How much methylphenidate or dexamphetamine will a child with adhd normally need to take?

Variable: The proper dose of add/adhd medications is completely unique for each child. There is no accurate standard dose that fits all and unfortunately much trial and error is often necessary for proper adjustment due to each child's different metabolism.

Individual: Adhd: clinical practice guidelines for the diagnosis, evaluation and treatment of children and adolescents with attention-deficit/hyperactivity disorder were updated on october 16, 2011 to specify that the dose of medication must be titrated to achieve normality in every individual, adverse effects being the only limiting factor.

Not predictable: Every child/person is different. I always "start low & go slow" titrating the dose until it is a fit. My experience is that doses have almost nothing to do with age, weight, or even severity of add. Rather they are treating that person's unique neuro-chemistry and the person's specific challenges & situations. Some very small, very hyperactive kids metabolize meds very quickly, needing huge doses.