In the poll, there's some remedies I found. Anybody suffering from nausea and generally upset stomach, let's try to create a list of effective remedies for kava-induced issues. Please vote for remedies you've found effective, or comment unlisted ones so I can add those. Multiple answers allowed, votes anonymous.
Presumably you are asking in reference to kava?
If so, for me ginger is the best, I like tradicional Jamaican ginger sodas (though many have a high sugar content). My favorite ginger beverage is taking fresh ginger, peeling, slicing into thin strips and boiling it in water over medium/high heat. I then add fresh lemon juice and a touch of organic honey to sweeten it.
It's also an excellent way to get over a cold faster. For this purpose, my Grandmother taught me to add garlic to the ginger, while it's boiling, it sounds gross but it really does wonders. inhaling the vapors in your favorite mug while waiting for it to cool down is another excellent way to loosen mucus.
I suppose that qualifies it as Aromatherapy as well.