RT Book, Section A1 Gresham, Chip A1 Brooks, Daniel E. A2 Tintinalli, Judith E. A2 Stapczynski, J. Stephan A2 Ma, O. John A2 Yealy, Donald M. A2 Meckler, Garth D. A2 Cline, David M. SR Print(0) ID 1121513008 T1 Methylxanthines and Nicotine T2 Tintinalli’s Emergency Medicine: A Comprehensive Study Guide, 8e YR 2016 FD 2016 PB McGraw-Hill Education PP New York, NY SN 9780071794763 LK accessemergencymedicine.mhmedical.com/content.aspx?aid=1121513008 RD 2024/03/29 AB Methylxanthines include caffeine, theophylline, theobromine, and nicotine. These agents are plant-derived alkaloids with ubiquitous use in beverages (caffeine in coffee and soda), foods (theobromine in chocolate), tobacco products (nicotine), and medications (theophylline and caffeine). Newer methylxanthine derivatives include pentoxifylline (improves peripheral blood flow) and doxofylline (a bronchodilator).1,2 All methylxanthines have shared pharmacologic properties and very similar pharmacodynamic effects.