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Online forums are fueling demand for so-called study medicines, which are usually prescribed for patients of ADHD. The number of ADHD patients peak in November when the nation's college entrance exam is held every year. ADHD medication stimulates neurotransmitters to regulate concentration in the brain. But in normal people, there is no change. In fact, in normal people there may be side effects, which include dizziness, headaches, depression and hallucinations.
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