I know this might sound aweful, but I find eating stuff to make you throw up is really good in the longer run- i.e 2-3 days of bad weather. It makes your stomach feel a lot stronger afterwards and I aclimatise (sp) better afterwards. Also keep away from focusing on close things like tvs or books. Cold air is also really good.
If you’re on one of the Farstaad boats, go see the medic – they have absolutely amazing things called "Cyborg implants". They are morphine impregnated plasters that you stick behind your ear. The morphine gets absorbed through the skin, dries the fluids in your ear and makes you less sensitive to movement.
I was on the far saga a year ago in mountainous seas (beyond 11m heave at the cog and water jumping out of the moonpool to above the wheelhouse) and after coating the back of my skull with these things I felt great 😈 !!!
They are prescribed I think, so the medic will control how many you get to use.
Feel better. ❗