Adderall vs Vyvanse
Adderall (amphetamine salts)
Stimulants
VS
Lisdexamfetamine (Vyvanse)
Stimulants
Adderall (mixed amphetamine salts) and Vyvanse (lisdexamfetamine) are the two most-prescribed ADHD stimulants in the US. Both are amphetamines. The difference is the delivery system: Vyvanse is an inactive prodrug that only works after your body processes it.
Adderall vs Vyvanse — side by side
| Adderall | Vyvanse | |
|---|---|---|
| What it is | Instant mix of four amphetamine salts; IR and XR | Lisdexamfetamine — an amphetamine bonded to an amino acid |
| How it turns on | Active immediately; XR releases in two waves | Inert until liver enzymes cleave it — smooth, ~1–2 h ramp |
| Duration | IR 4–6 h; XR 10–12 h | 10–14 h, very consistent |
| The 'feel' | Faster, punchier onset — more noticeable lift | Smoother ramp-up and comedown; fewer peaks and crashes |
| Abuse potential | High — snorting or high doses hit hard | Lower — can't be sped up by crushing; it's a prodrug |
| Crash | Notable drop as it wears off | Gentler landing, though still real |
| Price & legal | Schedule II (US); generics cheap; heavily diverted | Schedule II (US); patent expired 2023, generics arrived |
The verdict
Clinically they're near-twins — head-to-head trials show similar symptom control. The practical differences: Vyvanse's prodrug design makes it harder to abuse (it can't be snorted or injected for effect) and gives smoother all-day coverage; Adderall's faster onset suits people who need immediate effect and offers cheaper generics. Both raise heart rate and blood pressure, both kill appetite and sleep, and both are Schedule II for a reason.
?Frequently asked questions
Is Vyvanse stronger than Adderall?
Not per milligram — but 30 mg Vyvanse converts to about 9 mg dextroamphetamine over the day. The real difference is how evenly it's delivered, not raw strength.
Which is harder to abuse?
Vyvanse, by design. As a prodrug it can't be made to act faster — snorting it just delays absorption. Adderall can be crushed and used immediately.