Try ginger (with a whiskey in it!) Anything with ginger is good, better than tablets!
Take tablets with you, by all means(the best over the counter are probably "Stugeron",or, if you have a history of serious travel sickness problems, your DR. may be prepared to prescribe "Stugeron Forte) but my advice would be at the first sign of sea-sickness, go to the Medical centre and have a phenergan injection It really is VERY effective; indeed you will probably be feeling better by the time you return to your cabin. that should keep you feeling fine for 24hrs and then if you still feel a little less than wonderful you can "top it up" with Stugeron. Hope this reassures you. Cynthia.
We did this cruise at the beg. of Dec. 08, there was only one night when it was rough enough for the people in the higher decks to complain of excess turbulence. This is why we prefer to be lower down in the middle of the ship. During the day at sea it was also a bit unsteady but not enough to stop us moving safely around the ship and enjoying the amenities and food. Regarding injections be aware that they can be very expensive and are not covered by most insurances. Ginger is good and the bands for your wrist are useful as well. Some people in the lower outside cabins complained of the sea at their windows making them feel ill so be advised to keep curtains closed. ENJOY - WE DID.