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JOURNAL ARTICLE
META-ANALYSIS
SYSTEMATIC REVIEW
Safety of treatment with chloroquine and hydroxychloroquine: A ten-year systematic review and meta-analysis.
European Journal of Internal Medicine 2021 June
OBJECTIVE: To estimate the incidence rate ratio (IRR) of adverse events (AE) in chloroquine or hydroxychloroquine users.
METHODS: We systematically reviewed randomized controlled trials (RCTs), using MEDLINE (2010-2020) and EMBASE (2010-2020) databases, reporting AE in chloroquine or hydroxychloroquine users during treatment for lupus, rheumatoid arthritis, malaria and COVID-19. The protocol for this systematic review is registered at the PROSPERO database (CRD42020197938). The quality of the included studies was assessed using the Cochrane risk-of-Bias tool and relevant data were extracted though a customized data collection form, independently, by two authors. The IRR of AE was estimated using a random-effect model meta-analysis and heterogeneity was evaluated by T2 and I2 . Subgroup analysis was performed, and publication bias was assessed by funnel-plot.
RESULTS: Forty-six RCTs met our eligibility criteria and were included in our analysis (23132 patients). There was not a single death attributed to chloroquine or hydroxychloroquine use in the included RCTs. The IRR of general AE during antimalarial use was 1.15 [CI 95% 1.01-1.31]. COVID-19 patients treated with either antimalarial presented an 83% and 165% higher risk of developing general and gastrointestinal AE, respectively, in comparison with controls. The use of antimalarial increased the risk of developing dermatological AE by 92% in malarial studies and reduced by 65% in lupus studies. We did not find a significatively higher risk of cardiovascular nor ophthalmological AE in antimalarial users.
CONCLUSIONS: Our data reinforces that chloroquine and hydroxychloroquine have a good safety profile though caution is advised when using higher than usual doses in hospitalized COVID-19 patients.
METHODS: We systematically reviewed randomized controlled trials (RCTs), using MEDLINE (2010-2020) and EMBASE (2010-2020) databases, reporting AE in chloroquine or hydroxychloroquine users during treatment for lupus, rheumatoid arthritis, malaria and COVID-19. The protocol for this systematic review is registered at the PROSPERO database (CRD42020197938). The quality of the included studies was assessed using the Cochrane risk-of-Bias tool and relevant data were extracted though a customized data collection form, independently, by two authors. The IRR of AE was estimated using a random-effect model meta-analysis and heterogeneity was evaluated by T2 and I2 . Subgroup analysis was performed, and publication bias was assessed by funnel-plot.
RESULTS: Forty-six RCTs met our eligibility criteria and were included in our analysis (23132 patients). There was not a single death attributed to chloroquine or hydroxychloroquine use in the included RCTs. The IRR of general AE during antimalarial use was 1.15 [CI 95% 1.01-1.31]. COVID-19 patients treated with either antimalarial presented an 83% and 165% higher risk of developing general and gastrointestinal AE, respectively, in comparison with controls. The use of antimalarial increased the risk of developing dermatological AE by 92% in malarial studies and reduced by 65% in lupus studies. We did not find a significatively higher risk of cardiovascular nor ophthalmological AE in antimalarial users.
CONCLUSIONS: Our data reinforces that chloroquine and hydroxychloroquine have a good safety profile though caution is advised when using higher than usual doses in hospitalized COVID-19 patients.
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