I'm not expert on differential diagnosis but I remember reading the higher niclosamide doses are for dwarves.
Speaking of stevia there was an old post somewhere about it being effective at killing off lyme bacteria. As most of here know lyme is related also to larger parasites. I was experimenting with high doses of stevia powder and I think that it does kill off parasites.
My recent thinking is that we need much higher doses of everything. I might go up to 3 or 4 grams of niclosamide per dose.