i was watching discovery and they just had a show about "neuropeptide Y". Apparently it's a natural chemical in our brains that controls adrenaline which causes stress and anxiety. The US military are doing research on this to see how it benefits soliders during warfare. That is, if they can produce more neuropeptide Y they can in turn keep their cool and be less stressed. They believe eventually they can make it into a pharmaceutical product.
I just thought how this could apply to climbing. A couple pills of Neuropeptide Y before a scary send would control your adrenaline overflow and help you keep you cool to get you through the climb. Interesting...