For advice on the best remedy for minor ailments, people often turn to experts outside the medical establishment — to a bartender, say, for a hangover cure, or to a hypochondriac for the pros and cons of various cold or flu medications.

So it is not surprising that for tips on combatting two of the most maddening afflictions of business travel, insomnia and jet lag, business travelers turn to other business travelers.

Or that for treating those infirmities, they sometimes visit drugstores abroad to buy tonics that are cheaper, more exotic or just plain more available than they are back home.

http://www.nytimes.com/2003/04/08/business/08PILL.html