1. Theophylline Uses, Side Effects & Warnings - Drugs.com

  2. Theophylline - Wikipedia

  3. Theophylline: What Is It, How Does It Help & Side Effects

  4. Theophylline: MedlinePlus Drug Information

  5. Theophylline | Side Effects, Dosage, Uses & More - Healthline

  6. Theophylline - StatPearls - NCBI Bookshelf

  7. Theophylline Oral: Uses, Side Effects, Interactions, Pictures

  8. Theophylline (Oral Route) Description and Brand Names

  9. Theophylline (Oral Route) Proper Use - Mayo Clinic

  10. Theophylline: Uses, Interactions, Mechanism of Action