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Tamoxifen and the risk of Parkinsonism: a case/non-case study.
European Journal of Clinical Pharmacology 2018 September
BACKGROUND: Three studies have suggested a potential positive association between the use of tamoxifen in breast cancer and Parkinsonism, mainly after long-term exposure.
OBJECTIVES: 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.
METHODS: 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.
RESULTS: 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).
CONCLUSION: This study did not find evidence for Parkinsonism associated with tamoxifen.
OBJECTIVES: 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.
METHODS: 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.
RESULTS: 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).
CONCLUSION: This study did not find evidence for Parkinsonism associated with tamoxifen.
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