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ADHD Medication - Finding the Right One Finding the right ADHD medication requires a lot of trial and error. Many factors affect effectiveness and efficiency, including the individual's metabolism, the effects of the drug and how a medication interacts with other medications and supplements. It takes a bit of time for stimulants' effects to be felt however they can improve focus, attention and impulsivity. They also boost levels of brain chemicals, such as dopamine and epinephrine. Stimulants The stimulants, also