Is Vyvanse Stronger Than Adderall? Key Differences

When an ADHD medication does not last long enough or causes bothersome side effects, patients may wonder whether another stimulant would work better. One common question is: is Vyvanse stronger than Adderall?

The short answer is not necessarily. Vyvanse and Adderall are both amphetamine-based prescription stimulants used to treat attention-deficit/hyperactivity disorder (ADHD), but their ingredients and release characteristics differ. Their doses also cannot be compared milligram for milligram. Which medication works better depends on the prescribed dose, how long symptom control is needed, individual response, other health conditions, and side effects.

How Do Vyvanse and Adderall Work?

Vyvanse contains lisdexamfetamine, a prodrug. A prodrug is an inactive or less active form that the body converts into an active medication. After Vyvanse is taken, lisdexamfetamine is converted primarily in the blood into dextroamphetamine. Adderall contains a mixture of dextroamphetamine and levoamphetamine salts. Both medications affect brain chemicals involved in attention and impulse control, including dopamine and norepinephrine.

Patients who want detailed safety and prescribing information can review the FDA prescribing information for Vyvanse and the FDA prescribing information for Adderall XR.

Is Vyvanse Stronger Than Adderall, and Which Lasts Longer?

Calling one medication "stronger" can be misleading because their milligram strengths are not equivalent. A higher number of milligrams of Vyvanse does not automatically mean that it delivers a stronger stimulant effect than a lower number of milligrams of Adderall.

Duration is one practical difference. According to the American Academy of Child and Adolescent Psychiatry medication guide, Vyvanse may provide effects for about 12 to 14 hours, while immediate-release Adderall may last around 6 hours and Adderall XR about 12 hours. These are estimates, and the duration can vary considerably from person to person.

Vyvanse is generally taken once in the morning. Adderall XR is also taken once in the morning, while immediate-release Adderall may be prescribed on a different schedule. FDA labeling lists different starting doses and available strengths for each medication, which is another reason patients should not attempt to convert doses themselves.

For people whose healthcare provider recommends a nonstimulant ADHD medication, Canada Pharmacy also provides information about Intuniv (guanfacine extended-release).

Side Effects, Cautions, and Contraindications

Common side effects

Vyvanse and Adderall can cause similar side effects because both are stimulants. Common effects may include decreased appetite, trouble sleeping, dry mouth, nausea, anxiety, and weight loss. Individual reactions vary, and persistent or troublesome symptoms should be discussed with a healthcare provider.

Important cautions

Both medications can increase heart rate and blood pressure and require additional caution in people with certain cardiovascular or psychiatric conditions. They also carry boxed warnings about abuse, misuse, and addiction and are Schedule II controlled substances in the United States. Patients should tell their prescriber about all prescription drugs, over-the-counter medicines, and supplements they use because clinically significant interactions are possible.

Contraindications

Vyvanse and Adderall XR should not be used in people with a known hypersensitivity to amphetamine products. They are also contraindicated during treatment with monoamine oxidase inhibitors (MAOIs), or within 14 days after stopping an MAOI, because of the risk of a dangerous hypertensive reaction.

Neither Vyvanse nor Adderall is universally stronger or better. A healthcare provider can help determine which medication, formulation, and dose are appropriate based on ADHD symptoms, daily schedule, health history, other medications, and treatment response. Do not stop, switch, or change the dose of a prescribed stimulant without speaking with your healthcare provider.

Is Vyvanse more powerful than Adderall?

Not in a way that can be determined simply by comparing milligram amounts. The medications contain different forms of amphetamine and are processed differently by the body. Individual response and prescribed dose are more useful considerations than the number printed on the prescription.

Does Vyvanse last longer than Adderall?

Vyvanse may provide effects for approximately 12 to 14 hours. Immediate-release Adderall generally has a shorter duration, while Adderall XR may last about 12 hours. Actual duration varies between patients.

Can you compare Vyvanse and Adderall doses directly?

No. Vyvanse and Adderall doses should not be considered equivalent milligram for milligram. A prescriber should determine an appropriate dose when starting or changing ADHD medications.

Do Vyvanse and Adderall have the same side effects?

They share many potential side effects, including decreased appetite, insomnia, dry mouth, nausea, anxiety, and weight loss. Their FDA labeling also contains similar warnings about cardiovascular effects, psychiatric reactions, interactions, and misuse.