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I am trying to look at the Novartis medicines on openFDA open data on drug labeling for a given period.

I tried this:

https://api.fda.gov/drug/label.json?search=spl_patient_package_insert:"Novartis"& spl_product_data_elements&effective_time:[20110601+TO+20181231]&limit=1

But I end up getting an error:

{
    "error": {
    "code": "BAD_REQUEST",
    "message": "Invalid parameter:  spl_product_data_elements"
  }
}

What am doing wrong? What is the correct field to get Novartis?

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Here is the corrected query:

https://api.fda.gov/drug/label.json?search=spl_patient_package_insert:"Novartis"+AND+_exists_:spl_product_data_elements+AND+effective_time:[20110601+TO+20181231]&limit=1

You need to use +AND+ instead of & and _exists_ to ensure a particular field is present in the document. More information about the syntax of openFDA queries can be found on our website.

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