Manufacturers are struggling to meet the demand for Adderall even as prescriptions for the drug increase.
Adderall is one of several medications used to fight ADHD and its demand is at an all-time high.
The shortage is in part due to the fact that Adderall's active pharmaceutical ingredient, mixed amphetamine salt, is an addictive stimulant and therefore subject to federal regulations on its distribution.
The DEA authorizes only a certain amount of the salts based on projected need.
But there's been a spike in Adderol persrciptions between 2009 and 2011.
Many orders remain unfilled and it may take months for updated projections of need to translate into increased distribution.