Capsule drug delivery systems
Pro Research Analysisby 
Searched over 200M research papers
Advances in Capsule Drug Delivery Systems: Materials and Design
Recent research highlights significant progress in capsule drug delivery systems, focusing on improving controlled release, targeting, and patient compliance. Traditional capsules often face challenges such as poor bioavailability, mechanical fragility, and unpredictable drug release. To address these issues, composite capsules combining synthetic and natural polymers have been developed, offering enhanced stability, encapsulation efficiency, and bioavailability. Innovations include magnetic-responsive systems for targeted therapies, pH-sensitive capsules for cancer treatment, and solid lipid nanoparticles for gene delivery. These advancements enable more precise, sustained, and site-specific drug release, which is crucial for treating chronic diseases like cancer and diabetes .
Hollow and Magnetic Capsules for Controlled and On-Demand Release
Polymeric hollow capsules are gaining attention due to their high drug-loading capacity and the ability to finely tune drug release profiles. These capsules can be fabricated using template-assisted or template-free methods and can be loaded with drugs before or after capsule formation. Drug release can be triggered by various stimuli, including temperature, pH, ultrasound, light, and enzymes, allowing for highly controlled and responsive delivery .
Magnetic-responsive capsules, such as those made from hard-magnetic elastomer foam or magnetic porous polydimethylsiloxane (PDMS), enable remote, on-demand drug release. These systems can be actuated by external magnetic fields, allowing for precise dosage control and even refilling capabilities, which extends their service life and utility in biomedical applications Sun2023Shi2016Zheng2023.
Smart and Robotic Capsules for Targeted Gastrointestinal Delivery
Ingestible smart capsules are being developed to deliver drugs precisely to specific sites within the gastrointestinal (GI) tract, which is particularly valuable for treating conditions like inflammatory bowel disease (IBD). These capsules incorporate advanced mechanical and electrical components for localization, actuation, retention, and controlled drug release. Despite challenges in miniaturization and reliable actuation, recent advancements have improved their potential for site-specific therapy and patient-centered care Hoffmann2024Munoz2014Valdivia2021.
Robotic capsules and capsule endoscopes are also being explored for targeted drug delivery in the GI tract. These devices often include anchoring mechanisms to control position and drug release mechanisms to regulate dosage and timing, overcoming the complex environment of the GI tract Munoz2014Valdivia2021.
Personalized and Multifunctional Capsule Systems
Personalized medicine is driving the development of custom-printed capsules with multifunctional layers, allowing for the delivery of multiple drugs with distinct release profiles. Techniques such as electrohydrodynamic printing and electrospinning enable the creation of capsules with concentric layers, each containing different drugs or functional components. These systems can separate and target drug release, advancing the field of multi-drug oral delivery .
Design-of-experiments (DoE) approaches are being used to optimize capsule drug delivery systems, ensuring that drug release aligns with therapeutic windows and patient needs. By analyzing and modeling release data, these methods help fine-tune capsule design for maximum efficacy and safety .
Biocompatibility, Scalability, and Future Directions
While multifunctional and composite capsules show great promise, challenges remain in terms of scalability, regulatory approval, and long-term biocompatibility. Continued research is needed to address these issues and to further integrate features such as imaging, remote control, and refillability into capsule drug delivery systems Yu2025Hoffmann2024Shi2016+1 MORE.
Conclusion
Capsule drug delivery systems are rapidly evolving, with innovations in materials, design, and actuation enabling more precise, responsive, and patient-friendly therapies. Advances in composite, hollow, magnetic, smart, and personalized capsules are paving the way for improved treatment outcomes, especially for chronic and complex diseases. Ongoing research and development will be key to overcoming current limitations and realizing the full potential of these advanced drug delivery platforms.
Sources and full results
Most relevant research papers on this topic
Multifunctional composite capsules in drug delivery systems: bridging pharmaceutical and biomedical applications
Composite drug capsules offer improved stability, encapsulation efficiency, and bioavailability, transforming personalised medicine and future healthcare solutions.
Current Advances of Hollow Capsules as Controlled Drug Delivery Systems
Hollow capsules offer potential for controlled drug delivery systems due to their ability to load high amounts of drugs and finely tune their release profiles under various stimuli conditions.
DOI
State-of-the-Art and Future Perspectives in Ingestible Remotely Controlled Smart Capsules for Drug Delivery: A GENEGUT Review.
Ingestible smart capsules show promise for precise site-specific drug delivery in the gastrointestinal tract, with recent advancements in component development and miniaturization rekindling interest in this promising technology.
DOI