Oral pulsatile delivery: rationale and chronopharmaceutical formulations

Area of Science:

• Pharmaceutical Sciences
• Drug Delivery Systems
• Chronopharmacology

Background:

• Oral pulsatile/delayed release systems are crucial for chronotherapy, addressing diseases with predictable symptom patterns like asthma and cardiovascular conditions.
• These systems are designed for programmable lag phases, enabling timed drug release to match circadian rhythms and improve therapeutic outcomes.
• The suitability for chronotherapeutic goals has increased interest in these advanced drug delivery platforms.

Purpose of the Study:

• To review the rationale and formulation strategies for oral pulsatile/delayed release dosage forms.
• To highlight the application of these systems in treating chronopathologies with specific symptom timing.
• To discuss the potential for achieving time-based colonic release through adapted pulsatile delivery systems.

Main Methods:

• Review of existing literature on oral pulsatile and delayed-release drug delivery systems.
• Analysis of formulation strategies including reservoir, capsular, and osmotic devices.
• Discussion of methods to achieve programmable lag phases and control drug release profiles.

Main Results:

• Oral pulsatile/delayed delivery systems can be engineered to provide programmable lag phases before drug release.
• These systems are suitable for achieving chronotherapeutic effects, particularly for conditions with early morning symptom exacerbation.
• Adaptation of pulsatile systems can enable predictable, time-based colonic drug release, overcoming gastric emptying variability.

Conclusions:

• Oral pulsatile/delayed delivery systems offer a promising approach for targeted drug delivery in chronopharmacology.
• Formulation strategies are key to optimizing lag phases and release kinetics for effective chronotherapy.
• These advanced dosage forms hold significant potential for managing chronic diseases with circadian-related symptom patterns.