Transdermal Patches Drug Delivery System
Transdermal patches are medicinal adhesive patches that are applied to the
skin and used to deliver a specific amount of medication through the skin into
the bloodstream. Transdermal drug delivery systems are drugs administered
topically as patches that deliver drugs at a predetermined and controlled rate
for systemic effects. Theoretically, transdermal patches work on a very simple
principle. The drug is administered at a relatively high dose to the inside of
the patch, which is worn on the skin for an extended period of time. Through
a diffusion process, the drug passes directly through the skin into the
bloodstream. Due to the high concentration on the patch and the low
concentration in the blood, the drug will continue to diffuse into the
bloodstream for a long time, keeping the drug concentration in the
bloodstream constant.
Advantages of Transdermal Patches
