Walgreens pharmacies misfilled prescriptions are mentioned 8-15-03 and discussed at my firm site Walgreens misfills prescriptions. I was contacted recently by an investigator in Albuquerque, New Mexico investigating Walgreens methods for pharmacists tracking and filling prescriptions. Curious, I googled and found this article Injured Boy's Family Blames Walgreens: Associated Press, discussing the lawsuit of a brain-damaged boy who negligently received methadone instead of the anti-hyperactivity drug Ritalin a/k/a Methylphenidate.
See how the error happened - methadone, methylphenidate - its pharmacist or technician royally screwed up. And it isn't the first time for Walgreens. One of the cases I had was very similar!