I knew you were that smart...
hope you don't mind me suggesting it.
It came to mind, me thinking of the pill we found on my mom's floor, which turned out not to be one of her prescriptions. Mislabeling medications does happen. Horrible to think that happens, but it does.
My dad use to administer his own meds. He had seventeen diff. 'scripts at one point in time. I use to be the 'pick-up and delivery' for him, even though he lives immediately across the highway from his pharmacy. One particular pill changed shape and color twice while I was involved with his care. I asked him once if he made sure each pill he took was what he expected it to be. He said he was very cautious, and aimed his eyes at me with his head still lowered, as if he was going to say more, but didn't. (We had cause to question him for another reason.) According to him, he consulted the pharmacist before taking them when he had doubts. At that, I dropped the conversation. His meds are administered by a sister now.