AND FEEDB ACK
REGULATED DRUG
DELIVERY SY STEM
SUBMITTED BY
KRISHNA HARIDAS
1ST SEMESTER
M.PHARM
,ACTIVATED MODULATED DRUG DELIVERY SY STEM
• Release of drug molecule is activated from drug delivery system by
some physical ,chemical or biochemical process .
,CLASSIFICATION
PH Y SICAL MEANS CH EMICAL MEANS
HYDRODYNAMIC ACTIVATED ION ACTIVATED
OSMOTIC PRESSURE ACTIVATED Ph ACTIVATED
MECHANICALLY ACTIVATED HYDROLYSIS ACTIVATED
MAGNETICALLY ACTIVATED
SONOPHORESIS ACTIVATED B IOCH EMICAL MEANS
IONTOPHORESIS ACTIVATED ENZYME ACTIVATED
HYDRATION ACTIVATED BIOCHEMICAL ACTIVATED
, PHY SICAL MEANS
OSMOTIC PRESSURE ACTIVATED DDS
Depends on osmotic pressure to release drug.
Dr u g r eser voir ;solution or solid formulation within a sem iper m eable housing w
a controlled water permeability .
For drug delivery system containing solution formulation the intrinsic rate of drug
release Q/t is defined by
W A m / h m (∏ S -∏ e )
For drug delivery system containing solid formulation the intrinsic rate of drug release i
defined by
W A m / h m (∏ S -∏ e ) S d