On the cruise a couple weeks ago people were lining up at the front desk for whatever two pill packets they were giving away like candy. I never even noticed very much chop at all. They were also recommending green apples and crackers.

It's a totally personal thing. There are many things available over the counter that the people who use them swear by. Bonine for example is one name you see quite a bit of.

Don't ever assume something is totally calm. Wind could be an issue, if the ship can not get to a dock and you have to go to port by small tender ships that could be an issue, etc. I think you would be much better on the inside passage of Alaska then the west coast of Mexico, but be prepared just in case should you be one of the people affected by it.