Dramamine. I keep it for friends going out with me. Never even occurred to me to take it, as I very rarely make a technicolor yawn.

Other than that, I've been on an intense (heavy dose) regime of Panadol & Codeine for osteo-arthritis - think that leads to stomach irritation.

There is an absolute cure for sea-sickness - sit under a tree for a while...
Verum audaces non gerunt indusia alba. - Ipsi dixit MCMLXXII