What is the effect of droperidol on nausea and vomiting?

Droperidol is an antipsychotic medication that has been found to be effective in reducing nausea and vomiting. It works by antagonizing dopamine receptors, specifically in the central nervous system, which helps to decrease the signals that cause nausea and vomiting. This mechanism makes it particularly useful for patients who are at risk of experiencing these symptoms, such as those undergoing surgery or receiving chemotherapy.

In addition to its antiemetic properties, droperidol can also have sedative effects, which may further contribute to a patient's comfort during procedures. The rapid onset of its effects also supports its use in acute settings where nausea and vomiting need to be managed quickly.

The other options do not correctly describe the properties of droperidol. For instance, it is not associated with increasing nausea; rather, it specifically targets the symptom. Furthermore, the notion that it has no effect on nausea fails to recognize its established clinical usage as an antiemetic. Lastly, while the timing of medication efficacy can vary, droperidol is typically effective relatively quickly, contradicting the idea that it is only effective after one hour. Therefore, option B accurately encapsulates the role of droperidol in managing nausea and vomiting.