Frequencies for first 10,000 rows of drug3cl2 variable in nhamcsed2003 dataset :

        drug class #2 for medication #3 |      Freq.     Percent        Cum.
----------------------------------------+-----------------------------------
                        medicinal gases |         13        0.13        0.13
                   anesthetics, topical |          1        0.01        0.14
          sulfonamides and trimethoprim |          1        0.01        0.15
                  antiarrhythmic agents |          3        0.03        0.18
                              diuretics |          8        0.08        0.26
               calcium channel blockers |          1        0.01        0.27
                          beta blockers |          7        0.07        0.34
           alpha agonist/alpha blockers |          8        0.08        0.42
                 disorders, acid/peptic |          3        0.03        0.45
        miscellaneous gastrointestinals |          2        0.02        0.47
        antispasmodics/anticholinergics |          3        0.03        0.50
                      vitamins/minerals |          1        0.01        0.51
repl/regs of electrolytes/water balance |          4        0.04        0.55
                   dermatologics, misc. |         14        0.14        0.69
                       topical steroids |          1        0.01        0.70
                     topical analgesics |         14        0.14        0.84
          skeletal muscle hyperactivity |         20        0.20        1.04
                cycloplegics/mydriatics |          3        0.03        1.07
ocular anti-infective/anti-inflammatory |          1        0.01        1.08
              miscellaneous ophthalmics |          5        0.05        1.13
       vertigo/motion sickness/vomiting |        109        1.09        2.22
                   analgesics, narcotic |         21        0.21        2.43
               analgesics, non-narcotic |          1        0.01        2.44
                         antiarthritics |         45        0.45        2.89
                                  nsaid |         14        0.14        3.03
                           antipyretics |        108        1.08        4.11
                    nasal decongestants |          1        0.01        4.12
   antitussives/expectorants/mucolytics |         15        0.15        4.27
                         antihistamines |          9        0.09        4.36
                    pharmaceutical aids |         55        0.55        4.91
                                      . |      9,509       95.09      100.00
----------------------------------------+-----------------------------------
                                  Total |     10,000      100.00

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