Abstract
The introduction of prescription opioids with abuse-deterrent (AD) properties to the marketplace has created a need for new testing methodologies to evaluate the performance of potentially abuse-deterrent opioid products. Drug abusers may attempt to chew solid oral extended-release (ER) opioids prior to ingestion to bypass the ER mechanism of the formulation to achieve euphoria. In the present study, a chewing apparatus was utilized to develop an in vitro chewing method for Hysingla ER tablets, a prescription opioid with labeling describing abuse deterrence via the oral route when chewed. Simulated chewing of Hysingla resulted in initially faster drug release during chewing while subsequent dissolution testing demonstrated that the masticated tablets still maintained ER properties. The degree of mastication and corresponding drug release were influenced by the compression gap and the resulting chewing forces. Simulated chewing followed by dissolution testing with different strengths of Hysingla indicated similar AD performance across strengths. By contrast, an opioid product with labeling that does not describe abuse-deterrent properties showed lower resistance to chewing resulting in higher drug release. The results of the present study suggest that the chewing methodology evaluated in this work may provide a useful in vitro tool for the comparative evaluation of AD properties.
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