One Bottle at a Time

Was counselling a parent on paracetamol (aka Panadol) for his child today. Almost wanted to vomit blood. The child was given 2 bottles of paracetamol and just to inform the parent I told him the 2 bottles contain the same medicine. He then asked me was whether he is to feed the child from both bottles. DUH! SAME MEDICINE! Who in the world with common sense would feed the child from both bottles when you've been told they are the same medicine?! You obviously feed from one bottle first, finish the first bottle then open the next one.