Could that med have been Ondansetron (Zofran) by any chance? I came across a research article that claimed positive results for reducing sensory gating deficits in people with SZ. I asked my pdoc about it, but she was dead against trying it because it was meant for treating cancer patients with nausea from chemotherapy. Apparently it works by reducing Serotonin in the gut. I had been all excited that I may have found a solution to one of my most debilitating problems.