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ADHD and Growth

Parents have long heard warnings that medication for attention deficit hyperactivity disorder (ADHD) will "stunt" their child's growth. More accurately, medication may slow growth, which must be considered when deciding to start a child on stimulant medication for ADHD.

  1. A Misnomer

    • A term used too freely, stunted growth applies to children whose rate of growth falls significantly below that of their peers, typically due to malnutrition or another medical condition. They are usually in the bottom three to five percent for height and weight (though some children will fall there naturally).

    Growth on Immediate-Release Methylphenidate (Ritalin)

    • In a study by the National Institute of Mental Health, growth slowed for children on medication, with an average difference after three years of three-fourths of an inch less than their non-medicated peers, though growth rates had normalized.

    Growth on Transdermal Patch

    • In another study, growth of children wearing a methylphenidate patch also slowed, consistent with other studies. This effect lessened over time and was most apparent during the initial year of treatment.

    Growth on Extended-Release Methylphenidate

    • A study of children on extended-release methylphenidate found that over 21 months, the difference between actual and expected height was less than one-tenth of an inch.

    Weigh the Risks

    • Before making a decision to medicate your child, become informed. Be sure to consider all the risks and benefits. If you opt for medication, have your doctor closely monitor your child's height.

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