I had a bad cold two weeks ago. I couldn't even get out of bed because I was coughing, felt nauseated and had a bad migraine. My roommate made me a herbal tea with honey. I found out later that the tea had catnip as a main ingredient. My nausea and migraine went away soon afterward and I fell asleep for about six hours. I felt so much better when I woke up. I think that catnip tea is great for colds.