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Moisture Uptake of Polyoxyethylene Glycol Glycerides Used as Matrices for Drug Delivery: Kinetic Modelling and Practical Implications

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ABSTRACT

Purpose

Gelucire 50/13, a polyoxyethylene glycol glyceride mixture, has been widely used in drug delivery, but its moisture uptake behaviour is still poorly understood. In this study, the effects of relative humidity, temperature, and drug incorporation on the moisture uptake of Gelucire are reported in relation to their practical implications for preparation of solid dispersions using this material.

Methods

DVS combined with kinetics modelling was used as the main experimental method to study the moisture uptake behaviour of Gelucire. Thermal and microscopic methods were employed to investigate the effect of moisture uptake on the physical properties of the material and drug loaded solid dispersions.

Results

The moisture uptake by Gelucire 50/13 is temperature and relative humidity dependent. At low temperatures and low relative humidities, moisture sorption follows a GAB model. The model fitting indicated that at high relative humidities the sorption is a complex process, potentially involving PEG being dissolved and the PEG solution acting as solvent to dissolve other components.

Conclusion

Careful control of the storage and processing environmental conditions are required when using Gelucire 50/13. The incorporation of model drugs not only influences the moisture uptake capacity of Gelucire 50/13 but also the solidification behaviour.

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Authors and Affiliations

  1. School of Pharmacy, University of East Anglia, Norwich, NR4 7TJ, UK

    Sheng Qi, Doroty Codoni & Neerav Darji

  2. School of Chemistry, University of East Anglia, Norwich, NR4 7TJ, UK

    Peter Belton

  3. School of Pharmacy, University of Hertfordshire, Hatfield, AL10 9AB, UK

    William McAuley

Authors
  1. Sheng Qi
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  2. Peter Belton
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  3. William McAuley
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  4. Doroty Codoni
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  5. Neerav Darji
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Correspondence to Sheng Qi.

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Qi, S., Belton, P., McAuley, W. et al. Moisture Uptake of Polyoxyethylene Glycol Glycerides Used as Matrices for Drug Delivery: Kinetic Modelling and Practical Implications. Pharm Res 30, 1123–1136 (2013). https://doi.org/10.1007/s11095-012-0948-5

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  • DOI: https://doi.org/10.1007/s11095-012-0948-5

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