It's possible, in many ways.
If they are in your inventory, just select the "text" version, and it will say on the left-hand side if it is a death stick or a healing stick.
Or, in the items screen, you can simply look at the items, and underneath the name of the item, it will show what type item it is. So even if if it called healing stick, it will say death stick underneath.
____________Time to go to war with the Flame Tigers