Development of In Vitro Dissolution Testing Methods to Simulate Fed Conditions for Immediate Release Solid Oral...

Area of Science:

• Pharmacokinetics and Drug Delivery
• Gastrointestinal Physiology
• Pharmaceutical Sciences

Background:

• In vitro dissolution testing is crucial for predicting oral drug product performance in the gastrointestinal (GI) tract.
• Simulating in vivo conditions, especially under fasted and fed states, is essential for accurate predictions.
• Immediate release (IR) solid oral dosage forms are the primary focus for these dissolution studies.

Purpose of the Study:

• To review current in vitro dissolution methodologies for simulating and predicting in vivo drug dissolution under fasted and fed conditions.
• To assess biorelevant systems and physiologically based pharmacokinetic (PBPK) modeling approaches.
• To identify knowledge gaps and facilitate the development of improved in vitro dissolution methods.

Main Methods:

• Literature review of in vitro dissolution testing methodologies and biorelevant models.
• Summary of human GI physiological conditions under fasted and fed states.
• Assessment of PBPK modeling in evaluating food effects on drug bioavailability and bioequivalence.

Main Results:

• Dissolution media, mechanical forces, and transit times are key parameters for simulating postprandial conditions.
• Various biorelevant systems (FSM, GastroDuo, DGM, TIM, HGS) exist but often lack full physiological replication.
• Translatability of in vitro data to in vivo systems remains a significant challenge.

Conclusions:

• While biorelevant models enhance physiological relevance, challenges in full replication and in vitro-in vivo correlation persist.
• PBPK modeling offers a complementary approach to assess food effects on drug performance.
• Further development of in vitro dissolution methods is needed to accurately predict in vivo drug performance under fasted and fed states, potentially harmonizing regulatory studies.