you and only you can tell how your body is going to react to any medication.
Bonine - seems to make you less drowsy than Dramamine. Dramamine does come in a non-drowsy formula- haven't tried that one.
Bonine is fine for the mild to moderate queezies,if however you are prone to severe motion sickness (plane, train, bus car) then you should talk to your doctor about the patch. The main ingredient in the patch is a derivitative of an anti-seizure medication. It has side-effects as all medications do., again the patch is for severe motion sickness.
Try the Bonine at home before you cruise to see how you react.
The ships have wonderful stabalizers you might not even need anything. Its a good idea to have a back-up plan just in case.
Another good option for mild queezies is the Sea Band, or try the ginger remedy- ginger candy, ginger cookies, it even comes in a capsule formula. The ginger remedy works great for me.