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Drug Delivery (Diffusion-controlled system (monolithic-matrix (Dissolved…

- - - - loaded below solubility limit
    - - above solubility limit
- - - - Become neutral at certain pH, become hydrophobic, causes collapse or swelling, therefore drug is released
    - - matrix physically changes or goes through phase transitions at certain T
    - - ultrasound waves will degrade matrix and rug is released
    - - Pulses of electric and magnetic field change of the shape of the membrane, releasing the drug