Comparison of clinical pharmacology of voriconazole and posaconazole

Beata M Sienkiewicz1, Łukasz Łapiński1, Anna Wiela-Hojeńska1

  • 1Wroclaw Medical University, Wroclaw, Poland.

Contemporary Oncology (Poznan, Poland)
|April 5, 2017
PubMed

Insights

Voriconazole and posaconazole are effective antifungal drugs, but differ in usage, absorption, metabolism, side effects, and interactions. Understanding their clinical pharmacology optimizes treatment for invasive fungal infections in all patients.

Area of Science:

  • Medical Mycology
  • Clinical Pharmacology
  • Infectious Diseases

Background:

  • Fungal infections pose a significant clinical challenge, particularly in immunocompromised and hematologic patients.
  • The increasing prevalence necessitates the development of new antifungal agents and optimization of existing therapies.
  • Voriconazole and posaconazole represent advanced broad-spectrum triazole antifungals.

Purpose of the Study:

  • To compare the clinical pharmacology of voriconazole and posaconazole.
  • To detail their therapeutic indications, contraindications, and pharmacokinetic profiles.
  • To provide insights for optimizing antifungal pharmacotherapy.

Main Methods:

  • Comparative analysis of clinical pharmacology data for voriconazole and posaconazole.
  • Review of therapeutic indications, adverse drug reactions, drug-drug interactions, and dosage regimens.
  • Literature synthesis on factors influencing pharmacotherapy.

Main Results:

  • Voriconazole and posaconazole exhibit distinct profiles in absorption, metabolism, adverse effects, and drug interactions.
  • Specific indications vary, with voriconazole used for Scedosporium and posaconazole for coccidioidomycosis and chromoblastomycosis.
  • Both agents are crucial for treating invasive aspergillosis and Candida infections.

Conclusions:

  • Detailed knowledge of voriconazole and posaconazole clinical pharmacology is essential for effective treatment of invasive fungal infections.
  • Understanding drug-specific differences allows for optimized pharmacotherapy selection and management.
  • This comparative analysis aids clinicians in treating diverse fungal infections in adult and pediatric populations.

Related Concept Videos

Pharmacokinetics: Overview01:10

Pharmacokinetics: Overview

Pharmacokinetics is a scientific discipline that focuses on the journey of a drug within the body, encompassing four key stages: absorption, distribution, metabolism, and elimination. The first stage, absorption, involves the drug's transfer into the bloodstream. Several factors dictate the extent and speed of this process. For example, the liver often metabolizes oral drugs before they reach systemic circulation, leading to only partial absorption. In contrast, intravenous (IV) administration...
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...
Pharmacodynamics: Overview and Principles01:21

Pharmacodynamics: Overview and Principles

Pharmacodynamics is a scientific field that delves into drugs' intricate biochemical, cellular, and physiological effects on the human body. The study of pharmacodynamics helps us understand how drugs interact with the body and elicit various responses.
Most drugs' effects result from their interactions with drug receptors or targets within the body. These interactions trigger specific responses at the cellular or systemic level. Drug receptors can be found on the surfaces of cells or within...
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...
Pharmacokinetic–Pharmacodynamic Relationship: Dose to Pharmacological Effect01:28

Pharmacokinetic–Pharmacodynamic Relationship: Dose to Pharmacological Effect

A drug’s dosage and pharmacokinetic properties determine how quickly it acts, how intense its effects are, and how long it lasts. Higher doses increase drug concentration at receptor sites, producing a hyperbolic curve when pharmacologic response is plotted against drug dose. Converting this scale to a log-linear format results in a sigmoidal curve, better representing dose–response relationships.For drugs following a one-compartment model, the pharmacologic response is directly proportional to...
Antifungal Agents01:15

Antifungal Agents

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 cholesterol contributes to...