Blinatumomab


Thông tin thuốc gốc
Chỉ định và Liều dùng
Intravenous
Philadelphia chromosome-negative precursor B-cell acute lymphoblastic leukaemia
Adult: Patient with relapsed or refractory cases ≥45 kg: Cycle 1: 9 mcg daily given on days 1-7, followed by 28 mcg daily given on days 8-28. Cycle 2: 28 mcg daily given on days 1-28; <45 kg: Cycle 1: 5 mcg/m2 up to Max 9 mcg daily given on days 1-7, followed by 15 mcg/m2 up to Max 28 mcg daily given on days 8-28. Cycle 2: 15 mcg/m2 up to Max 28 mcg daily given on days 1-28. If complete remission is achieved after 2 cycles, may give additional 3 consolidation treatment cycles, based on individual benefits-risks assessment. Patient with minimal residual disease (MRD) ≥0.1%: ≥45 kg: Cycles 1-4: 28 mcg daily given on days 1-28; <45 kg: Cycles 1-4: 15 mcg/m2 up to Max 28 mcg daily given on days 1-28. Each treatment cycle lasts for 42 days consisting of 28 days continuous infusion followed by 14 days treatment-free interval. All doses are given via continuous IV infusion. Premedicate with dexamethasone prior to therapy. Dose reduction, interruption, or discontinuation may be required according to individual safety and tolerability (refer to detailed product guideline).
Child: Patient with relapse or refractory cases after at least 2 prior therapies, or in relapse following prior allogeneic hematopoietic stem cell transplantation: ≥1 year Same as adult dose.
Hướng dẫn pha thuốc
Reconstitute vial with 3 mL sterile water for inj to make a final concentration of 12.5 mcg/mL. Gently swirl, do not shake. For specific reconstitution and dilution instructions for each dose and infusion time, refer to the detailed product guideline.
Chống chỉ định
Lactation.
Thận trọng
Patient with history or presence of clinically relevant CNS pathology (e.g. stroke, epilepsy, paresis, aphasia, severe brain injuries, Parkinson’s disease, cerebellar disease, organic brain syndrome, dementia, psychosis); history of neurologic signs and symptoms (e.g. dizziness, hypoaesthesia, hyporeflexia, dysaesthesia, memory impairment); prior treatment with cranial irradiation and anti-leukaemic chemotherapy (e.g. systemic high dose methotrexate or intrathecal cytarabine); higher leucocytosis or a high tumour burden. Renal and hepatic impairment. Children and elderly. Pregnancy. Concomitant use with live viral vaccines.
Phản ứng phụ
Significant: Anaemia, thrombocytopenia, transient elevation in liver enzymes, leukoencephalopathy, progressive multifocal leukoencephalopathy, disseminated intravascular coagulation, capillary leak syndrome, haemophagocytic histiocytosis or macrophage activation syndrome.
Blood and lymphatic system disorders: Leukocytosis.
Cardiac disorders: Tachycardia, arrhythmia.
Gastrointestinal disorders: Nausea, vomiting, diarrhoea, constipation, abdominal pain.
General disorders and admin site conditions: Chills, ataxia.
Immune system disorders: Hypersensitivity.
Infections and infestations: Bacterial, fungal and viral infections.
Investigations: Decreased immunoglobulins, weight increased.
Musculoskeletal and connective tissue disorders: Back pain, pain in extremity, bone pain.
Nervous system disorders: Headache, tremor, somnolence, dizziness, paraesthesia.
Psychiatric disorders: Insomnia, aphasia.
Respiratory, thoracic and mediastinal disorders: Cough, dyspnoea, respiratory failure.
Skin and subcutaneous tissue disorders: Rash.
Vascular disorders: Hypertension, flushing.
Potentially Fatal: Bone marrow suppression (e.g. neutropenia and febrile neutropenia); cytokine release syndrome; serious infections (e.g. sepsis, pneumonia, bacteraemia, opportunistic and catheter site infections); neurological toxicities (e.g. encephalopathy, convulsions); pancreatitis; tumour lysis syndrome.
Thông tin tư vấn bệnh nhân
This drug may cause confusion and disorientation, if affected, do not drive or operate machinery.
MonitoringParameters
Monitor CBC with differential, LFTs, serum uric acid, electrolytes and neurological exam at baseline and during therapy. Assess for signs and symptoms of infection, neurotoxicity, tumour lysis syndrome, pancreatitis, cytokine release syndrome and infusion-related reactions.
Quá liều
Symptoms: Headache, fever, and tremors. Management: Temporarily interrupt infusion and provide supportive treatment. Reinitiate therapy no earlier than 12 hours after infusion interruption.
Tương tác
May enhance adverse effect of live viral vaccines. May alter the serum concentration or increase risk of toxic effect of CYP450 substrates with narrow therapeutic index (e.g. warfarin, ciclosporin).
Tác dụng
Description: Blinatumomab, a bispecific T-cell engager (BiTE) monoclonal antibody, binds to CD19 expressed on B-cells and CD3 expressed on T-cells which then activates endogenous T-cells by connecting CD3 in the T-cell receptor complex with the CD19 on benign and malignant B-cells, thereby forming a cytolytic synapse between a cytotoxic T-cell and a cancer target B-cell. It mediates the production of cytolytic proteins, release of inflammatory cytokines, and proliferation of T cells; resulting in the lysis of CD 19-positive cells.
Pharmacokinetics:
Distribution: Volume of distribution: 4.35 L.
Excretion: Via urine (negligible amounts). Elimination half-life: 2.1 hours.
Bảo quản
Store between 2-8°C. Do not freeze. Protect from light. This is a cytotoxic drug. Any unused portions should be disposed of in accordance with local requirements.
Phân loại MIMS
Phân loại ATC
L01XC19 - blinatumomab ; Belongs to the class of monoclonal antibodies, other antineoplastic agents. Used in the treatment of cancer.
References
Anon. Blinatumomab. AHFS Clinical Drug Information [online]. Bethesda, MD. American Society of Health-System Pharmacists, Inc. https://www.ahfscdi.com. Accessed 06/05/2019.

Anon. Blinatumomab. Lexicomp Online. Hudson, Ohio. Wolters Kluwer Clinical Drug Information, Inc. https://online.lexi.com. Accessed 06/05/2019.

Blincyto (Amgen Inc). DailyMed. Source: U.S. National Library of Medicine. https://dailymed.nlm.nih.gov/dailymed/. Accessed 06/05/2019.

Buckingham R (ed). Blinatumomab. Martindale: The Complete Drug Reference [online]. London. Pharmaceutical Press. https://www.medicinescomplete.com. Accessed 06/05/2019.

Joint Formulary Committee. Blinatumomab. British National Formulary [online]. London. BMJ Group and Pharmaceutical Press. https://www.medicinescomplete.com. Accessed 06/05/2019.

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