What undoubtedly benefits a small number of children with specific problems, such as hyperactivity, can all too easily become an instant, cheap cure-all for youngsters who may be misbehaving because they are bored, miserable, badly nourished or for any other reason.
The advice also stresses the need to make sure that children take medicine for conditions such as attention deficit hyperactivity disorder or for behavioural problems on the trip.
Many are concerned that Ritalin and similar drugs, which aid concentration in those with Attention Deficit Hyperactivity Disorder, are chemical straightjackets that prevent children from taking full responsibility for themselves.