Do you mean Bach's Rescue Remedy which is distilled from flower extracts? I used to take the drops under the tongue years ago, when my life was really stressed out. It definitely has a calming effect. It's not like taking a Valium, but like a 100X megadose of camomile tea.
I tried to use the no-alcohol, pet version for my cat a few years ago, before we went traveling. But, I couldn't get her to take any. She could have really used it on that trip.