Percentage increase in sales from 2005 to 2006 is the lowest for which brand of a pain killer?Method: compare each brand's growth as a simple fraction of its 2005 base before converting to percentages.
Nise has the smallest growth fraction, so it has the lowest percentage increase, confirming option 4.
\[\boxed{\text{Nise}}\]
Percentage of increase in sales from 2005 to 2006 is the highest for which brand of a pain killer?