Adderall vs Vyvanse for adults: how they compare

Adderall and Vyvanse are both amphetamine medicines, and both are approved by the FDA for ADHD in adults. People compare them because they are prescribed for the same reason yet are built very differently. Adderall is a mix of four amphetamine salts that are active as soon as they are absorbed. Vyvanse (lisdexamfetamine) is a prodrug: the capsule or chewable tablet contains an inactive compound that the body converts into dextroamphetamine. This page compares them using the current FDA labels and the largest published analyses of adult trials, as of October 2026.

"Adderall" can mean two products: immediate-release tablets and Adderall XR extended-release capsules. Where the two differ, the table says so. A separate page compares Adderall IR and Adderall XR directly.

Side by side

The main difference: how the amphetamine reaches the body

Adderall XR capsules hold two types of beads. According to the label, immediate-release and delayed-release beads together "prolong the release of amphetamine compared to the ADDERALL (immediate-release) tablet." The IR tablet is short-acting, and its label describes a first dose on waking with additional doses spaced through the day.

Vyvanse works differently. The FDA label states that lisdexamfetamine "is a prodrug of dextroamphetamine." The medicine has to be converted in the body before it acts, which is how it provides a long-acting, once-daily effect without a bead system. That is also why the capsule can be opened and dissolved in a drink without changing how it is meant to work, something the label allows.

A prodrug design does not remove the risk of misuse. Since the FDA's class-wide update on May 11, 2023, every prescription stimulant label, Vyvanse included, carries the same boxed warning about abuse, misuse and addiction. Both labels tell prescribers to assess each patient's risk before prescribing and to keep reassessing during treatment.

What the research says about these two in adults

A large head-to-head trial comparing Adderall with Vyvanse in adults was not found for this guide. Most of the evidence compares each medicine with placebo.

• Network meta-analysis, 2018. Cortese and colleagues pooled 133 double-blind trials in the Lancet Psychiatry. They grouped "amphetamines (including lisdexamfetamine)" together. In adults, amphetamines reduced clinician-rated ADHD symptoms more than placebo at about 12 weeks, and in head-to-head comparisons amphetamines came out ahead of methylphenidate, atomoxetine and modafinil on efficacy. Amphetamines were also less well tolerated than placebo in adults, meaning more people stopped because of side effects.
• Lisdexamfetamine analyzed separately. In a post-hoc analysis, the same authors separated lisdexamfetamine from the other amphetamines. In adults, the tolerability estimates differed somewhat between the two groups, but the confidence intervals were wide and overlapping, so the analysis does not show that one is clearly easier to take.
• A trial inside the Vyvanse label. One classroom study in children aged 6 to 12 included Adderall XR, Vyvanse and placebo. The label reports Vyvanse against placebo, not against Adderall XR, so it does not settle which works better.

The UK's NICE guideline (NG87) recommends lisdexamfetamine or methylphenidate as first-line medication for adults with ADHD. Mixed amphetamine salts are not part of that UK recommendation, while US reviews such as American Family Physician (2024) say clinical guidelines recommend a subset of amphetamine and methylphenidate stimulants as first-line for adults. Guidelines describe a starting point for a population. They do not predict how one person will respond. The article does ADHD treatment work in adults? explains what these effect sizes mean.

Practical differences people notice

• Swallowing. Both Adderall XR and Vyvanse capsules can be opened according to their labels. Vyvanse also comes as a chewable tablet.
• Other conditions. Vyvanse is the only one of the two approved for binge eating disorder in adults. Adderall IR is the only one approved for narcolepsy.
• Interactions. Both labels say alkalinizing agents (such as some antacids or sodium bicarbonate) raise amphetamine blood levels and acidifying agents lower them. Both are contraindicated with MAOIs or within 14 days of stopping one. The drug interactions page lists more.
• Heart and blood pressure. Both labels advise avoiding use in people with serious heart disease and monitoring blood pressure and pulse. See ADHD medication, heart health and blood pressure.
• Supply. As of October 19, 2026, the FDA shortage database lists lisdexamfetamine capsules and chewable tablets and mixed amphetamine salts IR tablets as current shortages. What to do when your pharmacy is out of stock covers the lawful options.

Cost depends on the generic, the plan and the pharmacy. What ADHD medication costs in New York explains how to check. The individual drug pages, Adderall XR for adults and Vyvanse for adults, go further into each label.

New York and New Jersey rules that apply to both

Both medications on this page are Schedule II controlled substances, so the same prescription rules apply to either one. In New York, a Schedule II prescription cannot be refilled; when more medication is needed, the prescriber issues a new prescription (10 NYCRR 80.67). New Jersey's controlled dangerous substance rules also bar refills of Schedule II prescriptions (N.J.A.C. 13:45H-7.9). Supply limits, the 30-day window to fill, electronic prescribing and the monitoring-program checks are covered in New York's rules for ADHD stimulant prescriptions and New Jersey's rules for ADHD stimulant prescriptions. Switching from one stimulant to another does not change any of these rules.

Questions worth asking

• Is a once-daily medicine or a shorter-acting one a better fit for my workday and sleep?
• Given my heart health, blood pressure and other medicines, are there reasons to prefer one?
• Do I have a history (personal or family) that changes the misuse risk discussion?
• If the pharmacy cannot fill one of these because of a shortage, what is the plan?
• How will we judge whether the medicine is working, and when?

Talking it through with a prescriber

Dr. Shershow is a psychiatrist who focuses on adult ADHD and is licensed in New York and New Jersey. After an adult ADHD evaluation, he discusses the treatment options that fit, including medication when it is appropriate, and follows up over time. The comparison above is general information from FDA labels and published research. It is not advice to start, stop or switch any medication, and neither drug is the right choice for everyone.