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関連する概念動画

Combined Effects of Drugs: Antagonism01:30

Combined Effects of Drugs: Antagonism

The combined effects of drugs can result in various interactions, of which an important type is antagonism. Antagonism is a mechanism where one drug inhibits or counteracts the effects of another drug. Antagonism can occur through various means, including receptor binding, allosteric modulation, functional interaction, chemical reactions, and pharmacokinetic processes.
The most common type is receptor antagonism, where one drug acts as an antagonist to block the effects of another drug by...
Combined Effects of Drugs: Synergism01:27

Combined Effects of Drugs: Synergism

Synergism is a useful mechanism where combining two or more drugs is more effective than each constituent used alone. Such combinations are also called supra-additive interactions. The drugs collectively enhance the final therapeutic effect by acting on different targets. Another advantage is that the low dose of each constituent drug is sufficient to achieve the desired effect. This helps reduce the duration of therapy and lower the adverse effects of these drugs.
Such synergistic combinations...
Agonism and Antagonism: Quantification01:14

Agonism and Antagonism: Quantification

When drugs are administered, they can elicit either an agonist or antagonist effect on the body. Agonism occurs when a drug activates a specific receptor, triggering a biological response. On the other hand, antagonism happens when a drug binds to the same receptors but blocks their activation, thereby preventing a biological response.
To quantify these effects, researchers use a dose-response curve, which provides valuable information about the potency and efficacy of a drug. Potency refers to...
Pharmacokinetics: Drug–Drug Interactions01:25

Pharmacokinetics: Drug–Drug Interactions

Drug interactions occur when the pharmacological effect of one drug is altered by another substance, either enhancing or diminishing its activity. The drug whose activity is altered is known as the object drug, and the substance causing the alteration is called the agent drug or the precipitant. The net effects of these interactions are mostly undesirable, leading to decreased effectiveness or increased adverse effects. In rare cases, interactions can be beneficial, such as the enhanced...
Pharmacokinetics: Drug–Food and Drug–Viral Interactions01:26

Pharmacokinetics: Drug–Food and Drug–Viral Interactions

A drug interaction occurs when the concurrent use of another drug, food, or an external substance alters the pharmacological activity of a drug. This interaction can modify the action of the original drug, affecting its effectiveness and safety.Drug–food interactions are significant as they impact drug absorption, metabolism, and excretion. For example, grapefruit juice is a well-known disruptor of drug metabolism. It inhibits the cytochrome P450 3A4 enzyme, crucial for the metabolism of many...
Drug toxicity: Drug–Drug Interaction01:30

Drug toxicity: Drug–Drug Interaction

Drug–drug interactions can precipitate toxicity through multiple mechanisms. Absorption interactions alter how drugs enter the body, exemplified when ranitidine increases the absorption of basic drugs, while cholestyramine decreases the levels of propranolol. Protein binding interactions occur when drugs share the same binding sites on plasma proteins. Drugs like aspirin and warfarin, when bound in excess, can lead to increased free drug concentrations, enhancing the potential for...

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関連する実験動画

Updated: Jul 15, 2026

High-throughput Identification of Synergistic Drug Combinations by the Overlap2 Method
07:51

High-throughput Identification of Synergistic Drug Combinations by the Overlap2 Method

Published on: May 21, 2018

ハーブ・ドラッグの相互作用

A Fugh-Berman1

  • 1George Washington University School of Medicine and Health Sciences, Department of Health Care Sciences, Washington, DC 20037, USA. fughberman@aol.com

Lancet (London, England)
|February 16, 2000
PubMed
まとめ

薬草と医薬品を同時に使用すると,危険な相互作用が生じることがあります. 医療従事者は,潜在的な副作用のために,薬草と薬物の混合を避けるように患者に助言する必要があります.

科学分野:

  • 薬理学 薬理学とは
  • 統合医療とは一体化医療です.
  • 薬草薬は,薬草薬として用いられる.

背景:

  • 薬草製品と医薬品の同時使用は一般的です.
  • 薬草は,薬剤と相互作用し,薬剤の有効性と安全性を変化させることがあります.
  • これらのハーブ・ドラッグの相互作用を理解することは,患者のケアにとって極めて重要です.

研究 の 目的:

  • ハーブ・ドラッグの相互作用に関する文書化された症例をレビューし,要約する.
  • 薬草と医薬品を組み合わせることで生じる潜在的な有害効果を強調する.
  • ハーブ薬の使用に関する臨床的意識と患者カウンセリングの重要性を強調する.

主な方法:

  • 報告されたハーブ・ドラッグの相互作用に関する文献レビュー.
  • 特定のハーブとその相互作用する薬剤の識別.
  • 臨床的結果に基づく相互作用の分類 (例えば,出血,セロトニン症候群,生物学的利用性の変化).

主要な成果:

  • ウォルファリンとジンコ,ニンニク,ドンクワイ,ダンシェンの併用は出血のリスクを高める可能性があります.
  • セントジョンズワートは,SSRIと共に軽度のセロトニン症候群を引き起こし,ディゴキシン,セオフィリン,サイクロスポリン,フェンプロキュモンの生物利用性を低下させる可能性があります.

さらに関連する動画

Diagonal Method to Measure Synergy Among Any Number of Drugs
12:08

Diagonal Method to Measure Synergy Among Any Number of Drugs

Published on: June 21, 2018

Quadruple-Checkerboard: A Modification of the Three-Dimensional Checkerboard for Studying Drug Combinations
11:15

Quadruple-Checkerboard: A Modification of the Three-Dimensional Checkerboard for Studying Drug Combinations

Published on: July 24, 2021

関連する実験動画

Last Updated: Jul 15, 2026

High-throughput Identification of Synergistic Drug Combinations by the Overlap2 Method
07:51

High-throughput Identification of Synergistic Drug Combinations by the Overlap2 Method

Published on: May 21, 2018

Diagonal Method to Measure Synergy Among Any Number of Drugs
12:08

Diagonal Method to Measure Synergy Among Any Number of Drugs

Published on: June 21, 2018

Quadruple-Checkerboard: A Modification of the Three-Dimensional Checkerboard for Studying Drug Combinations
11:15

Quadruple-Checkerboard: A Modification of the Three-Dimensional Checkerboard for Studying Drug Combinations

Published on: July 24, 2021

  • パナックス・ジンセン (Panax ginseng) は,抗うつ剤を服用している患者でマニアを誘発する可能性があります;ベテルナッツは,神経麻痺薬でエクストラピラミッド効果を悪化させる可能性があります.
  • ヨヒンビンは,三環抗うつ剤で高血圧のリスクを増やす可能性があります;甘草はコルチコステロイドを強化します.
  • 特定の中国とアーユルヴェーダの薬剤は,特定の薬剤の血中濃度を低下させる可能性があります.

    • 結論:

    • ハーブ薬の相互作用は,薬剤の有効性の変化から重度の有害事象まで,重大なリスクを伴います.
    • 報告された多くの相互作用には詳細な分析が欠け,慎重に解釈する必要がある.
    • 医療従事者は,処方箋または非処方箋の医薬品とハーブ製品を組み合わせる潜在的な危険性について,積極的に患者に助言しなければなりません.