The over the counter sea sickness meds work very well for me. I've also heard from several people that the wrist bands work well.
Mary Lou Scanlon
NCL Pride of America April 24, 2010
NCL Epic February 12, 2011
RCCL Allure of the Seas - September 18, 2011
Celebrity Eclipse - February 11, 2012:
RCCL Navigator OTS - February 9, 2013
I would pack Bonine as a back-up plan. You might not even need it.
I have had very good success using the ginger remedy(ginger cookies, ginger candy, ginger-ale as long it is made from ginger and not just flavor) You can even buy ginger capsules at your local pharmacy or health-food store.
Bonine has always worked for my husband and I; one chewable tablet in the morning and fergit about it! No drowsiness, no seasickness. However, they cannot be used as a back-up plan, once you start feeling ill, it won't change things, so better to take it than not.
8/92 Mex. Riv. Commodore
9/98, 9/00, 9/02 & 7/04 Caribbean - Paradise
10/00, 08/05 Pac. Wtrs. Holiday, Monarch
04/06 Hawaii - Celebrity Summit
09/07 Alaska - Celebrity Summit
07/09 Western Caribbean RCCL Liberty of the Seas