Description
What Is in Vyvanse? Active Ingredient, Inactive Ingredients, and Full Formulation Guide in 2026.
What Is in Vyvanse?
Vyvanse contains one active ingredient: lisdexamfetamine dimesylate — a synthetic prodrug compound formed by bonding the amino acid L-lysine to dextroamphetamine. The capsule also contains a small number of inactive pharmaceutical excipients. The active ingredient itself has no pharmacological effect until enzymes in your red blood cells cleave the lysine molecule, releasing dextroamphetamine — the compound responsible for every therapeutic and side effect you experience.
Why This Matters
Knowing exactly what is in Vyvanse matters for several practical reasons: understanding why it works the way it does, identifying whether any ingredients could cause an allergic or intolerant reaction, comparing it accurately to other ADHD medications, and recognising what a drug screen is actually detecting when it returns a positive result. Patients who understand the formulation make better-informed decisions with their prescribers.
What You Need to Know First
Vyvanse is available in two physical forms in some markets: oral capsules and chewable tablets. In Australia, the TGA-approved form is the oral capsule, available in six strengths: 20 mg, 30 mg, 40 mg, 50 mg, 60 mg, and 70 mg. Each strength contains a different quantity of lisdexamfetamine dimesylate as the active ingredient, with the inactive excipients remaining consistent across strengths.
The capsule contents — a fine powder — can be swallowed whole, or the capsule can be opened and its contents dissolved in water, orange juice, or mixed into yoghurt for patients who have difficulty swallowing capsules. Importantly, the active ingredient is fully water-soluble, and the powder should be consumed immediately after mixing — not stored.
Quick Answer Overview
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Active ingredient: Lisdexamfetamine dimesylate
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Active metabolite (after conversion): Dextroamphetamine
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Conversion agent: L-lysine (released as a non-active amino acid upon conversion)
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Key inactive ingredients: Microcrystalline cellulose, croscarmellose sodium, magnesium stearate
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Capsule shell: Gelatin with colour-coded dye system by dose strength
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Available forms in Australia: Oral capsules (20–70 mg)
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Dose-specific active ingredient content: Each mg of dose listed = mg of lisdexamfetamine dimesylate
The Active Ingredient: Lisdexamfetamine Dimesylate
What It Is
Lisdexamfetamine dimesylate is the active ingredient in every Vyvanse capsule. It is a synthetic molecule created by chemically bonding two naturally occurring components:
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L-lysine — one of nine essential amino acids the human body cannot produce on its own and must obtain from food (found in meat, eggs, dairy, legumes)
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Dextroamphetamine — a potent CNS stimulant and the pharmacologically active component ultimately responsible for Vyvanse’s effects
The dimesylate refers to the methanesulfonate salt form used to stabilise the compound for pharmaceutical manufacturing and improve its solubility and bioavailability within the capsule.
The Chemical Name
The IUPAC chemical name for lisdexamfetamine reflects its structure precisely. Its International Nonproprietary Name (INN) — “lisdexamfetamine” — is literally a contraction of L-lysine-dextroamphetamine, making the ingredient’s composition explicit in its very name.
What Lisdexamfetamine Is NOT
In its intact form inside the capsule, lisdexamfetamine is pharmacologically inert. It has no stimulant effect, no dopaminergic action, and no therapeutic benefit until enzymatic conversion occurs in the bloodstream. This is the defining feature of Vyvanse’s formulation — and the reason it behaves so differently from every other amphetamine-class medication.
How the Active Ingredient Becomes Active
After you swallow a Vyvanse capsule, the lisdexamfetamine is absorbed intact through the gastrointestinal tract into the bloodstream. Once in the blood, peptidase enzymes in red blood cells perform a hydrolysis reaction — breaking the amide bond between L-lysine and dextroamphetamine.
This releases two products:
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L-lysine — the amino acid portion, which is metabolised normally by the body as a dietary amino acid. It produces no drug effect.
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Dextroamphetamine — the active stimulant, which crosses the blood-brain barrier and produces the therapeutic effects on dopamine and norepinephrine signalling.
The conversion rate is enzymatically governed — biologically capped — which means the speed and peak concentration of dextroamphetamine entering the brain cannot be accelerated by taking more capsules, crushing the powder, or dissolving it differently. This is the mechanism behind Vyvanse’s smoother effect profile and lower misuse potential compared to active amphetamine formulations.
