Many medication manufacturers offer a discount card for patients who don’t have insurance or have insurance that covers little to none of the cost. It doesn’t look like Shire offers it for Adderall, but they do for Vyvanse, which is the same type of stimulant: https://www.shire.com/patients/patient-services/shire-cares.
There are more possible options in this article:
These Prescription Assistance Programs May Help You Save Money on ADHD Medication
Penny
ADDitude Community Moderator, Parenting ADHD Trainer & Author, Mom to teen w/ ADHD, LDs, and autism