The most common adverse events (AEs) attributed to either vemurafenib or GDC-0973 in the 70 patients treated to date were: non-acneiform rash (52.9%; 7.1% Grade 3 or 4), diarrhea (51.4%; 5.7%), photosensitivity/sunburn (31.4%; 0%), fatigue (30.0%; 1.4%), and nausea (28.6%; 1.4%). Selected AEs attributed to either vemurafenib or GDC-0973 were: creatinine phosphokinase elevation (20.0%; 4.3%), liver function test elevation (20.0%; 4.3%), arthralgia (12.9%; 1.4%), serous choreoretinopathy (4.3%; 0%), and cutaneous squamous cell carcinoma (1.4%; 1.4%).Temporary interruptions in vemurafenib, GDC-0973, or the combination of both agents were reported in 24.3%, 21.4%, and 8.6% of patients, respectively. One patient receiving the combination discontinued vemurafenib permanently because of QT interval prolongation. No patients receiving the combination of vemurafenib and GDC-0973 discontinued treatment due to an adverse event.
Exelixis Announces Data Presentation For GDC-0973 (XL518)
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