慢性腎臓病患者の脳病とバクロフェンの関連
Flory T Muanda1,2, Matthew A Weir1,2,3, Lavanya Bathini1,3
1Institute for Clinical Evaluative Sciences, London, Ontario, Canada.
JAMA
|November 10, 2019
まとめ
高用量のバクロフェンは慢性腎臓病 (CKD) の高齢者の脳病のリスクを高めます. この研究では,バクロフェンの投与量は,より低い投与量と比較して,20 mg/ 日またはそれ以上であったと,脳病変の発生率が著しく高かった.
科学分野:
- 腎臓科
- 神経学
- 臨床薬理学
背景:
- バクロフェンは,慢性腎臓病 (CKD) の患者の脳症に関連した筋肉リラックス剤です.
- 過去の報告では,バクロフェンをCKD患者で脳病と関連付ける少なくとも30件の症例が示されています.
研究 の 目的:
- 新規に処方されたバクロフェンの高用量 (≥20 mg/ 日) と低用量 (< 20 mg/ 日) のCKD患者における30日間の脳病変のリスクを比較する.
- バクロフェン使用者と非使用者の脳病のリスクを比較する.
主な方法:
- カナダのオンタリオ州 (2007年−2018年) で,リンクされた医療データを用いた人口ベースコホート研究.
- CKD (eGFR < 60 mL/ min/ 1. 73 m2,透析を受けていない) の高齢者15,942人を含む.
- 結果を分析するために,治療加重の逆確率と修正されたポアソン回帰を用いた.
主要な成果:
- バクロフェンを1日20mg以上投与した患者は,1日20mg未満の患者と比較して3. 54倍も脳病入院のリスクが高かった (1. 11%対0. 42%).
- EGFR値が低下するにつれて,脳病変のリスクは徐々に増加した.
- バクロフェンの使用者は,使用しない人と比較して,脳病のリスクが著しく高かった (RRは,≥20 mg/ 日で19. 8).
結論:
- バクロフェンの高用量は,高齢のCKD患者の30日間の脳病変の発生率の増加と関連しています.
- この結果は,バクロフェンの治療効果と比較して,投与量に依存するリスクを示唆しています.
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