Drug template confusion

Maybe someone can explain a work flow when adding drugs and products into the system . I have several items that require the same dosing based on weight groups like :
0-20 pounds take 1/2teaspoon once a day
20 - 40 pounds take 1/2twice a day
40 - to 50 pounds take

Do I create a new template for each one ? I see the three spaces in the template box to add but when I did it this way it made everything so confusing when searching :

Also is anyone using a barcode scanner to keep track of inventory within openemr if not is there an open source program that could be implemented that works with OEMR?