True or False: Oxygen is classified as a drug.

Oxygen is classified as a drug because it is used in medical treatments to improve oxygenation and is subject to certain regulations and guidelines when administered. While oxygen is a naturally occurring substance, in the context of healthcare, it is delivered in specific doses, can be prescribed, and has specific therapeutic uses. This classification stems from its role in treating various medical conditions, such as hypoxia, where patients may require supplemental oxygen to maintain adequate oxygen levels in the body. The distinction between its general presence in the environment and its use as part of a therapeutic regimen underscores its classification as a drug in a medical setting.