What symptom should the nurse evaluate after administration of dimenhydrinate?

Dimenhydrinate is an antihistamine commonly used to prevent and treat nausea and vomiting associated with motion sickness. After administering dimenhydrinate, it is crucial for the nurse to evaluate the effectiveness of the medication by observing for a decrease in nausea and vomiting. This medication works by blocking certain signals in the brain that trigger these symptoms, providing relief for patients experiencing motion sickness.

While dizziness, headache, and dry mouth are potential side effects of antihistamines like dimenhydrinate, the primary reason for administering the medication in this context is to manage nausea and vomiting. Therefore, monitoring for the resolution of these symptoms is directly related to the therapeutic goal of the drug.