Abstract
Transdermal fentanyl is widely administered as an analgesic therapy for cancer patients. Recently, a novel fentanyl citrate transdermal patch was developed in Japan, which is the first such patch that requires changing only once a day. The patch releases more stable serum fentanyl concentrations and results in less frequent adverse skin symptoms compared with the conventional 72-h transdermal fentanyl patch. A previous study has reported the short-term analgesic effects and safety of this transdermal patch. However, the long-term efficacy has yet to be determined. Therefore, the present study retrospectively investigated the adverse effects and outcomes of treatment with this product in 46 lung cancer patients. In total, 35 (76%) patients were able to continue the treatment until the end of the observation period, including 32 (69%) who succumbed to the disease and three (7%) who were transferred from Nagoya City University Hospital to a hospice. Of the 11 (24%) discontinued cases, six were changed to a course of injectable opioids for the palliation of terminal symptoms, including dyspnea. Adverse effects were observed in 11 (24%) cases, but discontinuation due to adverse effects occurred in only four cases. Therefore, the present study indicates that palliative treatment with the once-a-day fentanyl citrate transdermal patch is well-tolerated by lung cancer patients.
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