Avoid alcohol, spicy or greasy foods and anything that you typically have trouble with digesting both before and during your journey. Also try not to overeat. An upset stomach due to one of these things may make your sea sickness symptoms worse.
If you become ill, MayoClinic.com recommends eating dry crackers or drinking a carbonated drink to settle your stomach.
Find a place where the motion of the ship is felt at a minimum and that allows you to look at the horizon. On a ship, the least motion is felt at the front or middle section or on the upper deck. By allowing your brain to use the horizon as a point of reference, you may find symptoms decrease.
Going below decks where you can't see land or look at the horizon can make your symptoms worse. To ease nausea, take deep breaths of fresh air and drink plenty of water to avoid dehydration. Also avoid smoking or sitting near smokers, because cigarette smoke might make nausea worse.
MayoClinic.com recommends taking an over-the-counter medication like meclizine or one that contains dimenhydrinate 30 to 60 minutes before travel. These medications might make you drowsy, so be prepared to rest. Another option is scopolamine, which is available by prescription. This medication is given in the form of a patch, which you apply behind your ear several hours before you travel. It gives you 72 hours of medication.
Often, allowing your brain time to recover from the sudden change in equilibrium will alleviate symptoms of sea sickness. Relax and try to sleep at the right times and for enough hours. A prone position helps to lessen the continual sensation of movement. It's advisable not to lie in your cabin all of the time either. Finding a deck chair to relax on outside will give you needed fresh air. While resting, try to keep your head still and against a solid surface.
