what to eat to kill them? and dosage for a 120 pound girl?

It says in several parasite cleanse pamphlets that if under 150 pounds one should perhaps take a half dosage...has anyone done this?
I'd like to know if anyone less than 150 pounds did the full dose with sucess
Im guessing the worst that could happen is severe die off?
opinions?

also, can anyone point me to a link that says what foods feed parasites and what foods starve the parasites?if im going to do this im going to do it right