I pack Benadryl (Diphenhydramine) in my first aid kit. In addition to being an antihistamine, one of its side effects is being a mild sedative. Less woozy feeling than valium, and available in non-prescription strength. Mind, I wouldn't use it for myself for that reason, but it is available if someone is about to go bug-squat crazy from the stress <img src="/images/graemlins/smile.gif" alt="" />
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Member of the toughest, meanest, deadliest, most unrelenting -- and ablest -- form of life in this section of space, a critter that can be killed but can't be tamed. --Robert A. Heinlein