Parasites in Children

Can I use fenben for my children? My 4 and 2 year old have several parasites. We live in mold. I’m so stressed about how to treat them as they cannot tolerate herbs due to MCAS. They are chronically starving all the time, have major stomach issues, etc. A biofeedback machine shows they have schistosomiasis, hookworm and Giardia. I don’t want to creat resistance but also don’t want to hurt them with harsh medications. I don’t know what to do! Any advice appreciated.