Which is true of nitrous oxide in comparison to other gases?

Nitrous oxide is often regarded as the least toxic among common anesthetic agents. This characteristic makes it a favorable option for various medical and dental procedures. Being a non-flammable gas with minimal adverse effects, nitrous oxide is typically well-tolerated by patients. It doesn’t cause significant respiratory irritation, and its effects are generally transient, allowing for rapid recovery once it's discontinued.

In contrast, other anesthetic gases and agents may present higher risks in terms of toxicity or side effects. Some may have long-term implications on organ function or carry higher risks of respiratory depression. This safety profile of nitrous oxide is a significant reason it's widely used in both controlled clinical environments and outpatient settings.

While there are other anesthetic agents that might provide stronger analgesia or have faster rates of excretion, they may also come with increased toxicity or side effects, making nitrous oxide a preferred choice in many scenarios.