If you're looking for natural or OTC treatments for nausea, start with ginger ale. If you want something stronger, try ginger beer (it's not alcoholic, but it can be hard to find in a regular grocery store). Both help with nausea, but the effect doesn't last all that long. Beyond that, for bad nausea with quick onset, try Emetrol. It's OTC and available in brand-name or generic in any drugstore. It really works, but again, doesn't necessarily last long.