Actually, this is REALLY recent stuff from the NHS - I was told just in January it was OK to use calpol and baby neurofen at the same time (ie a spoon of one and then a spoon of the other); by the July it was one OR the other, not both, if you give one don't give the other for four hours... but if you're not interested in keeping up with research (ie you're actually telling people what to do every day) then it's likely you won't have heard about that. NHS direct is often at least a year ahead of the rest of the NHS anyway.