Niacin, which is vitamin B3, the kind that makes you flush, I have found to be very calming for the nerves. Combined with B2, and it helped my eyes and sinuses feel strong and resiliant. I no longer had eye-headaches or a sensitivity to light after finishing a bottle of B2 and a bottle of B3. I hear the "non-flush" kind of niacin does not work as well, and the flush is good in a way because it lets you know how much you can take, and when to back off.
It's sooo relaxing & calming to the nerves. It destroys anxiety. I love that stuff, & it's a vitamin available at most any drugstore and most health-stores. Cheap too.