How To Write Medication Script . Quantities less than 1 mg should be written in micrograms, e.g. Introduce yourself to the patient including your name and role. prescription writing DriverLayer Search Engine from driverlayer.com Know the parts of the prescription. Signature and physician identifiers like npi or dea numbers. A script (also known as a screenplay) creates a free outline of the whole story to be acted out by actors for a film, a stage play, a television program example, etc.