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News

Particle Sciences develops microreservoir technology for drug-eluting polymer medical devices

Particle Sciences : 27 August, 2008  (New Product)
Particle Sciences has developed its ‘Microreservoir’ technology enabling the manufacture of drug-eluting polymer medical devices that release drugs at constant rates over 30 days or more.
The technology has already been used by Particles Sciences to develop drug eluting vaginal rings.

'Drug release from polymeric materials often follows a burst/first-order kinetic profile which may not be clinically desired,' explained Andrew Loxley, director of New Technologies. 'Traditionally the burst effect has been reduced by confining the API to a reservoir within the device, but this adds complexity and cost to production.'

In its approach, Particle Sciences' scientists first encapsulate the drug in polymer microparticles before blending with the polymer used to make the final product. Robert Lee, vice president of Pharmaceutical Development commented, 'Microencapsulating the drug enabled the use of simple moulding processes to fabricate devices containing tens of thousands of 'microreservoirs,' and the devices exhibit constant drug release profiles equivalent to traditional reservoir devices. This approach greatly simplifies production and adds tremendous flexibility to both single and multi-drug devices.'

Particle Sciences sees broad utility for this proprietary technology, which is applicable to polymer devices, films, coatings and other polymeric structures from which drugs or other materials are to be released at a constant rate.
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