Important Notice: Our web hosting provider recently started charging us for additional visits, which was unexpected. In response, we're seeking donations. Depending on the situation, we may explore different monetization options for our Community and Expert Contributors. It's crucial to provide more returns for their expertise and offer more Expert Validated Answers or AI Validated Answers. Learn more about our hosting issue here.
Theophylline is a “methylxanthine.” This is a chemical that relaxes smooth muscle around the airways of the lungs. It also may act in other ways to help open the airways. There are other methylxanthines such as caffeine and theobromine. They are found in coffee, tea, and chocolate/cocoa, but they are not as strong as theophylline.
