It is a frequent paradox that the more common a condition, the less impressive the evidence-base for its management. A good example is functional abdominal pain (FAP), one of the most common problems we see in our clinics. A team from The Netherlands undertook a systematic review to examine the evidence for drug treatments in children aged 4 to 18 years (Korterink J, et al. J Pediatr 2015;166:424–31). They found much written on the subject, but little hard evidence. From over 300 papers, they …