According to the FDA, oxygen is classified as what?

Oxygen is classified by the FDA as a prescription drug because it is used to treat various medical conditions, particularly those related to respiratory issues such as chronic obstructive pulmonary disease (COPD), pneumonia, and during anesthesia. As a regulated substance, it must be prescribed by a qualified healthcare provider, ensuring that it is used safely and effectively for individuals who need supplemental oxygen due to medical conditions. This classification emphasizes the importance of medical oversight in the use of oxygen to avoid potential misuse or adverse effects that could occur without proper guidance. Other categories like nutritional supplements or medical devices do not align with the regulatory framework for oxygen as a therapeutic agent, further affirming its status as a prescription medication.