"And, with generic drugs there may not be a whole lot of profit, so they're not a priority," he added.
Along with discussing the shortage with your child's doctor, Adesman suggested that parents can call or write the FDA, or a local government representative, and let them know that they're having trouble getting necessary medication.
"Patient advocacy is always important," he said. "It's the squeaky wheel that gets the grease."
Learn more about medications used to treat attention-deficit/hyperactivity disorder from the U.S. National Institute of Mental Health.
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