Have you tried diphenhydramine (anti-histamine) by any chance? I suffered for years from dizziness and nausea, then found a simple answer right in my own medicine cabinet. The normal adult dose is usually enough, though sometimes I have to go about 50% over for extreme sessions. Discuss this with your physician before trying, especially if going off-label and above-dosage, but it's been good for me. I always say, anything that helps is helpful.