Frequencies for first 10,000 rows of drug3cl2 variable in nhamcsed2004 dataset :

        drug class #2 for medication #3 |      Freq.     Percent        Cum.
----------------------------------------+-----------------------------------
                        medicinal gases |          4        0.04        0.04
                   anesthetics, topical |          1        0.01        0.05
          sulfonamides and trimethoprim |          3        0.03        0.08
                  antiarrhythmic agents |          7        0.07        0.15
                              diuretics |          6        0.06        0.21
               calcium channel blockers |          2        0.02        0.23
                          beta blockers |         13        0.13        0.36
           alpha agonist/alpha blockers |          4        0.04        0.40
                 disorders, acid/peptic |          1        0.01        0.41
                         antidiarrheals |          3        0.03        0.44
        antispasmodics/anticholinergics |          4        0.04        0.48
                               antacids |          2        0.02        0.50
                      vitamins/minerals |          3        0.03        0.53
repl/regs of electrolytes/water balance |          1        0.01        0.54
                   estrogens/progestins |          1        0.01        0.55
                         contraceptives |          2        0.02        0.57
                          immune serums |          3        0.03        0.60
      skin/mucous membrane, unspecified |          1        0.01        0.61
              antiseptics/disinfectants |          1        0.01        0.62
                   dermatologics, misc. |          7        0.07        0.69
                     topical analgesics |         18        0.18        0.87
          skeletal muscle hyperactivity |         12        0.12        0.99
         antineoplastics, miscellaneous |          1        0.01        1.00
                cycloplegics/mydriatics |          5        0.05        1.05
ocular anti-infective/anti-inflammatory |         10        0.10        1.15
              miscellaneous ophthalmics |          2        0.02        1.17
       vertigo/motion sickness/vomiting |        143        1.43        2.60
                   analgesics, narcotic |         16        0.16        2.76
               analgesics, non-narcotic |          5        0.05        2.81
           antimigraine/other headaches |          1        0.01        2.82
                         antiarthritics |         48        0.48        3.30
                                  nsaid |         16        0.16        3.46
                           antipyretics |        132        1.32        4.78
   antitussives/expectorants/mucolytics |         17        0.17        4.95
                         antihistamines |          5        0.05        5.00
                    pharmaceutical aids |         44        0.44        5.44
                                      . |      9,456       94.56      100.00
----------------------------------------+-----------------------------------
                                  Total |     10,000      100.00

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