I'm expert at Sea Sickness (getting it that is). I have tried numerous things some work better than others.
Note: If you are prone to getting sick, there will be sea conditions that you just cannot overcome - no matter what you try. Those 4'+ rollers will generally do it every time.
Once the 'feeling' starts coming on, you are pretty much done for.
Unless you're in a small boat and can go for a ride. Get some wind in your face. Ask to 'drive' the boat - it will take your mind off the sickness for a bit. You will feel better. This has worked every time for me and for others on my boat.
Some other key points in addition to what’s been said:
1-Stay away from any fumes - yes fuel (diesel & gas), but also cigarette smoke does it to me.
2-Do not drink alcohol the night before or while on the boat.
3-Do not eat anything heavy the night before OR that morning. Rolls, bagels ok, but no butter, cream cheese, etc.
4-Acidick drinks (OJ, Coffee, etc.) are bad news. Drink Gatorade or Ginger ale.
5-Eat pretzels or ginger snap cookies while on the boat. The plain dry composition of these will soak up any acid in your stomach.
6-Pack 'dry' sandwiches - No Mayo or oil/vinegar. Basically pick things that are nice to your tummy.
Medication & 'gizmos':
1- ScoPace. (need a prescription). This pill that you take 1 the night before & 1 in the morning has proven to be flawless so far. It has also worked for a buddy of mine that gets sea sick standing on the dock. HIGHLY recommended !!!
2-The Patch (Scopolamine Transderm - need a prescription) - it does work sometimes, but will make you drowsy/woozy (sp?)
3-Bonine works ok - but MUST be in your system for a while to be effective. 1-2 hours min, PLUS take it again every 3-4 hours or until you think you ok for the day.
4- MotionEase - liquid you place behind your ear (same place as the patch). This stuff is showing some process on all but the worst days.
This is also something that you can put on once you start feeling sick and might hold you off a little longer. I'm still experimenting some more with it.
5-Bands - have them - useless
6-Wrist watch type - tried it once, but needs more experimenting.
Best of luck - I know your pain
John