Dexedrine Spansule: Uses, Dosage, Side Effects, and Safety Guide

Dexedrine Spansule is a sustained-release stimulant capsule containing dextroamphetamine sulfate, used for narcolepsy and, in pediatric patients, attention deficit hyperactivity disorder (ADHD). Its bead-based design releases an initial dose promptly and the remainder gradually over the day, often allowing once-daily dosing. Because it falls under Schedule II as a controlled substance, it requires careful prescribing, monitoring, and safe storage.

The information below reflects the current FDA prescribing information for Dexedrine Spansule (revised September 2025). However, this guide serves general education purposes only and does not replace advice from a licensed prescriber or pharmacist.

Product Overview

What Is Dexedrine Spansule?

Dexedrine Spansule is a central nervous system (CNS) stimulant. Specifically, it contains dextroamphetamine sulfate inside a sustained-release capsule, where an initial portion of the dose releases promptly and the rest releases gradually over a prolonged period. Manufacturers have marketed it since 1976 under its current NDA, and it remains an actively distributed brand today.

Active Ingredient

The active ingredient is dextroamphetamine sulfate, the dextro isomer of d,l-amphetamine sulfate.

Brand Name and Generic Name

The brand name is Dexedrine Spansule; Catalent Pharma Solutions currently manufactures it, and Amneal Specialty, a division of Amneal Pharmaceuticals, distributes it. The generic name is dextroamphetamine sulfate extended-release capsules, and other manufacturers also offer generic versions.

Drug Classification

Dexedrine Spansule belongs to the amphetamine class of CNS stimulants. Consequently, the DEA classifies it as a Schedule II controlled substance.

FDA-Approved Uses

The FDA approves Dexedrine Spansule for two conditions:

• Narcolepsy, in patients of essentially any age where the condition occurs (narcolepsy is uncommon, though not unheard of, in children under 12).
• Attention deficit hyperactivity disorder (ADHD), as part of a total treatment program, specifically in pediatric patients.

That said, the label does not recommend the Spansule capsule formulation for children younger than 6, and unlike some other amphetamine-based products, the current Dexedrine Spansule label does not carry a distinct adult ADHD indication — its ADHD use is specific to pediatric patients.

Evidence-Supported Off-Label Uses

Some clinicians use extended-release dextroamphetamine off-label for adult ADHD, drawing on the broader adult amphetamine evidence base, even though the current Dexedrine Spansule label’s formal ADHD indication is pediatric-specific. Because of this gap, this kind of use should only happen under a prescriber’s individualized judgment.

How It Works

Amphetamines increase the release of norepinephrine and dopamine and block their reuptake into the presynaptic neuron. Even so, researchers have not fully established the exact mechanism behind the clinical benefit in ADHD and narcolepsy.

Product Information Table

Attribute	Detail
Brand	Dexedrine Spansule
Generic	Dextroamphetamine sulfate extended-release
Active Ingredient	Dextroamphetamine sulfate
Drug Class	CNS stimulant (amphetamine)
Manufacturer	Manufactured by Catalent Pharma Solutions; distributed by Amneal Pharmaceuticals
Prescription Status	Prescription only
Controlled Drug Schedule	Schedule II (CII)
Dosage Forms	Sustained-release capsule
Strengths	5 mg, 10 mg, 15 mg
Administration Route	Oral
Onset (initial release)	Promptly, with peak plasma levels around 8 hours after dosing
Duration of Effect	Clinically reported as roughly 6–10 hours per dose
Half-Life	Approximately 12 hours
Storage	Room temperature, 68–77°F (20–25°C); protect from light

Available Strengths

Each capsule has a brown cap and natural (translucent) body, with imprints distinguishing the strengths.

Strength	Dosage Form	Color	Imprint (Cap / Body)
5 mg	Sustained-release capsule	Brown cap, natural body	“IX 5 mg” / “673 5 mg”
10 mg	Sustained-release capsule	Brown cap, natural body	“IX 10 mg” / “674 10 mg”
15 mg	Sustained-release capsule	Brown cap, natural body	“IX 15 mg” / “675 15 mg”

If a capsule looks different from what a patient normally receives, they should confirm with their pharmacist before taking it.

Dosage Guide

Dosing always depends on age, the condition under treatment, and individual response, so a prescriber determines the exact starting dose and any adjustments.

Children (ADHD, Ages 6 and Older)

Treatment typically starts at 5 mg once or twice daily, and the prescriber may increase the dose in 5 mg increments at weekly intervals until reaching an optimal response. Patients rarely need to exceed a total of 40 mg per day. Where appropriate, the prescriber may use the Spansule capsule for once-daily dosing.

Narcolepsy (Adults and Children)

For narcolepsy, meanwhile, the usual dose is 5 mg to 60 mg per day, depending on individual response. In children ages 6 to 12, the suggested initial dose is 5 mg daily; in patients 12 and older, dosing typically starts at 10 mg daily. From there, the prescriber may raise the dose in 5 mg (children) or 10 mg (12 and older) increments at weekly intervals until reaching an optimal response.

