AAPS PharmSciTech

, Volume 19, Issue 5, pp 2322–2329 | Cite as

A Novel Colon-Specific Osmotic Pump Capsule of Panax notoginseng Saponins (PNS): Formulation, Optimization, and In Vitro-In Vivo Evaluation

  • Dong Jin
  • Bin Wang
  • Rongfeng HuEmail author
  • Dan Su
  • Jiayi Chen
  • Hong Zhou
  • Wenjie Lu
  • Yuxing Guo
  • Wenyou Fang
  • Song Gao
Research Article


In the current study, a novel colon-specific osmotic pump capsule of Panax notoginseng saponins was developed to achieve colon-specific release, a zero-order, thus to promote the efficacy of Panax notoginseng saponins. The capsule was assembled using a semi-permeable capsule shell with contents including Panax notoginseng saponins, sodium chloride (NaCl), and Ludipress. The semipermeable membrane was made of cellulose acetate (CA), along with polyethylene glycol (PEG) 6000 for flexibility and strength, and Eudragit® S100 for colon-specific targeting. The in vitro dissolution test showed an approximately zero-order release of Panax notoginseng saponins over 12 h at pH 7.8 through the pores on the membrane. Meanwhile, the drug release from the optimal formulation was found to be independent of equipment type or agitation speed. Rather, it depended on mainly the osmotic pressure of the dissolution media. The in vivo test in beagle dogs demonstrated that the relative bioavailability of the current system was 487.42% in comparison to that of the marketed product, yet with a prolonged retention time. The novel controlled delivery system for Panax notoginseng saponins in the current study utilizing colon-specific and osmotic pump system therefore offered the advantages of avoiding stomach and enteric irritation, reducing dosage frequency, minimizing the drug fluctuation in plasma, and improving its oral bioavailability.


Panax notoginseng saponins colon-specific osmotic pump capsule pharmacokinetics 



We thank Dr. Jun Shao of St. John’s University for his support in the design and writing of the thesis.

Funding Information

This project was supported by the National Natural Science Foundation of China (No.81573615, No.81274100) and Project of Scientific Research Fund of Anhui University of Chinese medicine (No. 2016zr009).

Compliance with Ethical Standards

Conflict of Interest

The authors declare that they have no conflict of interest.


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Copyright information

© American Association of Pharmaceutical Scientists 2018

Authors and Affiliations

  • Dong Jin
    • 1
  • Bin Wang
    • 1
  • Rongfeng Hu
    • 1
    • 2
    Email author
  • Dan Su
    • 3
  • Jiayi Chen
    • 4
  • Hong Zhou
    • 1
  • Wenjie Lu
    • 5
  • Yuxing Guo
    • 4
  • Wenyou Fang
    • 1
  • Song Gao
    • 1
  1. 1.Key Laboratory of Xin’an Medicine, Ministry of Education, Anhui Province, Key Laboratory of R&D of Chinese MedicineAnhui University of Chinese MedicineHefeiPeople’s Republic of China
  2. 2.Anhui Academy of Chinese Medicine Anhui “115” Xin’an Medicine Research & Development Innovation TeamHefeiPeople’s Republic of China
  3. 3.Department of PharmacyThe First Affiliated Hospital of University of Science and Technology of ChinaHefeiPeople’s Republic of China
  4. 4.Department of Pharmaceutical Sciences, College of pharmacy and Health SciencesSt. John’s UniversityNew YorkUSA
  5. 5.School of PharmacyChina Pharmaceutical UniversityNanjingPeople’s Republic of China

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