Yes, many people know that drinking warm water with honey can help soothe a sore throat. In fact, honey may also be an effective cough suppressant.
In a study involving children over the age of 2 with upper respiratory infections, doctors gave the children warm water with 2 teaspoons (about 10 milliliters) of honey before bed. The results showed that honey seemed to reduce nighttime coughing and improve sleep. Its cough-suppressing effect was similar to that of the over-the-counter cough medicine dextromethorphan. Since honey is relatively inexpensive and easy to obtain, it is worth a try.
However, it is important to note that honey should not be given to infants under the age of 1 year to avoid a rare but serious form of poisoning. Also, remember that coughing is not always bad. It helps clear mucus from the airways. In general (e.g., if you are in good overall health or if the cough is not severe), there is usually no need to suppress a cough.