Use vicks vapor rub and socks. Even the worst cough can be stopped within 5-15 minutes, and lasts hours. Just apply the vapor rub generously to the bottom of your (or child's) feet, and cover with socks. works 100% of the time, and has been proven to work better than prescription drugs.
FINALLY FOUND THEM! YES!!! I was hunting for these all winter...homemade vicks shower disks If you are congested, pop one in the floor of your shower, let the steam do its work! Not sold in stores anymore!!