Scientists: Catnip activates cats' opioid receptors like heroin does in people, also acts as mosquito repellent

The physiology of how catnip gets cats high has mostly been a scientific mystery. But now, researchers from Japan's Iwate University have determined that catnip, and also silver vine, activate the opioid systems in the feline brain similarly to how heroin and morphine works on humans. — Read the rest