Dramamine..Pill or Patch?

I am going to be going on a cruise, and I do get sea sick, and wanted to know what everything thinks is better? The Dramamine pill or patch? I have only had the pill, and it worked fine...but I have heard that the patch is less of a stress. I have also heard that the patch can cause blurred vision and dry mouth? Is this true and which do you think is better to use?