Can physicians authorize medication by mobile phone?

Looking for mobile systems where physicians can subscribe and authorize medication.

When physicians visit patients at their home (or carehome / care-center / serviceflat), they should be able to (via network or WiFi):

• Lookup patient (/EHR)
• Lookup patient medication
• (eventually add medication)
• Prescribe & Authorize medication
• (eventually add preferred pharmacy)
  

All via their mobile phone, completely paperless

The patient can then visit the pharmacy and receive the medication.

My online search and my extensive Evernote 'library' didn't give me any answers.
Can you give me a hint?
Thanks!