Frequencies for first 10,000 rows of drug6cl2 variable in nhamcsed2005 dataset :

          ndc code #2 for medication #6 |      Freq.     Percent        Cum.
----------------------------------------+-----------------------------------
                  antiarrhythmic agents |          2        0.02        0.02
                antihypertensive agents |          1        0.01        0.03
                  coronary vasodilators |          1        0.01        0.04
                          beta blockers |          4        0.04        0.08
           alpha agonist/alpha blockers |          2        0.02        0.10
                 disorders, acid/peptic |          1        0.01        0.11
                      vitamins/minerals |          2        0.02        0.13
repl/regs of electrolytes/water balance |          4        0.04        0.17
                   dermatologics, misc. |          3        0.03        0.20
                     topical analgesics |          1        0.01        0.21
                cycloplegics/mydriatics |          1        0.01        0.22
       vertigo/motion sickness/vomiting |          9        0.09        0.31
                   analgesics, narcotic |          2        0.02        0.33
               analgesics, non-narcotic |          1        0.01        0.34
                         antiarthritics |          5        0.05        0.39
                           antipyretics |         13        0.13        0.52
                         antihistamines |          2        0.02        0.54
                    pharmaceutical aids |          5        0.05        0.59
                                      . |      9,941       99.41      100.00
----------------------------------------+-----------------------------------
                                  Total |     10,000      100.00

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