The Great Pyramid of Giza is the oldest monument on the list of the Seven Wonders of the Ancient World.
Guaifenesin is an expectorant that helps thin and loosen mucus in the lungs, making it easier to cough up the mucus. Codeine is a narcotic cough suppressant (antitussive) that affects a certain part of the brain, reducing the urge to cough.ow to use Guaifenesin AC. Take this medication by mouth with or without food, usually every 4 to 6 hours as needed with a full glass of water (8 ounces or 240 milliliters) or as directed by your doctor.
Definition. 1  Expectorants are drugs that loosen and clear mucus and phlegm from the respiratory tract. 2  The drug described here, guaifenesin, is a common ingredient in cough medicines. It is classified as an expectorant, a medicine that helps clear mucus and other secretions from the respiratory tract. However, some debate exists about how effectively guaifenesin does this. In addition, some cough medicines contain other ingredients that may cancel out guaifenesin's effects.