What is the difference in adderall and adderall XR?

Answer:
adderall comes in 2 forms, an instant release(IR) and extended release(xr). the instant release works faster but doesnt work as long and is typically taken multiple times a day over the course of the day and the xr is typically taken once in the morning and releases the drug slowly into your system as it breaks down in your stomach.. Its a matter of preference i guess or what your doc thinks is best for you.
First answer by Ktgator. Last edit by Ktgator. Contributor trust: 0 [recommend contributor recommended]. Question popularity: 2 [recommend question].