Transdermal patches can be a very precise time released method of delivering a drug. Cutting a patch in half might affect the dose delivered. The release of the active component from a transdermal delivery system (patch) may be controlled by diffusion through the adhesive which covers the whole patch, by diffusion through a membrane which may only have adhesive on the patch rim or drug release may be controlled by release from a polymer matrix. Cutting a patch might cause rapid dehydration of the base of the medicine and affect the rate of diffusion.
Steroids are naturally occurring substances that are produced in our bodies to regulate growth and immune function. There are many different kinds of steroids, including “anabolic steroids” such as testosterone and “female hormones” such as estrogen , and corticosteroids such as cortisol, which is produced by the adrenal glands. Corticosteroids are the type of steroid used for eczema. Corticosteroids have many functions in the body, but among other things, they are very effective at controlling inflammation. The way corticosteroids reduce inflammation is very complicated, but it involves temporarily altering the function of a number of cells and chemicals in the skin.