Tamoxifen and the risk of Parkinsonism: a case/non-case study (original) (raw)

European journal of clinical pharmacology, 2018

Abstract

Three studies have suggested a potential positive association between the use of tamoxifen in breast cancer and Parkinsonism, mainly after long-term exposure. To explore this potential signal, we performed a case/non-case study using the World Health Organization Global Individual Case Safety Reports (ICSRs) database, VigiBase® between 1979 and 2018. Among women ≥ 55 years, we measured the risk of reporting "Parkinsonism" compared with all other adverse drug reactions [as a reporting odds ratio (ROR 95% CI)] for tamoxifen compared to all other drugs or aromatase inhibitors. During the study period, 356 ICSRs of Parkinsonism reported with tamoxifen were identified. We failed to find a positive association between tamoxifen exposure and Parkinsonism in comparison with exposure to other drugs (ROR = 0.79; 95% CI 0.71-0.88) or aromatase inhibitors (ROR = 0.39; 95% CI 0.33-0.46). This study did not find evidence for Parkinsonism associated with tamoxifen.

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