Which of the following is NOT one of the 9 common adverse effects in the use of nitrous oxide?

Nitrous oxide, commonly known as laughing gas, is often used for its anesthetic and analgesic properties, especially in dental and medical settings. Among the various adverse effects associated with its use, hypertension is not typically recognized as one of the common issues.

When nitrous oxide is administered, it can lead to drowsiness due to its sedative effects. Middle ear aggravation can occur because nitrous oxide can expand in body cavities, potentially affecting the middle ear. Decreased cardiac output, while not as commonly discussed, can also be a concern due to the effects of nitrous on the cardiovascular system, particularly when combined with other anesthetics or in patients with preexisting conditions.

Hypertension, however, does not align with the expected adverse effects of nitrous oxide. Instead, the gas is more likely to cause hypotension (decreased blood pressure) rather than elevated blood pressure conditions. This distinction helps clarify why it stands out from the others as NOT being a common adverse effect associated with nitrous oxide use.