Both riboflavin (vitamin B2) and coenzyme Q10 have shown positive results in reducing the frequency and intensity of migraine attacks, including vestibular migraine (VM), a type of migraine whose symptoms include vestibular symptoms such as vertigo.[1]
Ginger can also be used for relieving nausea [2], although there are only a few studies looking into its potential for treating queasiness specifically caused by vertigo-related conditions.
Finally, various studies looked into the potential of supplementation with vitamin D and calcium to prevent BPPV from recurring, but the results are often inconsistent and conflicting; more research is needed.[3]