Information about Regorafenib
Regorafenib is an oral multi-kinase inhibitor that is used in the therapy of refractory metastatic colorectal cancer, hepatocellular carcinoma and gastrointestinal stromal tumor.
Liver safety of Regorafenib
Regorafenib has been associated with frequent serum aminotransferase elevations during therapy and with rare, but sometimes severe and even fatal instances of clinically apparent liver injury.
Mechanism of action of Regorafenib
Regorafenib (re goe raf’ e nib) is an orally available, small molecule, multi-specific kinase inhibitor with activity against vascular endothelial growth factors (VEGF) receptors -1, -2 and -3, as well as against the receptor for platelet derived growth factor (PDGF) and several RAF kinases, c-Kit and TIE2. Inhibition of these kinases decreases angiogenesis, which plays an important role in the growth and spread of several forms of solid tumors.
FDA approval information for Regorafenib
Regorafenib received approval for use in the United States in 2012 for therapy of metastatic colorectal cancer and advanced, unresectable gastrointestinal stromal tumors after failure of other antineoplastic agents. Indications were extended in 2017 to include refractory hepatocellular carcinoma. Regorafenib is available in tablets of 40 mg under the brand name Stivarga.
Dosage and administration for Regorafenib
The typical dose is 160 mg once daily for 21 days in 28 day cycles continued until there is tumor progression or unacceptable toxicity.
Side effects of Regorafenib
Side effects are common and can include fatigue, diarrhea, anorexia, weight loss, nausea, abdominal pain, hand-foot syndrome, hypertension, mucositis, dysphonia, infections, rash and fever. Uncommon, but potentially severe side effects include bleeding, poor wound healing, gastrointestinal perforation and fistula, hypertension, severe skin toxicities, cardiac ischemia and reversible posterior leukoencephalopathy syndrome.
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