Final answer:
The form of topical medication that is applied over an extended period and requires removal before the next dose is the transdermal patch. It provides a controlled release of medication for systemic treatment.
Step-by-step explanation:
The type of topical medication that is applied over a long period and should be removed before administering another dose is the transdermal patch. This form of medication delivery is designed to release a drug into the bloodstream through the selective permeability of the skin. Transdermal patches are used for various treatments, including hormone replacement therapy, motion sickness, heart problems, and smoking cessation amongst others. Unlike lotions, creams, or ointments that are typically applied directly to the skin for localized treatment, a transdermal patch is used for systemic treatment and provides a controlled release of medication.