Research shows that we absorb visual information more readily from the left side and verbal information from a right side. Under conditions of rapid perception, for example scanning packs while walking along the aisle in a supermarket, the positioning of the elements in a pack design make the difference between identifying and missing the item concerned. (Brewer, 2000)

Because of this words should be on right-hand sides of packs, and pictures should be on the left.

References
Brewer, R. R. (2000). The verbal and visual components of package design. The Journal of Product and Brand Management, 56-70.