Frequencies for first 10,000 rows of drug4cl2 variable in nhamcsed2005 dataset :

          ndc code #2 for medication #4 |      Freq.     Percent        Cum.
----------------------------------------+-----------------------------------
                        medicinal gases |          5        0.05        0.05
                   anesthetics, topical |          1        0.01        0.06
                  antiarrhythmic agents |          3        0.03        0.09
                              diuretics |          3        0.03        0.12
                          beta blockers |          5        0.05        0.17
           alpha agonist/alpha blockers |          2        0.02        0.19
                         antidiarrheals |          1        0.01        0.20
        miscellaneous gastrointestinals |          1        0.01        0.21
        antispasmodics/anticholinergics |          1        0.01        0.22
                      vitamins/minerals |          3        0.03        0.25
repl/regs of electrolytes/water balance |          1        0.01        0.26
                   estrogens/progestins |          1        0.01        0.27
      skin/mucous membrane, unspecified |          1        0.01        0.28
                   dermatologics, misc. |          6        0.06        0.34
                     topical analgesics |         11        0.11        0.45
          skeletal muscle hyperactivity |          2        0.02        0.47
                cycloplegics/mydriatics |          1        0.01        0.48
ocular anti-infective/anti-inflammatory |          4        0.04        0.52
              miscellaneous ophthalmics |          4        0.04        0.56
       vertigo/motion sickness/vomiting |         63        0.63        1.19
                   analgesics, narcotic |          5        0.05        1.24
               analgesics, non-narcotic |          1        0.01        1.25
                         antiarthritics |         24        0.24        1.49
                                  nsaid |          4        0.04        1.53
                           antipyretics |         65        0.65        2.18
                         antiprotozoals |          1        0.01        2.19
   antitussives/expectorants/mucolytics |          8        0.08        2.27
                         antihistamines |          7        0.07        2.34
                           unclassified |          1        0.01        2.35
                    pharmaceutical aids |         32        0.32        2.67
                                      . |      9,733       97.33      100.00
----------------------------------------+-----------------------------------
                                  Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 28 Mar 2016