A pharmaceutical order filling system receives pharmaceutical orders and uses a loading device to label containers and load the labeled containers onto a pallet. The loading device is configured with at least one container drop assembly that receives containers to be labelled and loaded onto the pallet and that is in communication with a label assembly configured to print and apply labels to the containers. The loading device also includes at least one loading rotary wheel configured to receive the labelled containers and hold the labelled containers in a pick position to be moved from the pick position to a predetermined position on the pallet. The loading device may be configured to accommodate multiple sizes of containers and to consolidate multiple sizes of labelled containers into a single loading rotary wheel for loading onto the pallet.
