In medical gas pharmacy, which two gases are primarily regulated?

The primary gases regulated in medical gas pharmacy are oxygen and nitrous oxide. Oxygen is essential for various medical treatments, particularly in emergency care and for patients with respiratory illnesses, and its distribution and use are closely monitored to ensure safety and compliance with health regulations. Nitrous oxide, often used as an anesthetic and analgesic, also requires regulation due to its medical applications. These gases are specifically regulated to ensure proper handling, storage, and administration, given their importance in medical settings and the potential risks associated with their misuse or mishandling.

The other options do not contain gases that hold the same level of regulatory scrutiny in medical contexts. Carbon dioxide and helium, while they have medical uses, are not primarily designated as regulated gases in the same manner as oxygen and nitrous oxide. Helium and argon have limited therapeutic applications and are thus not a focus of medical gas regulation. Ozone, although it has medical applications, is not typically regulated as a medical gas within pharmacies and nitrogen does not have direct therapeutic applications that would require regulation in a pharmacy context.