PCSK9 저해제와 인지 기능 관련 이상사례: 세계보건복지기구 데이터베이스 VigiBase를 활용한 약물감시 연구

초록

Protein convertase subtilisin/kexin type 9 (PCSK9) inhibitors are novel lipid-lowering agents used in patients with cardiovascular diseases. Despite reassuring safety data from pivotal trials, increasing evidence from realworld studies suggests that PCSK9 inhibitors may increase the risk for cognitive dysfunction. This study aimed to identify signals of cognitive dysfunction-related adverse events (AEs) associated with PCSK9 inhibitors. We performed an observational pharmacovigilance study using the World Health Organization (WHO) VigiBase data up to December 2022. We included individual case safety reports (ICSRs) of the PCSK9 inhibitors alirocumab and evolocumab and compared them with those of other drugs. As the primary outcome, cognitive dysfunction was defined using the Medical Dictionary for Regulatory Activities (MedDRA) system’s High Level Group Term (HLGT) ‘Cognitive and attention disorders and disturbances’ and ‘Mental impairment disorders’ The secondary outcomes indicated specific classifications of cognitive dysfunction-related AEs. Among 114,293 reports (258,099 drug-AE pairs) on PCSK9 inhibitors, 8464 (31,951 drug-AE pairs) were identified as cognitive dysfunction-related AEs. Among the ICSRs, 54% included female patients, 41% persons aged 65 years, and the majority (82%) were for those who received evolocumab. The study revealed a significant disproportionality for cognitive dysfunction with PCSK9 inhibitors(ROR 1.70, 95% CI 1.63-1.77). Specifically, significant signals were identified for cognitive disorder (ROR 1.47, 95% CI 1.28-1.69), memory impairment (ROR 2.72, 95% CI 2.56-2.88), and amnesia(ROR 1.50, 95% CI 1.36-1.65). This pharmacovigilance study identified an increased reporting of cognitive dysfunction associated with the use of PCSK9 inhibitors, particularly emphasizing caution regarding ‘memory abnormalities’ in elderly patients receiving PCSK9 inhibitors. Our findings support the need for the systematic surveillance of cognitive dysfunctions among PCSK9 inhibitor users.

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