• Telephone-based communication
  Phone key pad technology
  Interactive voice response (IVR)
  Cellular & smart phones
  Short message service (SMS)
  iPhone applications
  
• Internet-based communications/E-mail
  Click to chat
  Voice over Internet Protocol (VoIP)
  Web meetings
  
• Direct mail/Print-on-demand collateral
• Face-to-face interaction
  Nurse-to-patient interaction
  Patient-to-patient interaction
  

When used in combination with one another, each mode of communication can further the practitioners' understanding of challenges patients face with regard to medication compliance.