The Inactive Ingredients in Vyvanse Capsules
Inactive ingredients — also called excipients — are the non-active components of the capsule that serve pharmaceutical purposes: binding the powder, aiding capsule filling, stabilising the formulation, and controlling consistency.
The TGA-approved Australian Vyvanse capsule product information lists the following inactive ingredients:
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Microcrystalline cellulose — a finely powdered cellulose used as a filler and binder in capsule formulations; derived from plant cell walls; generally regarded as inert and well-tolerated
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Croscarmellose sodium — a disintegrant that helps the capsule contents disperse when dissolved in liquid or digested; a sodium salt of carboxymethylcellulose
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Magnesium stearate — a lubricant used in capsule manufacturing to prevent the powder from sticking to equipment; a magnesium salt of stearic acid found naturally in many foods
The Capsule Shell
The gelatin capsule shell itself is colour-coded by dose strength, with the body and cap of each capsule printed with “S489” and the dose amount in black ink. The gelatin is of standard pharmaceutical grade. Patients with strict vegetarian or vegan dietary requirements should be aware that pharmaceutical gelatin is typically derived from animal collagen — this is a common feature across most hard-gelatin capsules, not unique to Vyvanse.
What Vyvanse Does NOT Contain
Understanding what Vyvanse does not contain is as useful as knowing what it does:
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No levoamphetamine — unlike Adderall, which contains a 75%/25% mix of dextroamphetamine and levoamphetamine, Vyvanse converts exclusively to dextroamphetamine. The absence of levoamphetamine is one reason Vyvanse’s cardiovascular side effects are considered slightly more predictable than mixed-salt amphetamines
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No extended-release beads or timed-release coatings — Vyvanse contains no dual-bead, polymer-coated, or timed-release delivery technology. The extended effect comes entirely from the biological conversion rate, not from pharmaceutical engineering of the capsule itself
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No artificial preservatives — the formulation is a dry powder with pharmaceutical excipients only; no preservative additives are present
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No sugar, lactose, or gluten — the inactive excipient list does not include common allergens such as lactose or gluten-containing starch, though patients with severe sensitivities should confirm with their pharmacist or the current CMI
How Does the Formulation Compare to Other ADHD Medications?
The most significant formulation difference across this table is the mechanism of extended action. Adderall XR uses physical bead technology; Concerta uses an osmotic pump; Vyvanse uses biological enzymatic conversion. The practical result is that Vyvanse’s extended duration cannot be manipulated by altering the physical form of the capsule — a clinically important distinction.
Practical Considerations: How to Take Vyvanse Given Its Ingredients
Because the active ingredient is water-soluble and the inactive excipients are simple pharmaceutical fillers, Vyvanse has flexible administration options:
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Swallow whole — the standard method; the capsule dissolves in the stomach and lisdexamfetamine is absorbed intact
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Open and dissolve in water — empty the capsule completely into a glass of water and stir until fully dissolved; consume immediately; a translucent film may remain in the glass — this contains no active ingredient
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Mix into yoghurt or orange juice — an option for patients, particularly children, who resist swallowing capsules; the same “consume immediately” rule applies
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Do not crush, chew, or snort the powder — the prodrug conversion occurs in red blood cells, not in the nose or from rapid oral dissolution; manipulating the capsule does not accelerate onset and increases cardiovascular risk
Safety and Ingredient-Related Considerations for Australian Users
The ingredient profile of Vyvanse is relatively clean from an allergen and intolerance perspective — the excipient list is short and composed of widely used, well-tolerated pharmaceutical materials. However, a few specific considerations are worth noting:
Gelatin capsule shell: Patients observing halal, kosher, or vegan dietary requirements should consult with their prescriber or pharmacist about the gelatin source. The capsule contents can be dissolved and consumed without the shell if needed — this is a documented and acceptable administration method.
Magnesium stearate sensitivity: While extremely rare, some individuals report gastrointestinal sensitivity to magnesium stearate in supplement or pharmaceutical formulations. This is not a documented clinical contraindication for Vyvanse specifically, but it’s worth mentioning to your prescriber if you experience unexplained GI symptoms that don’t correlate with the stimulant effects.
Dextroamphetamine — what drug tests detect: It is the dextroamphetamine metabolite — not lisdexamfetamine itself — that triggers a positive result on standard amphetamine urine drug screens. If you are subject to workplace or legal drug testing in Australia, carry documentation of your Schedule 8 prescription, as the positive result will need to be reviewed in a medical context.
