Does dexmethylphenidate have any advantages over methylphenidate?

Dexmethylphenidate contains the d-enantiomer of methylphenidate. It is not a new medication; it was approved by the FDA in 2001 and is now generic in the US. Similar improvement in sustained attention was found with dexmethylphenidate and equivalent doses of methylphenidate, but not with l-methylphenidate (Srinivas et al 1992). So, it was concluded that the…