Amphetamine salts and Adderall are the same medication. “Amphetamine salts” (sometimes listed as “mixed amphetamine salts” or “amphetamine salts combo”) is simply the generic name for Adderall. When your pharmacy gives you a bottle labeled “amphetamine salts,” you’re getting the FDA-approved generic equivalent of brand-name Adderall with the same active ingredients in the same proportions.
What’s Inside Both Medications
Adderall and its generic contain four amphetamine salts blended together: dextroamphetamine saccharate, amphetamine aspartate monohydrate, dextroamphetamine sulfate, and amphetamine sulfate. These four salts combine two forms of amphetamine, known as the “d” (dextro) and “l” (levo) forms, in a 3-to-1 ratio favoring the d form. That ratio is identical whether you’re taking brand-name Adderall or the generic version.
The “d” form is the more potent of the two at improving focus and attention. The “l” form contributes as well but has a slightly different activity profile. Mixing all four salts together was the original design of Adderall, and generic manufacturers must replicate that exact combination to earn FDA approval.
How Generics Get Approved
Before a generic version of Adderall can be sold, the manufacturer must prove bioequivalence to the brand-name product. This means running a study showing that the generic delivers both d-amphetamine and l-amphetamine into the bloodstream at the same rate and to the same extent as brand-name Adderall. The FDA requires the results to fall within a tight statistical window, confirming that the two products behave the same way in your body.
In practical terms, a generic that passes this test will produce the same therapeutic effect at the same dose. Your doctor doesn’t need to adjust anything if you switch between brand and generic.
What Can Differ Between Brand and Generic
The active ingredients are identical, but the inactive ingredients are not. Brand-name Adderall tablets contain lactitol, microcrystalline cellulose, colloidal silicon dioxide, and magnesium stearate, along with color additives that vary by dose. The 7.5 mg and 10 mg tablets use a blue dye, while higher doses like 12.5 mg, 15 mg, 20 mg, and 30 mg use a yellow-orange dye. Generic manufacturers choose their own fillers, binders, and dyes.
For most people, these differences don’t matter. But if you have a sensitivity or allergy to a specific dye, gluten, or lactose-based filler, it’s worth checking the inactive ingredient list on your specific generic. Occasionally, people report that one manufacturer’s generic “feels different” from another. This is usually traced to slight variations in how quickly the tablet dissolves or to individual sensitivity to an inactive ingredient, not to a difference in the amphetamine itself.
IR vs. XR: Both Come in Generic
Adderall exists in two formulations, and both have generic equivalents. The immediate-release (IR) version is an uncoated tablet that dissolves quickly in the stomach, typically lasting four to six hours. The extended-release (XR) version is a capsule filled with coated beads. About half the beads break down shortly after reaching the stomach, and the remaining beads dissolve roughly four hours later in the intestines. This two-phase release extends the effect to around 10 to 12 hours.
When your prescription says “amphetamine salts” or “mixed amphetamine salts,” it refers to the IR tablet. The XR generic is usually labeled “amphetamine salts XR” or “mixed amphetamine salts extended-release.” Make sure you know which one your prescription calls for, since they’re dosed differently and aren’t interchangeable.
Why Your Pharmacy Dispenses the Generic
Unless your prescriber writes “brand name medically necessary” or “dispense as written,” most pharmacies will automatically fill your Adderall prescription with the generic amphetamine salts version. This is standard practice for all medications with approved generics, and it’s driven largely by cost. Brand-name Adderall can cost significantly more than the generic at retail price without insurance, though the exact savings depend on the dose and pharmacy.
If you’ve been stable on a particular manufacturer’s generic and your pharmacy switches to a different manufacturer (which happens when their supplier changes), you may notice the pills look different. The medication inside is still the same four amphetamine salts at the same dose. If you feel the switch affected you, you can ask your pharmacist to order from the previous manufacturer or talk to your prescriber about specifying one.
The Short Version
Amphetamine salts is Adderall. One is the generic name, the other is the brand name. They contain the same four active compounds in the same 3-to-1 ratio, must meet the same FDA bioequivalence standards, and are prescribed for the same conditions at the same doses. The only meaningful differences are the inactive ingredients and the price tag.