You have completed Topic 3 that taught you about reservoir and matrix delivery systems. Remember these key points:

• Reservoir systems store the active drug in a special compartment in the patch and release the drug through a rate-controlling membrane.
• Matrix systems release the active drug from polymer matrix. This method is dependent on the rate of diffusion through the skin.
• Ortho Evra^TM uses the matrix delivery system.

 

 

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