Frequencies for ndcdescription variable in nadacc20170531 dataset : NDC Description | Freq. Percent Cum. -------------------------------+----------------------------------- ABACAVIR 300 MG TABLET | 10 23.26 23.26 D-AMPHETAMINE ER 10 MG CAPSULE | 8 18.60 41.86 D-AMPHETAMINE ER 5 MG CAPSULE | 6 13.95 55.81 DYMISTA NASAL SPRAY | 1 2.33 58.14 IMITREX 6 MG/0.5 ML PEN INJECT | 1 2.33 60.47 LEVETIRACETAM 100 MG/ML SOLN | 13 30.23 90.70 OFLOXACIN 0.3% EAR DROPS | 3 6.98 97.67 PROCTOFOAM-HC 1%-1% FOAM | 1 2.33 100.00 -------------------------------+----------------------------------- Total | 43 100.00 by Jean Roth , jroth@nber.org , 10 Feb 2018