Where is a scopolamine patch commonly applied and why?

The scopolamine patch is commonly applied behind the ear due to favorable anatomical and physiological characteristics of that area. The skin behind the ear has rich blood supply, which facilitates the absorption of the medication into the systemic circulation. This method of application allows for a steady and sustained release of the drug over time, making it effective for preventing nausea and vomiting, especially in the context of motion sickness or postoperative nausea.

Using this location also enhances patient compliance as the patch is discreet and can be worn comfortably while remaining relatively out of sight. Additionally, the area is less prone to excessive movement compared to areas like the wrist or forearm, which could lead to inconsistencies in drug absorption if the patch were to be disturbed. The formulation of the patch leverages these properties to ensure optimal drug delivery for its intended therapeutic effects.