Promethazine is primarily used to address which of the following?

Promethazine is primarily used to manage allergy symptoms and nausea. It belongs to a class of medications called antihistamines, which are effective in alleviating symptoms associated with allergic reactions, such as itching, runny nose, and hives. Additionally, promethazine is often utilized to prevent and treat nausea and vomiting, particularly in situations like motion sickness or post-operative settings.

In the context of patient care, understanding the primary uses of promethazine helps healthcare providers appropriately choose treatments for patients presenting with allergic reactions or nausea, ensuring effective symptom relief. The other options do not align with the primary indications for promethazine and thus are not considered accurate in this context.