MedlinePlus: Theophylline - http://www.nlm.nih.gov/medlineplus/druginfo/meds/a681006.html
Features information about dosage, usage, warnings, and side effects. |
Theophylline: Questions and Answers - http://www.nationaljewish.org/healthinfo/medications/lung-diseases/longterm/theophylline-faqs.aspx
Fact sheet from National Jewish Medical and Research Center (USA) discusses dosage, the different preparations that contain this medication, and patient monitoring. |