Patients with non-small cell lung cancer (NSCLC) typically receive platinum-based combination chemotherapy. In spite of improvements in symptoms and survival, response rates remain low and newer agents are being investigated. The newer agents may offer increased efficacy and reduced toxicity compared with established agents and regimens. The topoisomerase-I inhibitor, topotecan, achieves single-agent response rates of 4-25% in NSCLC. Topotecan has also been studied in combinations: a combination of topotecan, administered using the standard 5-day schedule, with cisplatin was effective but was associated with myelosuppression. The combination of topotecan plus carboplatin may be better tolerated and warrants further investigation. Topotecan was also combined with newer agents (gemcitabine, vinorelbine, docetaxel, paclitaxel) using a range of different administration schedules of topotecan. Response rates of up to 30% were achieved. A weekly schedule of topotecan was effective and well tolerated and was also convenient for healthcare professionals and patients.
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