Venlafaxine is a serotonin-norepinephrine reuptake inhibitor (SNRI) that increases neurotransmitter levels in the brain by blocking the reuptake of serotonin and norepinephrine. In Visual Snow Syndrome, it may help modulate neural hyperactivity and reduce cortical hyperexcitability, potentially alleviating visual and neurological symptoms by improving neurotransmitter balance and neuronal signaling.