Frequencies for first 10,000 rows of drug8cl2 variable in nhamcsopd2005 dataset :

          ndc code #2 for medication #8 |      Freq.     Percent        Cum.
----------------------------------------+-----------------------------------
vascular disorders, cerebral/peripheral |          1        0.01        0.01
                              diuretics |          4        0.04        0.05
               calcium channel blockers |          1        0.01        0.06
                          beta blockers |          4        0.04        0.10
           alpha agonist/alpha blockers |          7        0.07        0.17
                      vitamins/minerals |          3        0.03        0.20
                   dermatologics, misc. |          2        0.02        0.22
                     topical analgesics |          1        0.01        0.23
       vertigo/motion sickness/vomiting |          2        0.02        0.25
                   analgesics, narcotic |          1        0.01        0.26
                         antiarthritics |         16        0.16        0.42
                                  nsaid |          3        0.03        0.45
                           antipyretics |          6        0.06        0.51
   antitussives/expectorants/mucolytics |          1        0.01        0.52
                         antihistamines |          1        0.01        0.53
        corticosteroid-inhalation/nasal |          1        0.01        0.54
                    pharmaceutical aids |          2        0.02        0.56
                                      . |      9,944       99.44      100.00
----------------------------------------+-----------------------------------
                                  Total |     10,000      100.00

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