A Self-contained discrete dosage form
A Self-contained discrete dosage form
It delivers a drug through intact skin at a controlled rate
into the systemic circulation
Transdermal Drug Delivery Systems
Delivery rate is controlled by the skin or membrane in the
delivery system
Transdermal Drug Delivery Systems
being the largest part of the body makes it an efficient
route of administration to achieve either systemic but more
often local effects by the absorption of substances from
outside the skin to the different portions beneath the skin
Skin
percutaneous absorption
Percentage of water and liquid in the skin
40% water, 40% lipid
Transport system of TDDS
Passive diffusion