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Polyethylene Oxide (PEO) Molecular Weight Effects on Abuse-Deterrent Properties of Matrix Tablets

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Abstract

While polyethylene oxide (PEO)-based matrix tablets are frequently used as abuse-deterrent dosage forms, there is limited information available regarding how the selection of formulation components and manufacturing processes affect the resulting abuse-deterrent properties. The objective of the current study was to evaluate the effects of formulation and process variables on the abuse-deterrent features of PEO-containing tablets. Directly compressed tablets were prepared using three different PEO molecular weights (100,000; 900,000; and 5,000,000). As anticipated, sintering/thermal treatment above the melting point of PEO was crucial to impart crush-resistant features (tablet hardness > 500 N). In addition to the sintering temperature, the weight fraction of PEO in the tablets affected their mechanical strength, and at least 50% w/w PEO was required to impart the desired crush-resistant features. In addition, the formulation and process variables also impacted syringeability and injectability of the PEO gels formed when the tablets were hydrated to simulate attempted drug extraction. High molecular weight PEO (900,000 and 5,000,000) produced gels more resistant to syringeability and injectability compared to low molecular weight PEO (100,000). Sintering above the polymer melting point decreased PEO crystallinity after cooling, and longer sintering times resulted in PEO degradation producing lower viscosity gels with reduced resistance to syringeability and injectability. Although sintering above the melting point of PEO imparts optimal mechanical strength to the tablets, prolonged sintering durations negatively impact polymer stability and alter the resulting abuse-deterrent features of the PEO-based tablet formulations.

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Acknowledgments

The authors would like to thank Dr. Ram Prakash Govindarajan for his assistance and contributions and Dr. Suresh Raghavan for his assistance and use of equipment for the syringeability and injectability studies.

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  1. Division of Pharmaceutics, College of Pharmacy, The University of Iowa, 115 S Grand Avenue, Iowa City, Iowa, 52242-1112, USA

    Saikishore Meruva & Maureen D. Donovan

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  1. Saikishore Meruva
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  2. Maureen D. Donovan
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Correspondence to Maureen D. Donovan.

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Meruva, S., Donovan, M.D. Polyethylene Oxide (PEO) Molecular Weight Effects on Abuse-Deterrent Properties of Matrix Tablets. AAPS PharmSciTech 21, 28 (2020). https://doi.org/10.1208/s12249-019-1565-y

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