I am trying to query OpenFDA by UPC but the API keeps returning "No Matched Found". I assume this works in the same way as product NDC, which is returning as expected when I try something like this:
https://api.fda.gov/drug/label.json?search=product_ndc:%2259779-612%22
When I switch "product_ndc" with "upc" I get no matching results:
https://api.fda.gov/drug/label.json?search=upc:%22300450449092%22
Am I missing something in the query? Or can the API only handle a subset of UPCs? Thanks in advance for the help!