[Elaine]

Doubledoc

Most travel sickness drugs work by inhibiting the action of the inner ear, part of the system that controls balance, thus reducing feelings of nausea and vomiting.

The general tips for pre-travel won't come as a surprise but it is worth preparing for your journey. Eat lightly three hours before intended travel, avoiding foods high in protein and salt. stay clear of alcohol before and during travel. If you are on a boat, get plenty of fresh air, if the weather allows for this!

These drugs can make you feel a bit groggy, and alcohol increases this, so it is better to avoid it altogether, as you seem to have found out.