Hi Chickymonkey,
some people react strongly on Rifampin. I tolerated it better than some other abx I was on. Get your liver enzymes checked regularly cause it's hard on the liver.
Also, when are you taking the Rif? Before or after your meals? Try to take them after your meals if you're allowed to.
Ginger and peppermint are good remedies against nausea. I didn't like ginger at all, because it had given me headaches in the past, but I learned to appreciate it because of its good qualities 
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Good that you're taking the detoxing very serious 
You can make tea from fresh ginger, or mix it with organic pineapple juice, or take capsules. Some people get releave by sniffing a handkerchief with a few drops of peppermint essential oil on it.
MarieLS