What Is Lisdexamfetamine? Uses, Dosage, and What You Need to Know in 2026

Lisdexamfetamine Is a Prescription Stimulant Used to Treat ADHD and Binge Eating Disorder

Lisdexamfetamine Dimesylate is a long-acting CNS stimulant medication best known by the brand name Vyvanse. It is FDA-approved to treat Attention Deficit Hyperactivity Disorder (ADHD) in patients aged 6 and older and moderate to severe Binge Eating Disorder (BED) in adults.

This guide covers everything you need to know about Lisdexamfetamine in 2026 — from how it works to what it costs and how to get it.

What Is Lisdexamfetamine?

Lisdexamfetamine is a prodrug, meaning it's inactive until your body converts it into its active form — Dextroamphetamine (d-Amphetamine). This conversion happens after you swallow the medication, which gives it a smoother onset and longer duration compared to immediate-release stimulants.

Key facts about Lisdexamfetamine:

• Brand names: Vyvanse, Arynta
• Generic name: Lisdexamfetamine Dimesylate
• Drug class: CNS Stimulant, Amphetamine Prodrug
• Manufacturer (brand): Takeda Pharmaceuticals
• Generic manufacturers: Teva, Sandoz, Amneal, Mylan, and many others
• FDA approval: Originally approved in 2007 for ADHD; approved for BED in 2015
• DEA schedule: Schedule II (CII) — high potential for abuse and dependence
• Generic available: Yes, as of August 2023

For a detailed explanation of how the medication works in your body, see our mechanism of action guide.

What Is Lisdexamfetamine Used For?

ADHD (Ages 6 and Older)

Lisdexamfetamine is one of the most commonly prescribed medications for ADHD. It helps improve attention, focus, and impulse control by increasing levels of dopamine and norepinephrine in the brain. It's approved for both children (6+) and adults.

Binge Eating Disorder (Adults)

Lisdexamfetamine is the first and only FDA-approved medication for moderate to severe BED in adults. It helps reduce the number of binge eating days per week. It is not approved for weight loss.

Off-Label Uses

Some doctors prescribe Lisdexamfetamine off-label for treatment-resistant depression (as an augmentation strategy) and excessive daytime sleepiness, though these uses are not FDA-approved.

How Is Lisdexamfetamine Taken?

Lisdexamfetamine comes in two forms:

• Oral capsules: 10 mg, 20 mg, 30 mg, 40 mg, 50 mg, 60 mg, and 70 mg
• Chewable tablets: 10 mg, 20 mg, 30 mg, 40 mg, 50 mg, and 60 mg

Dosing guidelines:

• Take once daily in the morning with or without food
• Starting dose for ADHD: 30 mg/day
• Starting dose for BED: 30 mg/day
• Maximum dose: 70 mg/day
• Capsules can be swallowed whole or opened and mixed with water, yogurt, or orange juice
• Chewable tablets should be chewed completely before swallowing
• Avoid taking in the afternoon or evening to prevent insomnia

Your doctor will typically start at 30 mg and increase the dose in 10–20 mg increments at weekly intervals until the right balance of effectiveness and side effects is found.

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Who Should Not Take Lisdexamfetamine?

Lisdexamfetamine is not safe for everyone. You should not take it if you have:

• A known allergy to Amphetamine products
• Used an MAO inhibitor within the past 14 days
• Advanced arteriosclerosis or symptomatic cardiovascular disease
• Moderate to severe hypertension
• Hyperthyroidism
• Glaucoma
• A history of drug abuse
• Agitated states

Tell your doctor about all your medical conditions and medications before starting Lisdexamfetamine, including any potential drug interactions.

Common Side Effects

The most frequently reported side effects include:

• Decreased appetite
• Insomnia
• Dry mouth
• Headache
• Nausea
• Irritability
• Anxiety
• Weight loss
• Increased heart rate

For a complete breakdown of side effects and when to seek medical attention, read our side effects guide.

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How Much Does Lisdexamfetamine Cost?

Cost varies widely depending on whether you use insurance, coupons, or pay cash:

• Brand Vyvanse (retail): $300–$400/month
• Generic Lisdexamfetamine (retail): $200–$360/month without discounts
• Generic with coupons (GoodRx, SingleCare, etc.): As low as $60–$70/month
• With insurance: Copays typically $20–$75/month, though prior authorization is often required

Some insurance plans require step therapy — meaning you may need to try Methylphenidate (Concerta, Ritalin) before they'll cover Lisdexamfetamine. If cost is a concern, our complete savings guide covers every option available.

Final Thoughts

Lisdexamfetamine is a well-established, effective medication for ADHD and Binge Eating Disorder. With generics now widely available, it's more accessible and affordable than ever — though the ongoing shortage can still make it hard to find.

If you need help locating Lisdexamfetamine at a pharmacy near you, try Medfinder to check real-time stock. And if you're looking for a prescriber, our guide to finding a doctor can help.