From Mdwiki - Reading time: 9 min| Names | |
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| Trade names | Gavreto |
| Other names | BLU-667 |
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| Clinical data | |
| Drug class | Tyrosine kinase inhibitor[1] |
| Main uses | Non-small cell lung cancer (NSCLC), thyroid cancer[1] |
| Side effects | Constipation, high blood pressure, tiredness, muscle pain, low blood cells, liver problems, low calcium[1] |
| Routes of use | By mouth |
| Typical dose | 400 mg OD[1] |
| External links | |
| AHFS/Drugs.com | Monograph |
| MedlinePlus | a620057 |
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| Chemical and physical data | |
| Formula | C27H32FN9O2 |
| Molar mass | 533.612 g·mol−1 |
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Pralsetinib, sold under the brand name Gavreto, is a medication used to treat non-small cell lung cancer (NSCLC) and thyroid cancer.[1] It is used in advanced cases which are RET fusion-positive.[1] It is taken by mouth.[1]
Common side effects include constipation, high blood pressure, tiredness, muscle pain, low blood cells, liver problems, and low calcium.[1] Other side effects may include pneumonitis, bleeding, tumor lysis syndrome, and poor wound healing.[1] Use in pregnancy may harm the baby.[1] It is a tyrosine kinase inhibitor.[1]
Pralsetinib was approved for medical use in the United States in 2020.[1] In the United States it costs about 20,100 USD per month.[2] It is not approved for use in the United Kingdom as of 2021.[3]
Pralsetinib is indicated for the treatment of adults with metastatic RET fusion-positive non-small cell lung cancer (NSCLC) as detected by an FDA approved test.[4][5]
It is generally taken at a dose of 400 mg once daily.[1]

Efficacy was investigated in a multicenter, open-label, multi-cohort clinical trial (ARROW, NCT03037385) with 220 participants aged 26-87 whose tumors had RET alterations.[4][5] Identification of RET gene alterations was prospectively determined in local laboratories using either next generation sequencing, fluorescence in situ hybridization, or other tests.[4] The main efficacy outcome measures were overall response rate (ORR) and response duration determined by a blinded independent review committee using RECIST 1.1.[4] The trial was conducted at sites in the United States, Europe and Asia.[5]
Efficacy for RET fusion-positive NSCLC was evaluated in 87 participants previously treated with platinum chemotherapy.[4] The ORR was 57% (95% CI: 46%, 68%); 80% of responding participants had responses lasting 6 months or longer.[4] Efficacy was also evaluated in 27 participants who never received systemic treatment.[4] The ORR for these participants was 70% (95% CI: 50%, 86%); 58% of responding participants had responses lasting 6 months or longer.[4]
The US Food and Drug Administration (FDA) granted the application for pralsetinib priority review, orphan drug, and breakthrough therapy designations[4]and granted approval of Gavreto to Blueprint Medicines.[4]
On 16 September 2021, the Committee for Medicinal Products for Human Use (CHMP) of the European Medicines Agency (EMA) adopted a positive opinion, recommending the granting of a conditional marketing authorization for the medicinal product Gavreto, intended for the treatment of people with rearranged during transfection (RET)-fusion positive non-small cell lung cancer (NSCLC).[7] The applicant for this medicinal product is Roche Registration GmbH.[7]
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