I have menieres. I take 0.5 mg klonopin (clonazepam) 2x daily & diuretic 1 x day. Can I take betahistine 8 mg 2x day /same time to help stop the vertigo attacks?

Controversial. The role of betahistine is controversial. Whereas still used in europe, it is no longer used in the United States, or is very scarcely. If a low salt diet an diuretic is not helping abate the vertigo attacks, you likely need greater intervention.