Obtain liver function tests (ALT, AST, and bilirubin) before initiation of Stivarga and monitor at least every 2 weeks during the first 2 months of treatment. Thereafter, monitor monthly or more frequently as clinically indicated. Monitor liver function tests weekly in patients experiencing elevated liver function tests until improvement to less than 3 times the upper limit of normal (ULN) or baseline values. Temporarily hold and then reduce or permanently discontinue Stivarga, depending on the severity and persistence of hepatotoxicity as manifested by elevated liver function tests or hepatocellular necrosis.
Stivarga caused an increased incidence of hemorrhage. The overall incidence (Grades 1-5) was 21% and 11% with Stivarga vs 8% and 3% with placebo in mCRC and GIST patients, respectively. Fatal hemorrhage occurred in 4 of 632 (0.6%) Stivarga-treated patients and involved the respiratory, gastrointestinal, or genitourinary tracts. Permanently discontinue Stivarga in patients with severe or life-threatening hemorrhage and monitor INR levels more frequently in patients receiving warfarin.
Stivarga caused an increased incidence of hand-foot skin reaction (HFSR) (also known as palmar-plantar erythrodysesthesia [PPE]) and severe rash, frequently requiring dose modification. The overall incidence was 45% and 67% with Stivarga vs 7% and 12% with placebo in mCRC and GIST patients, respectively. Incidence of Grade 3 HFSR (17% vs 0% in mCRC and 22% vs 0% in GIST), Grade 3 rash (6% vs <1% in mCRC and 7% vs 0% in GIST), serious adverse reactions of erythema multiforme (0.2% vs 0% in mCRC), and Stevens-Johnson syndrome (0.2% vs 0% in mCRC) was higher in Stivarga-treated patients. Toxic epidermal necrolysis occurred in 0.17% of 1200 Stivarga-treated patients across all clinical trials. Withhold Stivarga, reduce the dose, or permanently discontinue depending on the severity and persistence of dermatologic toxicity.
Stivarga caused an increased incidence of hypertension (30% vs 8% in mCRC and 59% vs 27% in GIST with Stivarga vs placebo, respectively). Hypertensive crisis occurred in 0.25% of 1200 Stivarga-treated patients across all clinical trials. Do not initiate Stivarga until blood pressure is adequately controlled. Monitor blood pressure weekly for the first 6 weeks of treatment and then every cycle, or more frequently, as clinically indicated. Temporarily or permanently withhold Stivarga for severe or uncontrolled hypertension.
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