Christopher Hobbs (the best) used gingko, you can find his books on line somewhere.
The desert parsley was also a specific for this, but very powerful.
Ideally you do all the standard cleanses talked about here and the problem should go away, after 7 liver flushes do the orange juice fasting until well in my motto.
Parasites most likely be a huge issue, so when you kill them, be flushing well and get rid of them. You will need to follow instructions and not do as you please or you may have some ill effects of throwing up, etc. You must get control of it and not let it control you.