I made a few small mistakes when I started working but honestly not even 1 after a few months of working there. You get so used to it that you can tell what a medication is without the package. We often had stray pills that fell out and I could identify them all just by look. We were not allowed to use the meds that were not in packages for patients but since we all knew exactly what they were, we put them in our first aid kit at work.
A stockfile is the record of all products that are in the pharmacy. When we receive an item it is captured on the computer system.
As a pharmacist you can then type in the name of any medication and the stockfile will show how many of that item are in store. Does this help?
So if you go back and say they gave you less they can check.
For example if they type in Vicodin and the stockfile says there are 500 Vicodin's in store but there are actually 510 then they can see you didn't receive your meds.
We did stocktaking once a month. Physically counted each pill and capsule by hand. Once a week assistants would also count as much as possible to double check amount.
Pain in the behind
This is why I no longer work in a pharmacy, very stressfull and loads of responsibility!
You have to make sure to give all the right meds, read scripts from Dr's that sometimes write so badly that you can't tell what meds to give, mix liquid antibiotics and meds that come in powder form with distilled water and make sure you get the quantities just right. Make sure you don't use measuring jugs that are meant for toxic fluids, check patient allergies so you don't kill anyone and the list goes on!!!