A medication that is marketed for a different use than originally approved is called?

A medication that is marketed for a different use than originally approved is referred to as off-label use. This occurs when a physician prescribes a medication for a condition that it has not been officially approved to treat by regulatory agencies such as the FDA. While this practice is legal and can be based on sound clinical evidence and judgment, it is not endorsed by the drug manufacturer in their labeling.

The primary distinction here is that off-label use involves utilizing an approved drug for a purpose that differs from its prescribed indications, which can often lead to innovative treatment strategies but also carries risks, as the safety and effectiveness of such uses may not have been thoroughly studied.