Levetiracetam is an antiepileptic medication that modulates neuronal excitability by binding to the synaptic vesicle protein SV2A, which reduces neurotransmitter release and stabilizes neuronal membranes. In Visual Snow Syndrome, it is hypothesized to decrease hyperactive cortical signaling and normalize aberrant neuronal firing patterns, potentially mitigating visual disturbances by dampening excessive neuronal excitation.