Miracle Cure?

I've read a good few times that rubbing Vicks liberally onto the soles of your feet and then putting on socks to sleep in means you don't cough during the night. It's been proven time and time again and scientists confirm this, but can't say why. I'll be trying it tonight, giving that I've only had a few hours sleep during last night and the night before. Please work Vicks! If it doesn't, the childhood comfort smell might be enough!