I really hate to post the obvious as I am sure you would have tried it but just in case I would like to check if you have tried garlic.
Garlic is one of the single most effective ways to treat candida. Robert F. Cathcart, M.D used to prescribe his patients raw garlic swallowed in as large a chunks as possible as this way they kill yeast all the way through the digestive system, they are an excellent prebiotic too.
If you can hack the smell there really is no better & cheaper alternative. If you take it and experience the same symptoms of a hangover - that is the dead yeast releasing alcohols. When someone stops getting the hangover feeling they should be cleared out of their candida.