Ivermectin Iverheal 6mg primarily targets the nervous systems of parasites but has limited effects on the human brain under normal circumstances due to the presence of the blood-brain barrier (BBB). The BBB is a protective layer that prevents many substances, including ivermectin, from entering the central nervous system (CNS) in significant amounts.

In parasites, ivermectin binds to glutamate-gated chloride channels, leading to paralysis and death. Humans also possess these channels, but they are located mainly in the peripheral nervous system, not the brain, and the drug does not typically cross the BBB in high concentrations.