Selenium is antagonistic to heavy metals, I assume it might be to antimony a well..... how did you accumulate toxic levels of antimony ....please feel free to say "Nun-ya ...."
Don't dump in large amounts of selenium, hoping to clear the antimony, that has side effects as well....
Vitamin C can help limit the damage that heavy metals can do, and even tho it's action may be weak, garlic, being sulfuric, can also help ...
Hoping some of our more science-y members will drop in with better input than I can manage ...
EDIT .... for clarity ....