I just read the huge PDF released on parasites and saw this:

Ivermectin does not pass through the blood-brain barrier and so has no effect on parasites which have entered the brain. Even though it is the most effective anti-helminth on the market, it has no effect on fungal parasites. If you believe you are infected with a fungus, consider fenbendazole, which treats both helminths and fungus. If you gain temporary relief from fenbendazole or ivermectin, but your symptoms keep recurring, it is possible your central nervous system has been infected. Mebendazole will bypass the blood-brain barrier to treat such infections. ANTIHELMINTHICS

I can see why they took out Mebendazole/Combantrin now.