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Related Concept Videos

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–Food and Drug–Viral Interactions01:26

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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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Pharmacokinetics: Drug–Drug Interactions01:25

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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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Antifungal Agents01:15

Antifungal Agents

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Amphotericin B is a broad-spectrum antifungal agent that exploits structural differences between fungal and mammalian cell membranes. Its amphipathic structure—featuring a hydrophobic polyene-lactone ring and a hydrophilic region containing mycosamine and carboxylic acid groups—enables selective binding to ergosterol, a sterol predominantly found in fungal plasma membranes. This selective interaction underlies the drug’s antifungal activity, although weak binding to...
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Combined Effects of Drugs: Synergism01:27

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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.
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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.
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Suppressive drug interactions between antifungals.

Marjon G J de Vos1, Tobias Bollenbach1

  • 1IST Austria, Am Campus 1, A-3400 Klosterneuburg, Austria.

Chemistry & Biology
|April 29, 2014
PubMed
Summary
This summary is machine-generated.

Antifungal drug interactions, specifically suppressive ones, are more common than previously thought. These interactions can manifest in various ways, impacting treatment strategies and outcomes.

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Area of Science:

  • Pharmacology
  • Mycology
  • Drug Discovery

Background:

  • Antifungal therapies are crucial for treating fungal infections.
  • Understanding drug-drug interactions is essential for optimizing treatment efficacy and safety.
  • Previous studies have not fully characterized the frequency and types of suppressive interactions among antifungal agents.

Purpose of the Study:

  • To systematically investigate drug interactions between antifungal compounds.
  • To determine the prevalence of suppressive drug interactions in antifungal combinations.
  • To explore the diverse mechanisms and implications of these interactions.

Main Methods:

  • Utilized a systematic approach to study drug interactions.
  • Analyzed combinations of various antifungal compounds.
  • Characterized different types of suppressive interactions observed.

Main Results:

  • Suppressive drug interactions between antifungal compounds occur more frequently than previously recognized.
  • Identified multiple distinct categories or 'flavors' of suppressive interactions.
  • Observed significant implications of these interactions for antifungal drug efficacy.

Conclusions:

  • The frequency of suppressive antifungal drug interactions necessitates careful consideration in clinical practice.
  • The diverse nature of these interactions suggests complex underlying mechanisms.
  • Further research into these interactions can inform the development of more effective combination antifungal therapies.