Frequencies for first 10,000 rows of drug2cl2 variable in nhamcsed2003 dataset :

        drug class #2 for medication #2 |      Freq.     Percent        Cum.
----------------------------------------+-----------------------------------
                        medicinal gases |         10        0.10        0.10
          sulfonamides and trimethoprim |          3        0.03        0.13
                  antiarrhythmic agents |          6        0.06        0.19
                              diuretics |          5        0.05        0.24
               calcium channel blockers |          2        0.02        0.26
                          beta blockers |          7        0.07        0.33
           alpha agonist/alpha blockers |          6        0.06        0.39
                         antidiarrheals |          3        0.03        0.42
        miscellaneous gastrointestinals |          2        0.02        0.44
        antispasmodics/anticholinergics |          5        0.05        0.49
                      vitamins/minerals |          4        0.04        0.53
repl/regs of electrolytes/water balance |          2        0.02        0.55
                       immunomodulators |          1        0.01        0.56
      skin/mucous membrane, unspecified |          2        0.02        0.58
                   dermatologics, misc. |         10        0.10        0.68
               dermatitis/antipruritics |          1        0.01        0.69
                     topical analgesics |         28        0.28        0.97
          skeletal muscle hyperactivity |         38        0.38        1.35
      hormonal/biological response mod. |          1        0.01        1.36
                cycloplegics/mydriatics |         11        0.11        1.47
ocular anti-infective/anti-inflammatory |          4        0.04        1.51
              miscellaneous ophthalmics |         10        0.10        1.61
       vertigo/motion sickness/vomiting |        363        3.63        5.24
                   analgesics, narcotic |         40        0.40        5.64
               analgesics, non-narcotic |          5        0.05        5.69
           antimigraine/other headaches |          2        0.02        5.71
                         antiarthritics |         76        0.76        6.47
                                  nsaid |         26        0.26        6.73
                           antipyretics |        291        2.91        9.64
                    nasal decongestants |          1        0.01        9.65
   antitussives/expectorants/mucolytics |         18        0.18        9.83
                         antihistamines |         22        0.22       10.05
                    pharmaceutical aids |         59        0.59       10.64
                                      . |      8,936       89.36      100.00
----------------------------------------+-----------------------------------
                                  Total |     10,000      100.00

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