BLINCYTO® as recommended.
Contraindications
BLINCYTO® is contraindicated in patients with a known hypersensitivity to blinatumomab or
to any
component of the product formulation.
Warnings and Precautions
- Cytokine Release Syndrome (CRS): CRS, which may be life-threatening or fatal,
occurred in patients receiving BLINCYTO®. The median time to onset of CRS is 2 days
after the start of
infusion and the median time to resolution of CRS was 5 days among cases that resolved. Closely
monitor and advise patients to contact their healthcare professional for signs and symptoms of
serious adverse events such as fever, headache, nausea, asthenia, hypotension, increased alanine
aminotransferase (ALT), increased aspartate aminotransferase (AST), increased total bilirubin,
and disseminated intravascular coagulation (DIC). The manifestations of CRS after treatment
with BLINCYTO® overlap with those of infusion reactions, capillary leak syndrome
(CLS), and
hemophagocytic histiocytosis/macrophage activation syndrome (MAS). Using all of these terms to
define CRS in clinical trials of BLINCYTO, CRS was reported in 15% of patients with R/R ALL, in
7% of patients with MRD-positive ALL, and in 16% of patients receiving BLINCYTO®
cycles in the
consolidation phase of therapy. If severe CRS occurs, interrupt BLINCYTO® until CRS
resolves.
Discontinue BLINCYTO® permanently if life-threatening CRS occurs. Administer
corticosteroids for
severe or life-threatening CRS.
- Neurological Toxicities, including Immune Effector Cell-Associated Neurotoxicity
Syndrome:
BLINCYTO® can cause serious or life-threatening neurologic toxicity, including
ICANS. The
incidence of neurologic toxicities in clinical trials was approximately 65%. The median time to
the first event was within the first 2 weeks of BLINCYTO®treatment. The most common
(≥10%)
manifestations of neurological toxicity were headache and tremor. Grade 3 or higher neurological
toxicities occurred in approximately 13% of patients, including encephalopathy, convulsions,
speech disorders, disturbances in consciousness, confusion and disorientation, and coordination
and balance disorders. Manifestations of neurological toxicity included cranial nerve
disorders. The majority of neurologic toxicities resolved following interruption of
BLINCYTO®,
but some resulted in treatment discontinuation.
The incidence of signs and symptoms consistent with ICANS in clinical trials was 7.5%. The
onset
of ICANS can be concurrent with CRS, following resolution of CRS, or in the absence of CRS.
There is limited experience with BLINCYTO® in patients with active ALL in the
central nervous
system (CNS) or a history of neurologic events. Patients with a history or presence of
clinically relevant CNS pathology were excluded from clinical studies. Patients with Down
Syndrome over the age of 10 years may have a higher risk of seizures with
BLINCYTO® therapy.
Monitor patients for signs and symptoms of neurological toxicities, including ICANS, and
interrupt or discontinue BLINCYTO® as outlined in the PI. Advise outpatients to
contact their
healthcare professional if they develop signs or symptoms of neurological toxicities.
- Infections: Approximately 25% of patients receiving BLINCYTO® in
clinical trials experienced
serious infections such as sepsis, pneumonia, bacteremia, opportunistic infections, and
catheter-site infections, some of which were life-threatening or fatal. Administer prophylactic
antibiotics and employ surveillance testing as appropriate during treatment. Monitor patients
for signs or symptoms of infection and treat appropriately, including interruption or
discontinuation of BLINCYTO®as needed.
- Tumor Lysis Syndrome (TLS), which may be life-threatening or fatal, has been
observed.
Preventive measures, including pretreatment nontoxic cytoreduction and on-treatment hydration,
should be used during BLINCYTO® treatment. Monitor patients for signs and symptoms of
TLS and
interrupt or discontinue BLINCYTO® as needed to manage these events.
- Neutropenia and Febrile Neutropenia, including life-threatening cases, have
been observed.
Monitor appropriate laboratory parameters (including, but not limited to, white blood cell count
and absolute neutrophil count) during BLINCYTO® infusion and interrupt
BLINCYTO® if prolonged
neutropenia occurs.
- Effects on Ability to Drive and Use Machines: Due to the possibility of
neurological events,
including seizures and ICANS, patients receiving BLINCYTO® are at risk for loss of
consciousness, and should be advised against driving and engaging in hazardous occupations or
activities such as operating heavy or potentially dangerous machinery while
BLINCYTO®is being
administered.
