"Transdermal medications" refers to medicines that are applied on the skin and gradually absorbed into the body through the skin barrier. Full definition
Kindred Biosciences Inc. is planning the summer 2018 release of what the company describes as the first and only FDA - approved transdermal medication for the management of weight loss in cats. (todaysveterinarybusiness.com)
Remember: the skin is your body's largest organ and absorbs almost all of what is applied on it (consider that fact that there are transdermal medications). (bodyunburdened.com)