I blame doctors and nurses. At least the ones I personally know tell patients "Advil" and "Tylenol" and never mention ibuprofen or acetaminophen. Actually, it's true for pretty much all OTC medications - they just use the branded names Immodium, not loperamide. Claritin. Zyrtec. Benadryl. Dramamine (drowsy/non-drowsy). The list goes on.

When asked, they always tell me one of two things:

1. They were trained on these names instead of the ingredient (scary!)

2. They want the "easiest" thing for the patients (i.e. so they don't have to look at the label).