Information about Transdermal Patches

A Transdermal Patch consists of liners, adherents, drug reservoirs, etc. allowing the drug to be released from the patch into the skin once administered.

The basic components of the patches and their purpose are:

  • Polymer matrix – Controls the release of the drug.
  • Drug – The medication for relief from pain.
  • Permeation enhancers – The drug is stored in a reservoir, a plastic laminated compartment which controls the polymer matrix.
  • Other excipients – Adhesives (to allow the patch to stick to the skin) and backing membrane (should be flexible and bond to the drug reservoir to prevent the drug from leaking)

Transdermal patches are user friendly, generally inexpensive, and painless to use. A Patient can administer the medication in a convenient manner by just applying the patch onto the skin. Transdermal patches offer the same concentration of multiple doses which must be administered throughout the day through a single patch. The effects of the drugs in the patch are for longer periods of time when compared to conventional medications. The patches are easy to use and the drug therapy can be terminated immediately through the removal of the patch.