Finding the Best ADHD Medication For Adults Stimulants, such as methylphenidate (Ritalin) or amphetamine (Vyvanse), work quickly to boost and balance levels of brain chemicals. These drugs can trigger weight fluctuations, tics, and sleep problems in some people. <img width="423" src="https://static.wixstatic.com/media/8851d4_7b4e91ad611a4ab1b567ccb4144f37ee~mv2.jpg/v1/fill/w_29
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