immediate-release version (Adderall IR) and extended-release version (Adderall ER).
The effects of Adderall IR last for around 4-6 hours, and the effects of Adderall XR last for around 12 hours. Both versions of the drug are categorized by the DEA as Schedule II controlled substances.
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The effect of the side effects of both versions of the drug depends on the metabolism of the person taking the drug which may differ from person to person.
The IR version of the drug is manufactured as a tablet, and the XR version comes in capsule form.
The IR version of the drug is more likely to be abused. Because people taking the drug in tablet form can grind up the tablets and snort the powder.
On the other hand, the XR version consists of a number of little beads in the capsules. That would need to be individually ground up, and this makes it harder to prepare the drug for snorting.