Medications that exist in the current formulary need to be validated against the available medications before persisting to the database as a new medication. For example:
1) Add a new medication to a formulary
2) Assign initial and current quantity to a # > 0
3) Select this medication from typeahead prescription menu on Medical
4) Add a space to the end of the medication in the input box
5) Delete the added space
A new entry should not be placed in the medications table for this prescription, it should use the entry that was placed in the medications table from step (1).