by Sam Wade
Gets all the PBS item codes associated with a given drug name or ATC code.
Uses the public PBS API to identify the active authority codes for a given drug name or ATC code.
Uses combinations mapped from PBS claims files to identify active and historical authority codes.
Calculates and visualises the WHO Defined Daily Dose for the item codes associated with a given drug name or ATC code.
Visualises if given item codes fall over or under the co-payment threshold for years of PBS claims that don't record under co-payment dispensings.
Uses the PBS API to add a historical flag variable for each item code.
Uses the PBS API to map item codes to their restriction IDs, authority codes, and restriction texts for the latest schedule.
Uses the PBS API and data extracted from the WHO website to estimate the defined daily dose for each item code.