甲状腺機能低下症における空腹時投与および非空腹時(用量調整)レボチロキシン投与の比較:ランダム化比較試験
Jeresa I A Willems1, Daan J L van Twist1, Floris Helmich2
1Department of Internal Medicine, Zuyd Thyroid Center, Zuyderland Medical Center, Sittard/Heerlen, the Netherlands.
The Journal of clinical endocrinology and metabolism
|December 23, 2025
まとめ
15%の用量増加を伴う朝食時のレボチロキシン(LT4)投与は、甲状腺刺激ホルモン(TSH)の安定性を維持し、患者のQOLを改善しました。この患者中心のアプローチは、空腹時のLT4投与に代わる実行可能な選択肢となります。
科学分野:
- 内分泌学
- 甲状腺疾患
- 薬物動態学
背景:
- レボチロキシン(LT4)は、吸収を最大化するために通常、空腹時に服用されます。
- 空腹時投与は不便であり、治療への患者のアドヒアランスを低下させる可能性があります。
- 患者の嗜好に関する研究では、空腹時LT4投与に対する強い希望が示されています。
研究 の 目的:
- 15%の用量調整を伴う非空腹時LT4投与が甲状腺刺激ホルモン(TSH)の安定性を維持する上での有効性を評価すること。
- 朝食時にLT4を服用する患者と空腹時に服用する患者の間でTSH安定性を比較すること。
- 両研究グループにおける患者のQOLと治療選択を評価すること。
主な方法:
- 十分に管理された甲状腺機能低下症の成人を対象としたランダム化比較試験。
- 参加者は、空腹時LT4投与または用量調整された朝食時LT4投与のいずれかに割り当てられました。
- TSH安定性を達成するために、甲状腺ホルモンレベル(TSH、FT4、TT3)を監視し、必要に応じて用量を調整しました。
主要な成果:
- TSH安定性は、空腹時(74.4%)および朝食時(73.3%)グループで同等でした。LT4を朝食時に服用した患者は、QOLの改善と非空腹時投与に対する有意に強い好みを報告しました(76.2%)。患者の88.9%が高率で、研究後も非空腹時LT4投与の継続を選択しました。
結論:
- 15%の用量増加を伴う朝食時のレボチロキシン投与は、TSH安定性を効果的に維持します。
- この非空腹時アプローチは、患者のQOLとアドヒアランスを向上させ、患者の好みに沿ったものです。
- 非空腹時LT4投与は、従来の空腹時投与に代わる実用的で患者中心の選択肢となります。
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