Everything is going digital, and that includes the way clinicians prescribe medications. Up until recently, so-called “e-prescribing” has been largely limited to non-controlled substances, but times are changing. Hopeful regulators see the key to reducing prescription-drug addiction at the heart of e-prescribing authentication measures, even moving to encourage vendors and providers to get on board with a 2010 revision of DEA rules that allows for controlled substances to be prescribed electronically.