Oolong tea contains caffeine. The body breaks down caffeine to get rid of it. Mexiletine (Mexitil) can decrease how quickly the body breaks down caffeine. Taking mexiletine (Mexitil) along with oolong tea might increase the caffeine effects and side effects of oolong tea.

Is there a lot of caffeine in oolong tea?

Oolong tea is a traditional Chinese tea that offers a more diverse flavor, body, and complexity than any popular tea variants in the U.S. Its caffeine content is in between the amount in black tea and green tea with 37 to 55 milligrams per eight ounce serving.

What are the side effects of oolong tea?