Common Misconceptions About What Is in Vyvanse
Myth 1: “Vyvanse contains methamphetamine.”
It does not. Vyvanse contains lisdexamfetamine dimesylate, which converts to dextroamphetamine — a distinct compound from methamphetamine. While all three share a phenethylamine chemical backbone, methamphetamine carries an additional methyl group that dramatically alters its pharmacological profile, lipophilicity, and neurotoxicity. Dextroamphetamine and methamphetamine are not the same drug.
Myth 2: “The extended release in Vyvanse comes from a special coating inside the capsule.”
There is no special coating, bead system, or polymer technology inside a Vyvanse capsule. The capsule contains plain powder — lisdexamfetamine dimesylate and three excipients. The extended action comes entirely from the biological rate at which red blood cell enzymes convert lisdexamfetamine to dextroamphetamine. This is what makes Vyvanse fundamentally different from Adderall XR’s dual-bead technology or Concerta’s osmotic pump.
Myth 3: “Opening the Vyvanse capsule makes it work faster or stronger.”
Opening the capsule and dissolving the powder in liquid is a TGA-accepted administration method — but it produces no pharmacokinetic advantage. Onset speed is determined by enzymatic conversion in red blood cells, not by how quickly lisdexamfetamine enters the stomach. The only effect of manipulating the capsule is changing the delivery vehicle — the biology of the drug’s activation is unchanged.
FAQ — People Also Ask
Does Vyvanse contain any natural ingredients?
Yes — L-lysine, one of the two structural components of lisdexamfetamine, is a naturally occurring essential amino acid found in foods including meat, eggs, dairy, and legumes. When the active ingredient is metabolised, the L-lysine released is biologically indistinguishable from dietary lysine. The dextroamphetamine component, however, is fully synthetic.
Are there any allergens in Vyvanse capsules?
The inactive excipients — microcrystalline cellulose, croscarmellose sodium, and magnesium stearate — are not common food allergens. The capsule shell is gelatin-based, which is relevant for dietary or religious reasons. Patients with known hypersensitivity to amphetamines should not use Vyvanse at all — this is a contraindication, not simply a side effect concern. Always review the current Consumer Medicine Information (CMI) with your pharmacist before starting.
Is lisdexamfetamine the same as dextroamphetamine?
No — they are related but chemically distinct. Lisdexamfetamine is an inactive prodrug; dextroamphetamine is its active metabolite. Taking lisdexamfetamine (Vyvanse) produces dextroamphetamine effects, but taking dextroamphetamine directly (e.g., dexamphetamine tablets) bypasses the prodrug conversion entirely and acts much faster and more abruptly.
Can you dissolve Vyvanse in water and drink it?
Yes — this is a fully accepted administration method. Empty the entire capsule contents into water, stir thoroughly until fully dissolved, and consume immediately. A translucent residue may remain in the glass after drinking — this is the capsule shell material and contains no active medication. Do not mix and store for later.
Why does Vyvanse come in different coloured capsules?
The colour-coding of Vyvanse capsules is a dose-identification system. Each strength (20 mg through 70 mg) has a distinct capsule colour combination to reduce dispensing errors and help patients quickly identify their correct dose. The dyes used are standard pharmaceutical-grade colorants — the colour itself has no therapeutic function.
What is the difference between the ingredients in Vyvanse 30 mg and 70 mg?
The inactive excipients are identical across all strengths. The only difference is the quantity of lisdexamfetamine dimesylate — a 30 mg capsule contains 30 mg of the active ingredient, a 70 mg capsule contains 70 mg. More active ingredient produces more active dextroamphetamine after conversion, which accounts for the increased duration and peak intensity at higher doses.
Does Vyvanse contain gluten or dairy?
The listed inactive ingredients — microcrystalline cellulose, croscarmellose sodium, and magnesium stearate — do not contain gluten or dairy. However, patients with coeliac disease or severe dairy allergies should confirm with their pharmacist using the current batch-specific product information, as manufacturing processes and suppliers can vary. The Australian CMI for Vyvanse should be the definitive reference for ingredient verification.
Every Vyvanse capsule contains one active ingredient — lisdexamfetamine dimesylate — and three pharmaceutical excipients. The active ingredient itself is inert until your body converts it, the excipients serve manufacturing purposes only, and the extended action that distinguishes Vyvanse from every other ADHD medication comes not from any ingredient in the capsule but from the biological process that happens in your blood after you swallow it.
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