Although oregano is best known for giving pizza and pasta an extra kick, Patrick Fratellone, MD, a leading integrative medicine doctor and registered herbalist with the American Herbal Guild, recommends reaching for this herb to treat a hacking cough. "Oregano is a powerhouse of flu-fighting properties since it's antibacterial, anti-fungal, and an antioxidant, and it can also be used an expectorant to treat lung or respiratory conditions," says Dr. Fratellone. You could take an oregano capsule twice a day with meals, but if all you have on hand is a bottle of the dried herb, you can make an oregano tea: Pour 8 ounces of boiling water over 1 teaspoon of dried oregano and let stand for 10 minutes. If the taste is too bitter, add some raw honey. Aim to drink two cups a day. This elixir can also be used topically to treat skin infections and calm down an upset stomach. Check out the impressive health benefits of oregano oil.