The drugFoodByProductID(...) function returns foods that may interact with a drug.  The result of drugDrugByProductID(...) is a list of possible food interactions in an array of type String[Integer] where the first value is at index 0:

Syntax:
drugFoodByProductID( productID )
productID.drugFoodByProductID(  ) 

Parameter	Description
productID	ProductID for a drug from the "medName" lookup