Agreed with you on this, just reading some of this forum where people have been using the same herbal treatment for months and months and still have parasites makes me shake my head. If it hasn't helped you the first 3 months, what makes you think another year of this will work? The herbal treatments never kill the parasites let alone the eggs and only serve to agitate the parasites to move into areas where the herbs (and actual medicine that can kill them) can't reach them which will make real treatment even harder.
Now for the OP, while I did recommend Zentel to you, I would also take Shrimpy's advice of finding a good parasitologist. as if you have cysts in your head he or she will have to put you on this medicine with medication to control swelling which could seriously injure you if there are cysts in your brain. I would do the same, but I don't have health insurance right now.