Is there a difference (aside from drowsiness) between prescription Gravol and over-the-counter ginger Gravol?

Yes, there may be a difference between the prescription Gravol behind the counter and the over-the-counter Gravol with ginger. The main difference is typically in terms of efficacy and potential side effects. While there may not be a direct comparison between the two products in studies, the traditional Gravol is usually seen as more effective.