methylxanthines
/ˌmɛθəlˈzænθiːnz/
noun
- Plural form of methylxanthine; a group of chemical compounds that act as stimulants, found in coffee, tea, chocolate, and some medicines.
- Methylxanthines like caffeine and theobromine are naturally present in many beverages.
- The effects of methylxanthines can include increased alertness and improved focus.
- Doctors sometimes warn patients to limit their intake of methylxanthines if they have heart conditions.