- Elevated Liver Enzymes: Transient elevations in liver enzymes have been
associated with
BLINCYTO® treatment with a median time to onset of 3 days. In patients receiving
BLINCYTO®,
although the majority of these events were observed in the setting of CRS, some cases of
elevated liver enzymes were observed outside the setting of CRS, with a median time to onset of
19 days. Grade 3 or greater elevations in liver enzymes occurred in approximately 7% of patients
outside the setting of CRS and resulted in treatment discontinuation in less than 1% of
patients. Monitor ALT, AST, gamma-glutamyl transferase, and total blood bilirubin prior to the
start of and during BLINCYTO® treatment. BLINCYTO® treatment should be
interrupted if
transaminases rise to > 5 times the upper limit of normal (ULN) or if total bilirubin rises to >
3 times ULN.
- Pancreatitis: Fatal pancreatitis has been reported in patients receiving
BLINCYTO® in
combination with dexamethasone in clinical trials and the post-marketing setting. Evaluate
patients who develop signs and symptoms of pancreatitis and interrupt or discontinue
BLINCYTO® and dexamethasone as needed.
- >Leukoencephalopathy: Although the clinical significance is unknown, cranial
magnetic resonance
imaging (MRI) changes showing leukoencephalopathy have been observed in patients receiving
BLINCYTO®, especially in patients previously treated with cranial irradiation and
antileukemic
chemotherapy.
- Preparation and administration errors have occurred with BLINCYTO®
treatment. Follow
instructions for preparation (including admixing) and administration in the PI strictly to
minimize medication errors (including underdose and overdose).
- Immunization: Vaccination with live virus vaccines is not recommended for at
least 2 weeks prior
to the start of BLINCYTO® treatment, during treatment, and until immune recovery
following last
cycle of BLINCYTO®.
- Benzyl Alcohol Toxicity in Neonates: Serious adverse reactions, including fatal
reactions and
the “gasping syndrome,” have been reported in very low birth weight (VLBW) neonates born
weighing less than 1500 g, and early preterm neonates (infants born less than 34 weeks
gestational age) who received intravenous drugs containing benzyl alcohol as a preservative.
Early preterm VLBW neonates may be more likely to develop these reactions because they may be
less able to metabolize benzyl alcohol.
Use the preservative-free preparations of BLINCYTO® where possible in neonates.
When
prescribing
BLINCYTO® (with preservative) for neonatal patients, consider the combined daily
metabolic
load
of benzyl alcohol from all sources including BLINCYTO® (with preservative), other
products
containing benzyl alcohol or other excipients (e.g., ethanol, propylene glycol) which
compete
with benzyl alcohol for the same metabolic pathway.
Monitor neonatal patients receiving BLINCYTO® (with preservative) for new or
worsening
metabolic
acidosis. The minimum amount of benzyl alcohol at which serious adverse reactions may occur
inneonates is not known. The BLINCYTO® 7-Day bag (with preservative) contains 7.4
mg of
benzyl
alcohol per mL
- Embryo-Fetal Toxicity: Based on its mechanism of action, BLINCYTO®
may cause fetal harm when
administered to a pregnant woman. Advise pregnant women of the potential risk to the fetus.
Advise females of reproductive potential to use effective contraception during treatment with
BLINCYTO® and for 48 hours after the last dose.
Adverse Reactions
- The safety of BLINCYTO® in adult and pediatric patients one month and older with
MRD-positive
B-cell precursor ALL (n=137), relapsed or refractory B-cell precursor ALL (n=267), and
Philadelphia chromosome-negative B cell precursor ALL in consolidation (n=165) was evaluated in
clinical studies. The most common adverse reactions (≥ 20%) to BLINCYTO® in this
pooled
population were pyrexia, infusion-related reactions, headache, infection, musculoskeletal pain,
neutropenia, nausea, anemia, thrombocytopenia, and diarrhea.
Dosage and Administration Guidelines
- BLINCYTO® is administered as a continuous intravenous infusion at a constant flow
rate using an
infusion pump which should be programmable, lockable, non-elastomeric, and have an alarm.
- It is very important that the instructions for preparation (including admixing) and
administration provided in the full Prescribing Information are strictly followed to minimize
medication errors (including underdose and overdose).
INDICATIONS FOR BLINCYTO®
BLINCYTO® (blinatumomab) is indicated for the treatment of CD19-positive B-cell precursor
acute
lymphoblastic leukemia (ALL) in adult and pediatric patients one month and older with:
- Philadelphia chromosome-negative disease in the consolidation phase of multiphase chemotherapy
- Minimal residual disease (MRD) greater than or equal to 0.1% in first or second complete
remission
- Relapsed or refractory disease
Please see BLINCYTO® full Prescribing Information, including BOXED
WARNINGS.