Main results 14 RCTs (1379 participants, 42% in 1 RCT) met the selection criteria. The quality of study methods was low (mean quality score 2.3 out of 5). Behaviour symptoms: methylphenidate was superior to placebo in 4 of 6 RCTs and to thioridazine in 1 RCT and was equivalent to imipramine in 1 RCT. Medication management was equivalent to combined medication and behavioural intervention; both ...