TYKERB(R) (Lapatinib) to be Investigated in Landmark Early Breast Ca... (progression and metastases.Overexpressio...)

TYKERB(R) (Lapatinib) to be Investigated in Landmark Early Breast Cancer Trial

Date:5/12/2008

progression and metastases. Overexpression of this receptor has been reported in a variety of human tumors and is associated with poor prognosis and reduced overall survival. On March 13, 2007, the United States Food and Drug Administration (FDA) approved TYKERB, in combination with capecitabine, for the treatment of patients with advanced or metastatic breast cancer whose tumors overexpress HER2 and who have received prior therapy including an anthracycline, a taxane, and trastuzumab.(4) TYVERB recently received a positive opinion from the Committee for Medical Products for Human Use (CHMP) of Europe. Marketing authorization is pending.

Important Safety Information*

TYKERB has been associated with hepatotoxicity. The hepatotoxicity may be severe and deaths have been reported. Causality is uncertain. Patients should receive liver function tests before initiation of treatment, every 4 to 6 weeks during treatment, and as clinically indicated. A dose reduction in patients with severe pre-existing hepatic impairment should be considered. Discontinue and do not restart TYKERB if patients experience severe changes in liver function tests.

As with other therapies for HER2 overexpression, TYKERB has been associated with reports of decreases in left ventricular ejection fraction (LVEF). Caution should be taken if TYKERB is to be administered to patients with pre-existing cardiac conditions, including uncontrolled or symptomatic angina, arrhythmias, or congestive heart failure. LVEF should be evaluated in all patients prior to and during treatment with TYKERB.

Diarrhea was the most common adverse event resulting in discontinuation of study medication. Proactive management of diarrhea with anti-diarrheal agents is important, and severe cases of diarrhea may require administration of oral or intravenous electrolytes and fluids and interruption or discontinuation of therapy with TYKERB.

TYKERB has been associated with interstitial lun
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