The D.E.A. is increasing its quota for Vyvanse as patients still struggle to fill prescriptions. The D.E.A. is increasing its quota for Vyvanse as patients still struggle to fill prescriptions. Drugs (Pharmaceuticals), Shortages, Attention Deficit Hyperactivity Disorder, Drugstores, Ritalin (Drug), Adderall (Drug), Generic Brands and Products NYT > Science