This all hinges on the use of “hypochondria” and whether or not this child is really a hypochondriac or it is being used loosely to convey a point. Hypochondria is a real disorder, a somatoform disorder and what this child is feeling may very well be real.
If this child truly is a hypochondriac, as described in the DSM-IV-TR, then a placebo is likely going to be only a temporary solution, if that. When you are experiencing physical symptoms it is hard for anyone, and especially a child to believe there is nothing wrong with them. There could be any number of triggers or causes or none at all. Until the individual realizes for themselves their thoughts are not rational, all the dextrose tabs in the world aren’t going to help. It can be very stressful, life altering and debilitating to those who suffer from this disorder. If “hypochondriac” is being used loosely here, that is different, and this lady is just wanting to make some money from parents with spoiled children. If hypochondriac was intended as clinical then the whole premise is absurd and could possibly do as much harm as good.
You hit the nail on the head here.
Hypochondria in children is usually defined as, “wants a day off from school”.