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Gefitinib

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Abstract

  • ▴ Gefitinib (ZD1839) is an orally active selective inhibitor of epidermal growth factor receptor tyrosine kinase, an enzyme that regulates intracellular signalling pathways implicated in the proliferation and survival of cancer cells.

  • ▴ In human non-small cell lung cancer (NSCLC) cell lines and xenografts, gefitinib dose-dependently inhibited cellular proliferation and tumour growth, and potentiated the cytotoxic effects of chemotherapy and/or radiation.

  • ▴ Gefitinib is orally bioavailable and is cleared via the cytochrome P450 3A4 pathway. In patients receiving gefitinib (50 to 700 mg/day) in phase I trials, steady-state plasma concentration was reached in 7 to 10 days.

  • ▴ In patients with advanced NSCLC who had failed one or two prior chemotherapies, gefitinib 250 or 500mg once daily induced an objective response in ≈19% of patients in a double-blind trial (n = 210).

  • ▴ In another double-blind trial including 216 patients with NSCLC who had failed two or more prior chemotherapies, gefitinib 250 or 500mg once daily induced an objective response in 11.8 and 8.8% of patients, respectively; ≈40% showed an improvement in disease-related symptoms.

  • ▴ Gefitinib was generally well tolerated and the most common adverse events were mild skin rashes and diarrhoea.

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  1. Iressa™

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  1. Adis International Limited, 41 Centorian Drive, Private Bag 65901, Mairangi Bay, Auckland, New Zealand

    Christine R. Culy & Diana Faulds

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  1. Christine R. Culy
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  2. Diana Faulds
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Correspondence to Christine R. Culy.

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Culy, C.R., Faulds, D. Gefitinib. Drugs 62, 2237–2248 (2002). https://doi.org/10.2165/00003495-200262150-00008

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  • DOI: https://doi.org/10.2165/00003495-200262150-00008

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