Which psychotropic medications have clinically significant grapefruit interactions?

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Last updated: October 13, 2026 • View editorial policy

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身心科用藥與葡萄柚的交互作用

經由CYP3A4代謝的身心科藥物應完全避免葡萄柚汁,因為葡萄柚會抑制腸道CYP3A4酶,導致藥物血中濃度顯著升高,增加毒性風險。

主要有交互作用的身心科藥物類別

苯二氮平類(Benzodiazepines)

  • Midazolam 和 Triazolam 與葡萄柚汁有明確的臨床顯著交互作用 1
  • 葡萄柚汁使口服midazolam的生物利用度從24%增加至35%,血中濃度峰值增加56%,AUC增加52% 1
  • 這會導致鎮靜效果延長和加強,在老年人、肝硬化患者中風險更高 1

三環抗憂鬱劑(Tricyclic Antidepressants)

  • Clomipramine 與葡萄柚汁併用後,血中濃度平均增加4.5%,其代謝物增加10.5% 2
  • Amitriptyline 在研究中未顯示顯著交互作用 2
  • 由於三環抗憂鬱劑治療窗狹窄,即使中等程度的血中濃度增加也可能導致心律不整等嚴重副作用

其他身心科藥物

根據CYP3A4代謝途徑,以下藥物理論上有交互作用風險 3, 4:

  • 抗焦慮藥物: 部分經CYP3A4代謝的藥物
  • 情緒穩定劑: 某些經CYP3A4代謝的藥物
  • 抗精神病藥物: 部分經CYP3A4代謝的藥物
  • 促認知藥物: 某些經CYP3A4代謝的藥物

交互作用機轉

葡萄柚汁含有的生物類黃酮(特別是naringenin)會:

  1. 抑制腸道CYP3A4酶 - 這是最主要的機轉 3, 4
  2. 抑制CYP1A2酶 4, 2
  3. 影響P-glycoprotein(P-gp)藥物轉運蛋白 4
  4. 影響OATP(有機陰離子轉運多肽) 4

這種抑制效果:

  • 個體差異大
  • 效果持續時間長
  • 即使不同時服用也會產生影響 5

臨床建議

絕對禁忌

服用以下藥物的患者應完全避免葡萄柚及葡萄柚汁 5:

  • Midazolam(口服)
  • Triazolam
  • 任何經CYP3A4大量代謝的身心科藥物

實務操作

  1. 不要只是避免同時服用 - 葡萄柚的抑制效果可持續數小時至數天,因此治療期間應完全避免 5
  2. 其他柑橘類果汁 - 可能也含有類似的抑制成分,建議謹慎使用 5
  3. 患者衛教 - 必須明確告知患者此交互作用的風險 4

高風險族群特別注意

以下患者風險更高,需特別警覺 1:

  • 老年人
  • 肝硬化患者
  • 同時使用其他CYP3A4抑制劑的患者

重要警示

雖然某些研究顯示部分藥物(如amitriptyline)與葡萄柚汁的交互作用不明顯 2,但由於:

  • 個體差異大
  • 身心科藥物常有狹窄的治療窗
  • 可能導致嚴重副作用(如心律不整、過度鎮靜)

臨床實務上應採取保守態度,建議所有服用經CYP3A4代謝身心科藥物的患者完全避免葡萄柚汁 3, 4。

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