Imfinzi
Imfinzi Uses, Dosage, Side Effects, Food Interaction and all others data.
Imfinzi is a human immunoglobulin G1 kappa (IgG1κ) monoclonal antibody and a novel immune-checkpoint inhibitor for cancer treatment. Produced by recombinant DNA technology in Chinese Hamster Ovary (CHO) cell suspension culture, durvalumab is a programmed death-ligand 1 (PD-L1) blocking antibody that works to promote normal immune responses that attack tumour cells.
Imfinzi is marketed under the brand name Imfinzi, which is available for intravenous injections. It was granted accelerated approval by the FDA in May 2017 for the treatment of selected patients with locally advanced or metastatic urothelial carcinoma. In September 2018, durvalumab was approved by the EMA for the treatment of adult patients with locally advanced, unresectable non-small cell lung cancer (NSCLC), only if PD-L1 is expressed in ≥ 1% of tumour cells and there was no observable disease progression following platinum-based chemoradiation therapy. On March 27, 2020, durvalumab was approved by the FDA for use in combination with etoposide and either carboplatin or cisplatin as first-line treatment of patients with extensive-stage small cell lung cancer (ES-SCLC).
Imfinzi is an anticancer antibody that works to promote the antitumour responses mediated by immune cells. By blocking the action of PD-L1, durvalumab exerts its anticancer effects by increasing T-cell activation, enhancing detection and ablation of tumour cells. In in vitro assays, durvalumab inhibited the activity of PD-L1 in a concentration-dependent manner. In co-engrafted human tumor and immune cell xenograft mouse models, durvalumab was effective in decreasing tumour size. Imfinzi does not mediate antibody-dependent cell-mediated cytotoxicity (ADCC).
| Trade Name | Imfinzi |
| Availability | Prescription only |
| Generic | Durvalumab |
| Durvalumab Other Names | Durvalumab |
| Related Drugs | Opdivo, methotrexate, Keytruda, pembrolizumab, cisplatin, Tagrisso, Avastin, atezolizumab, etoposide, Tecentriq |
| Weight | 50mg/ml, |
| Type | Infusion, Intravenous Solution |
| Formula | C6502H10018N1742O2024S42 |
| Weight | 146300.0 Da |
| Protein binding | There is limited information on the serum protein binding profile of durvalumab. |
| Groups | Approved, Investigational |
| Therapeutic Class | |
| Manufacturer | AstraZeneca UK Limited |
| Available Country | Australia, United Kingdom, United States, |
| Last Updated: | September 19, 2023 at 7:00 am |
Uses
Imfinzi is an antineoplastic monoclonal antibody used to treat urothelial carcinoma and locally advanced, unresectable non-small cell lung cancer.
Imfinzi is indicated for the treatment of patients with locally advanced or metastatic urothelial carcinoma who have disease progression during or following platinum-containing chemotherapy, or within 12 months of neoadjuvant or adjuvant treatment with platinum-containing chemotherapy.
Imfinzi is indicated for the treatment of patients with unresectable Stage III non-small cell lung cancer (NSCLC) whose disease has not progressed following concurrent platinum-based chemotherapy and radiation therapy. It is also approved for the treatment of patients with extensive-stage small cell lung cancer (ES-SCLC) in combination with etoposide and either carboplatin or cisplatin as first-line therapy.
Imfinzi is indicated as monotherapy used for the treatment of locally advanced, unresectable non-small cell lung cancer (NSCLC) in adults whose tumours express PD-L1 on ≥ 1% of tumour cells and whose disease has not progressed following platinum-based chemoradiation therapy.
Imfinzi is also used to associated treatment for these conditions: Unresectable Stage III Non-small Cell Lung Cancer, Urothelial carcinoma ureter metastatic, Locally advanced Urothelial Carcinoma, Unresectable, locally advanced PD-L1 positive Lung Cancer Non-Small Cell Cancer (NSCLC)
How Imfinzi works
Because cancer cells express antigens that are recognized and taken up by antigen-presenting cells (APCs), the immune responses prime and activate cytotoxic T cells, and allow them to travel to the site of tumour to destroy cancer cells. However, tumours often evade T cell-mediated immune responses to enhance their survival. Inflammatory mediators, such as IFN-gamma, induce the expression of programmed cell death ligand-1 (PD-L1), which is a type 1 transmembrane protein expressed on tumour cells and tumour-associated immune cells in the tumour microenvironment. PD-L1 acts as an immune checkpoint to regulate immune responses. PD-L1 is a ligand to PD-1, which is a cell surface receptor expressed on activated T cells in peripheral tissues following antigen exposure. Both PD-L1 and PD-1 are co-inhibitory molecules involved in blocking T cell-mediated immune responses. PD-L1 also interacts with CD-80, which is a receptor constitutively expressed by T cells and is upregulated early after T cell activation.
The expression of PD-L1 is an adaptive immune response by tumour cells, resulting in over-expression of the molecule in some cancers. PD-L1 interacts with PD-1 and CD80, which leads to blocked cytotoxic T cell activation, T cell proliferation, and cytokine production. By binding to PD-L1 and preventing its association with PD-1 and CD80, durvalumab activates the immune responses mediated by cytotoxic T cells that attack tumour cells. Imfinzi displays selective and high affinity toward PD-L1 but not PD-L2, which is a regulatory ligand expressed in tumour cells to a lesser extent and involved in regulating inflammation and differentiation of T cells.
Toxicity
There is limited information about the overdose profile and LD50 of durvalumab. In case of overdose, the patient should be closely monitored for drug-related adverse events, and appropriate symptomatic treatment should be immediately initiated. Based on the findings of clinical studies, durvalumab had a risk of causing immune-mediated reactions, such as pneumonitis, hepatitis, and other serious infections. In animal reproductive studies, durvalumab caused fetal harm and this fetal toxicity may be possible in humans.
Food Interaction
No interactions found.Imfinzi Drug Interaction
Moderate: methylprednisolone, budesonide / formoterolUnknown: 5-hydroxytryptophan, paclitaxel protein-bound, ascorbic acid, tadalafil, doxorubicin, ibuprofen, amoxicillin / clavulanate, diphenhydramine, arformoterol, apixaban, polyethylene glycol 3350, famotidine, albuterol, tiotropium, olodaterol / tiotropium, paclitaxel, acetaminophen, cholecalciferol
Imfinzi Disease Interaction
Moderate: adrenal insufficiency, colitis, diabetes, infections, liver dysfunction, renal dysfunction, thyroid disorders, Durvalumab – pneumonitis
Volume of Distribution
In patients receiving the dose range of ≥ 10 mg/kg every 2 weeks, the mean steady state volume of distribution (Vss) was 5.64 L.
Elimination Route
Imfinzi exhibits a dose-proportional pharmacokinetic profile that is non-linear at doses 7
Half Life
Based on baseline clearance rate, the geometric mean terminal half-life is 18 days.
Clearance
Clearance of durvalumab decreases over time, resulting in a mean steady-state clearance (CLss) of 8.2 mL/h following 365 days of initial drug administration. However, the decrease in CLss is not considered clinically relevant.
Elimination Route
Imfinzi is primarily eliminated by protein catabolism.
Innovators Monograph
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