Possible Clues:

• E-mail options, and this puzzle's theme
• R.N. measures
• Patient's dosage measure, for short
• Includes in an email, for short
• Hypo meas.
• Some dosage units (Abbr.)
• Some duplicates: Abbr.
• Sends a duplicate to, briefly
• Types between 'From' and 'To,' perhaps
• E-mails a couple of people, perhaps