_dta:
  1.  by Jean Roth , jroth@nber.org , 23 Feb 2018
  2.  NBER URL:  http://www.nber.org/data/fda-orange-book-data.html
  3.  Source Page: http://www.fda.gov/Drugs/InformationOnDrugs/ucm129662.htm
  4.  Source File URL: www.fda.gov/downloads/Drugs/InformationOnDrugs/UCM163762.zip
  5.  Source Text File: products.txt
  6.  ingredient is a wide variable with multiple ingredients separated by a semicolon.

ingredient:
  1.  The active ingredient(s) for the product.
  2.  Multiple ingredients are in alphabetical order, separated by a semicolon.

  obs:         3,393                          
 vars:             3                          23 Feb 2018 13:20
 size:       967,005                          (_dta has notes)
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              storage   display    value
variable name   type    format     label      variable label
-----------------------------------------------------------------------------------------------------------------------------------------------------
ingredient      str233  %233s               * Ingredient
singnum         byte    %9.0g                 Single Ingredient Number
singredient     str51   %51s                  Single Ingredient
                                            * indicated variables have notes
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Sorted by: ingredient