Feliway is a spray or electric diffuser containing a synthetic copy of the feline facial pheromone. This pheromones are used by cats to mark their territory as safe and secure. This helps the cat feel comforted and reassured in a challenging situation. It helps or prevents stress and is recommended when you introduce cats to each other, when there are fireworks or any other stressful situation. I have the electric diffuser and I love it. First I got it for new years eve, but when I found out one of my cats was highly stress intolerant I started to use the diffuser continuously. It's not making them drowsy, just happier and more relaxt. My VET recommends it as well, which makes me more comfortable using it. Want to know more? visit [url="http://www.feliway.com"]www.feliway.com[/url]