This is how we dealt with my Dad taking pills too. We realised last Easter he was unable to manage anymore (he takes various things for various ailments, one of which is slow release pain medication taken twice 12 hours apart - nightmare for someone with memory problems!)
To begin with we got a simple 7 day box from Boots which I filled for him with the right pills in the right compartments (4 per day but we only needed 2).
By Christmas we realised this wasn't working any longer - he would forget to take them, or take them at the wrong times. We decided to invest in a locked pill box which sounds an alarm at the time he has to take them and it just moves round one slot at a time to dispense the medication needed at that time. This has worked brilliantly, it wasn't cheap but worth every penny. However, my Dad does also have Carer visits in place and timed to coincide with the pill box alarm so they can still prompt him too.
It was suggested to me that the Chemist would set up a blister pack or pill box for him, but that doesn't help when he couldn't remember when to take them or what day it was. The alarmed box plus a carer were the key for him.