Dexmethylphenidate, sold under the brand name Focalin among others, is a medication used to treat attention deficit hyperactivity disorder in those over the age of 5 years. If no benefit is seen after 4 weeks it is reasonable to discontinue its use. It is taken by mouth. Wikipedia
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Other names: d-threo-methylphenidate (D-TMP)
Elimination half-life: 4 hours
Dependence liability: Physical: None Psychological: High