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Related Concept Videos

Pharmacokinetics: Drug–Food and Drug–Viral Interactions01:26

Pharmacokinetics: Drug–Food and Drug–Viral Interactions

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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...
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Drug toxicity: Drug–Drug Interaction01:30

Drug toxicity: Drug–Drug Interaction

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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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Pharmacokinetics: Drug–Drug Interactions01:25

Pharmacokinetics: Drug–Drug Interactions

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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...
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Factors Affecting Protein-Drug Binding: Drug Interactions01:23

Factors Affecting Protein-Drug Binding: Drug Interactions

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Drug interactions are a critical aspect of pharmacology and can occur when two or more drugs compete for the same binding site. This competition can result in one drug displacing another, altering the effect of the displaced drug. Drug interactions are complex processes that rely heavily on how much of the displacer drug is present and how strongly it can bind to the same sites as the displaced drug.
Displacement interactions can have varying outcomes, ranging from toxicity to virtually...
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Drug-Receptor Interactions01:29

Drug-Receptor Interactions

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Drug-receptor interaction describes the binding of receptors by drugs, but not all drug-receptor interactions result in activation and tissue response. For instance, the binding of agonists activates the receptor to generate a cellular reaction, while antagonists bind to receptors without causing their activation.
Several parameters, such as the drug's affinity for its receptor and its efficacy, which is its ability to activate the receptor, determine the drug's effect on the tissue....
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Combined Effects of Drugs: Antagonism01:30

Combined Effects of Drugs: Antagonism

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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...
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Related Experiment Video

Updated: Mar 6, 2026

A Novel Procedure for Evaluating the Reinforcing Properties of Tastants in Laboratory Rats: Operant Intraoral Self-administration
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Food and Drug Interactions.

Jong Hwan Choi1, Chang Mann Ko2

  • 1Department of Biochemistry, Yonsei University Wonju College of Medicine, Wonju, Korea.

Journal of Lifestyle Medicine
|March 7, 2017
PubMed
Summary

Natural foods and supplements can interact with medications, altering drug levels and effects. Understanding these food-drug interactions is crucial for safe and effective treatment.

Keywords:
DrugFoodPharmacodynamic interactionPharmacokinetic interaction

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Area of Science:

  • Pharmacology
  • Nutritional Science
  • Drug Metabolism

Background:

  • Growing popularity of natural foods and supplements in medicine and diet.
  • Increased risk of interactions between prescribed drugs and bioactive food ingredients.
  • Interactions can be pharmacokinetic (affecting drug levels) or pharmacodynamic (affecting drug effects).

Purpose of the Study:

  • To highlight the significance of food-drug interactions.
  • To emphasize the role of metabolism in these interactions.
  • To underscore the importance of understanding interaction outcomes.

Main Methods:

  • Review of existing literature on food-drug interactions.
  • Focus on metabolic pathways in the liver and gastrointestinal tract.
  • Analysis of pharmacokinetic and pharmacodynamic consequences.

Main Results:

  • Food-drug interactions primarily occur during drug metabolism.
  • Inhibition of metabolism can lead to increased drug blood levels.
  • Outcomes of interactions (beneficial or detrimental) depend on intensity and predictability.

Conclusions:

  • Understanding food-drug interactions is essential for patient safety.
  • Metabolism in the liver and gut plays a key role.
  • Predicting and managing these interactions is vital for therapeutic success.