An acquaintance, "Mata" phoned and told me something she did that was embarrassing to her--she was abashed to have made such a mistake.
Mata takes a Glucophage pill morning and evening for diabetic control. She also has in her medication drawer a bottle of Soma pills, a muscle relaxant, that she takes only when she has back spasms. Generic Soma and Glucophage look alike--they are both the same sized round white pills.

This morning when she checked her blood sugar, it was higher than usual. She then did have the presence of mind to take a good look at her medication and realized for the past two days she had been taking Soma instead of Glucophage.
She had slept well, because the Soma causes drowsiness, but her blood sugar was about to get out of control. Mata is a nurse; she said How could I not have noticed??

There was a case on Dr. G Medical Examiner about a pharmacist that had filled a prescription wrong. A teenage boy had been prescribed Ritalin, but the pharmacist had filled the Rx with Methadone. Both pills looked the same and had similar markings, and the parents unwittingly gave the wrong pills to their son even as he gradually became stuporus and died.

Mistakes can be made by anybody; be aware of any change in the appeaance of your generic meds and don't be shy in asking questions at the pharmacy.
Mata learned a lesson--she wrote with a Sharpie pen across the label "Soma" and put the bottle in another drawer.
I'm not being preachy, but you have to be vigilant about generics--actually of any prescribed drugs.

susil