“Addderall is speed," Dr. Phil says. "When you take it a long time, it starts tricking your brain." 

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In the video above, he explains what can happen to your brain.
 
On Tuesday’s episode, Dr. Phil speaks with Morgan, who claims that she has been taking Adderall for 15 years, at the prescribed dose. Her mother, Liz, claims she has an addiction to the medication, takes it in excess, hears voices, and speaks incoherently when she takes it to excess. Watch more here.