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Related Concept Videos

Pharmacokinetics: Drug–Drug Interactions01:25

Pharmacokinetics: Drug–Drug Interactions

462
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...
462
Bioequivalence of Drugs: Drugs with Multiple Indications01:09

Bioequivalence of Drugs: Drugs with Multiple Indications

165
The concept of therapeutic equivalence (TE) in drugs with multiple indications is complex. A generic drug may be therapeutically equivalent to a brand-name product for one specific indication, but this doesn't necessarily mean it's equivalent for all other indications. Evidence of TE in one patient group and bioequivalence shown in healthy volunteers can support—but not confirm—TE for other indications. However, definitive proof requires individual clinical studies for each...
165
FDA Approved Drugs: Changes to Approved Drugs01:26

FDA Approved Drugs: Changes to Approved Drugs

275
Post-approval, manufacturers may modify an approved new or generic drug product. Such modifications can encompass alterations in the Active Pharmaceutical Ingredient (API), manufacturing process, formulation, batch size, manufacturing site, and container closure system (FDA Guidance for Industry, April 2004). Often, a drug product may undergo multiple changes.These modifications require careful evaluation to determine their potential impact on the drug product's identity, strength, quality,...
275
Pharmacokinetics: Drug–Food and Drug–Viral Interactions01:26

Pharmacokinetics: Drug–Food and Drug–Viral Interactions

262
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...
262
Factors Influencing Drug Absorption: Drug Dissolution01:27

Factors Influencing Drug Absorption: Drug Dissolution

1.2K
The pharmacokinetic journey of drugs from solid oral dosage forms into systemic circulation is multifaceted. It begins with disintegration, a prerequisite ensuring a solid dosage form's subdivision into minute particles. Dissolution occurs next as these granulated entities solubilize in gastrointestinal fluids. This solubilization is crucial for the succeeding stage, permeation, which describes the traversal of the drug across the intestinal membrane and its subsequent entry into the blood...
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Factors Affecting Protein-Drug Binding: Drug-Related Factors01:18

Factors Affecting Protein-Drug Binding: Drug-Related Factors

492
Drug binding to proteins is a complex phenomenon influenced by various drug-related factors, each playing a significant role in the interaction between drugs and proteins within the body.
One crucial factor in drug-protein binding is the drug's lipophilicity or its affinity for fat. More lipophilic drugs tend to have higher binding extents. For example, highly lipophilic drugs like cloxacillin exhibit substantial protein binding, with as much as 95% of the drug binding to proteins. In...
492

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Related Experiment Video

Updated: Feb 11, 2026

A Computerized Test Battery to Study Pharmacodynamic Effects on the Central Nervous System of Cholinergic Drugs in Early Phase Drug Development
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[Drug eruption].

Ali Tareen1, Anette Bygum

  • 1dr.alitareen@gmail.com.

Ugeskrift for Laeger
|April 26, 2018
PubMed
Summary

Drug eruptions are skin reactions caused by medications, often appearing as a rash. Accurate diagnosis relies on medical history and assessment to identify potential adverse cutaneous reactions.

Area of Science:

  • Dermatology
  • Pharmacology

Background:

  • Drug eruption is an adverse cutaneous reaction to medication.
  • Morbilliform exanthema is the most common presentation, but clinical signs vary.
  • Prevalence in Western hospitals is 2-3%.

Purpose of the Study:

  • To define drug eruption.
  • To highlight diagnostic methods.
  • To emphasize the importance of identification for healthcare professionals.

Main Methods:

  • Clinical diagnosis.
  • Thorough medical history.
  • Patient assessment for risk stratification.

Main Results:

  • Drug eruptions have diverse clinical presentations.

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Related Experiment Videos

Last Updated: Feb 11, 2026

A Computerized Test Battery to Study Pharmacodynamic Effects on the Central Nervous System of Cholinergic Drugs in Early Phase Drug Development
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Published on: February 11, 2019

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Drug Repurposing Hypothesis Generation Using the "RE:fine Drugs" System
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  • Diagnosis is primarily clinical.
  • Risk stratification is crucial.

    • Conclusions:

    • Understanding drug eruptions is vital for healthcare providers.
    • Clinical assessment is key to diagnosis.
    • Early identification aids in managing adverse drug reactions.