Evaluation of Drug Permeation Enhancement by Using In Vitro and Ex Vivo Models

Area of Science:

• Pharmacology
• Drug Delivery Systems
• Biomedical Engineering

Background:

• Extravascular drug administration requires absorption across biological barriers, often limited by poor drug permeation or first-pass metabolism.
• Limited bioavailability is a significant challenge for many drugs administered via non-intravenous routes.
• Effective drug absorption enhancement strategies are crucial for improving therapeutic outcomes.

Purpose of the Study:

• To review the application of in vitro and ex vivo models for evaluating drug permeation enhancement strategies.
• To discuss the efficacy of various absorption enhancement techniques across different extravascular routes.
• To highlight the importance of physiologically relevant models in drug development.

Main Methods:

• Literature review of studies employing in vitro cell culture and ex vivo tissue models.
• Analysis of drug permeation enhancement strategies for nasal, oromucosal, pulmonary, oral, rectal, and transdermal administration.
• Evaluation of model systems for quantifying drug absorption and bioavailability.

Main Results:

• In vitro and ex vivo models provide valuable insights into drug permeation across biological barriers.
• Various strategies, including chemical enhancers and specialized dosage forms, can improve drug bioavailability.
• The selection of appropriate models is critical for accurately assessing enhancement strategy efficacy.

Conclusions:

• In vitro and ex vivo models are essential tools for evaluating drug absorption enhancement strategies.
• These models aid in overcoming bioavailability limitations for extravascular drug delivery.
• Further development and validation of these models will advance drug delivery research.