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by Natco Pharma Ltd
Lapatinib 250MG Tablet
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250MG · 30 TABLET(s) IN A BOTTLE
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Lapatinib tablets are indicated in combination with: capecitabine for the treatment of patients with advanced or metastatic breast cancer whose tumors overexpress human epidermal growth factor receptor 2 (HER2) and who have received prior therapy, including an anthracycline, a taxane, and trastuzumab. Limitations of Use: Patients should have disease progression on trastuzumab prior to initiation of treatment with Lapatinib tablets in combination with capecitabine. letrozole for the treatment of postmenopausal women with hormone receptor-positive metastatic breast cancer that overexpresses the HER2 receptor for whom hormonal therapy is indicated. Lapatinib tablets in combination with an aromatase inhibitor has not been compared to a trastuzumab-containing chemotherapy regimen for the treatment of metastatic breast cancer. Lapatinib tablets are a kinase inhibitor indicated in combination with: capecitabine for the treatment of patients with advanced or metastatic breast cancer whose tumors overexpress human epidermal growth factor receptor 2 (HER2) and who have received prior therapy, including an anthracycline, a taxane, and trastuzumab.
Source: US FDA prescribing information, via openFDA. Provided for general information only — it is not a substitute for your doctor's or pharmacist's advice. Always follow your prescriber's instructions.
Boxed warning. HEPATOTOXICITY Hepatotoxicity has been observed in clinical trials and postmarketing experience. The hepatotoxicity may be severe and deaths have been reported. Causality of the deaths is uncertain. WARNING: HEPATOTOXICITY See full prescribing information for complete boxed warning. Hepatotoxicity has been observed in clinical trials and postmarketing experience. Causality of the deaths is uncertain. Decreases in left ventricular ejection fraction (LVEF) have been reported. Confirm normal LVEF before starting Lapatinib and continue evaluations during treatment. Lapatinib has been associated with hepatotoxicity. Monitor liver function tests before initiation of treatment, every 4 to 6 weeks during treatment, and as clinically indicated. Discontinue and do not restart Lapatinib if patients experience severe changes in liver function tests. Dose reduction in patients with severe hepatic impairment should be considered. Diarrhea, including severe diarrhea, has been reported during treatment. Manage with antidiarrheal agents, and replace fluids and electrolytes if severe. Lapatinib has been associated with interstitial lung disease and pneumonitis. Discontinue Lapatinib if patients experience severe pulmonary symptoms. Lapatinib may prolong the QT interval in some patients. Consider electrocardiogram (ECG) and electrolyte monitoring. Severe cutaneous reactions have been reported. Discontinue Lapatinib if life-threatening reactions are suspected. Lapatinib can cause fetal harm. Advise patients of the potential risk to the fetus and to use effective contraception. Decreased Left Ventricular Ejection Fraction Lapatinib has been reported to decrease LVEF. In clinical trials, the majority (greater than 57%) of LVEF decreases occurred within the first 12 weeks of treatment; however, data on long-term exposure are limited. Caution should be taken if Lapatinib is to be administered to patients with conditions that could impair left ventricular function. LVEF should be evaluated in all patients prior to initiation of treatment with Lapatinib to ensure that the patient has a baseline LVEF that is within the institution’s normal limits. LVEF should continue to be evaluated during treatment with Lapatinib to ensure that LVEF does not decline below the institution’s normal limits. Hepatotoxicity [alanine aminotransferase (ALT) or aspartate aminotransferase (AST) greater than 3 times the upper limit of normal (ULN) and total bilirubin greater than 2 times the ULN] has been observed in clinical trials (less than 1% of patients) and postmarketing experience. Causality of the deaths is uncertain. The hepatotoxicity may occur days to several months after initiation of treatment. Abridged from the full prescribing information.
Source: US FDA prescribing information, via openFDA. Provided for general information only — it is not a substitute for your doctor's or pharmacist's advice. Always follow your prescriber's instructions.
The most common (greater than 20%) adverse reactions during treatment with Lapatinib plus capecitabine were diarrhea, palmar-plantar erythrodysesthesia, nausea, rash, vomiting, and fatigue. The most common (greater than or equal to 20%) adverse reactions during treatment with Lapatinib plus letrozole were diarrhea, rash, nausea, and fatigue. Clinical Trials Experience Because clinical trials are conducted under widely varying conditions, adverse reaction rates observed in the clinical trials of a drug cannot be directly compared to rates in the clinical trials of another drug and may not reflect the rates observed in practice. HER2-Positive Metastatic Breast Cancer: The safety of Lapatinib has been evaluated in more than 12,000 patients in clinical trials. The efficacy and safety of Lapatinib in combination with capecitabine in breast cancer was evaluated in 198 patients in a randomized, Phase 3 trial. Adverse reactions, which occurred in at least 10% of patients in either treatment arm and were higher in the combination arm, are shown in Table 1. The most common adverse reactions (greater than 20%) during therapy with Lapatinib plus capecitabine were gastrointestinal (diarrhea, nausea, and vomiting), dermatologic (palmar-plantar erythrodysesthesia and rash), and fatigue. Diarrhea was the most common adverse reaction resulting in discontinuation of study medication. The most common Grades 3 and 4 adverse reactions (NCI CTCAE v3.0) were diarrhea and palmar-plantar erythrodysesthesia. Selected laboratory abnormalities are shown in Table 2. Table 1. Adverse Reactions Occurring in Greater Than or Equal to 10% of Patients a NCI CTCAE v3.0. b Grade 3 dermatitis acneiform was reported in less than 1% of patients in the group receiving Lapatinib plus capecitabine. Lapatinib 1,250 mg/day + Capecitabine 2,000 mg/m 2 /day Capecitabine 2,500 mg/m 2 /day (N = 198) (N = 191) All Grades a Grade 3 Grade 4 Reactions % % % % % % Gastrointestinal disorders Diarrhea 65 13 1 40 10 0 Nausea 44 2 0 43 2 0 Vomiting 26 2 0 21 2 0 Stomatitis 14 0 0 11 < 1 0 Dyspepsia 11 < 1 0 3 0 0 Skin and subcutaneous tissue disorders Palmar-plantar erythrodysesthesia 53 12 0 51 14 0 Rash b 28 2 0 14 1 0 Dry skin 10 0 0 6 0 0 General disorders and administration site conditions Mucosal inflammation 15 0 0 12 2 0 Musculoskeletal and connective tissue disorders Pain in extremity 12 1 0 7 < 1 0 Back pain 11 1 0 6 < 1 0 Respiratory, thoracic, and mediastinal disorders Dyspnea 12 3 0 8 2 0 Psychiatric disorders Insomnia 10 < 1 0 6 0 0 Table 2. Abridged from the full prescribing information.
Source: US FDA prescribing information, via openFDA. Provided for general information only — it is not a substitute for your doctor's or pharmacist's advice. Always follow your prescriber's instructions.