Adults (ADHD)

The current Dexedrine Spansule label does not include a formal, FDA-established adult ADHD dosing regimen — its ADHD indication and dosing table are specific to pediatric patients. As a result, prescribers base adult ADHD use on individualized clinical judgment, often informed by evidence from related amphetamine products with adult indications.

Older Adults

The current label does not include a dedicated geriatric dosing section. As with all stimulants, though, prescribers typically use added caution and start with the lowest effective dose in older adults.

Kidney Disease

The current label does not include specific dosing guidance for kidney impairment. Still, a prescriber may consider closer monitoring in patients with significant kidney disease.

Liver Disease

Likewise, the current label does not include specific dosing guidance for liver impairment. Because of this, patients should inform their prescriber of any significant liver condition before starting treatment.

How to Take It

Before Meals

Patients can generally take Dexedrine Spansule with or without food, since studies found similar absorption in fed and fasted states.

After Meals

As above, food timing stays flexible for Dexedrine Spansule. Consistency in daily timing may help maintain predictable symptom coverage.

Missed Dose

If patients miss a dose, they should generally take it as soon as they remember, unless it’s close to the next scheduled dose or would fall too late in the day, which could disrupt sleep. Patients should never double up doses, and they should avoid late evening doses due to the risk of insomnia.

Overdose

Amphetamine overdose can cause dangerously high blood pressure, rapid heartbeat, high body temperature, agitation, hallucinations, or seizures. Because of this risk, anyone who suspects an overdose should call Poison Control at 1-800-222-1222 or go to the nearest emergency room immediately.

Storage and Disposal

Patients should store Dexedrine Spansule in a secure, ideally locked, tightly closed, light-resistant container at room temperature. For disposal, a DEA-authorized take-back program works best; alternatively, patients can mix unused capsules with an undesirable substance such as coffee grounds, seal them, and discard them in household trash.

Benefits

For patients with narcolepsy or pediatric ADHD, Dexedrine Spansule offers the option of once-daily dosing in many cases, thanks to its sustained-release bead design, which can reduce the need for a midday dose at school. In addition, it has one of the longest track records of any stimulant formulation, since manufacturers have marketed it continuously since the 1970s.

Side Effects

Because stimulant medications affect multiple body systems, side effects range from mild to serious.

Common Side Effects

• Fast heartbeat
• Decreased appetite
• Tremors
• Headache
• Trouble sleeping
• Dizziness
• Stomach upset
• Weight loss
• Dry mouth

Less Common Side Effects

• Unpleasant taste
• Diarrhea or constipation
• Changes in libido, or frequent/prolonged erections
• Restlessness or overstimulation
• Alopecia (hair thinning)

Serious Side Effects

• New or worsening mental health symptoms, including mania or psychosis
• Slowed growth in children
• Circulation problems in fingers or toes (Raynaud’s phenomenon)
• Seizures
• New or worsening tics
• Serotonin syndrome (when combined with certain other medications)
• Rare reports of cardiomyopathy with chronic use

Emergency Symptoms

Patients should seek emergency care immediately for:

• Chest pain, shortness of breath, or fainting
• Signs of serotonin syndrome, such as agitation, high fever, tremor, or confusion
• A seizure
• Signs of a severe allergic reaction, such as facial or throat swelling

Drug Interactions

Dexedrine Spansule has one of the more extensive documented interaction profiles among stimulants.

Prescription Drugs

Doctors contraindicate combining Dexedrine Spansule with monoamine oxidase inhibitors (MAOIs) due to the risk of hypertensive crisis. In addition, serotonergic medications (SSRIs, SNRIs, triptans, tricyclic antidepressants, fentanyl, lithium, tramadol, buspirone) raise the risk of serotonin syndrome. Tricyclic antidepressants can also cause a striking, sustained increase in brain amphetamine concentrations, while CYP2D6 inhibitors like paroxetine and fluoxetine can increase dextroamphetamine exposure.

OTC Medicines

Alkalinizing agents like sodium bicarbonate increase amphetamine blood levels, so patients should generally avoid combining them. Acidifying agents, including some vitamin C preparations, can lower amphetamine blood levels, while proton pump inhibitors like omeprazole can decrease the time to peak amphetamine concentration.

Alcohol

The current label does not detail a specific dose-release interaction between alcohol and this formulation, but alcohol can add cardiovascular strain when combined with any stimulant. Because of this, patients should disclose alcohol use to their prescriber.

Supplements

St. John’s Wort raises the risk of serotonin syndrome when combined with Dexedrine Spansule. For this reason, patients should disclose all supplement use to their prescriber.

Herbal Products

As with St. John’s Wort above, patients should discuss herbal products with serotonergic or stimulant-like activity with a prescriber before combining them with Dexedrine Spansule.

Foods

Studies found the rate and extent of dextroamphetamine absorption from Dexedrine Spansule to be similar in fed and fasted states, so no major food restriction applies.

Warnings

Dexedrine Spansule carries an FDA boxed warning, the agency’s strongest safety warning, for abuse, misuse, and addiction. Specifically, misuse — including taking higher doses, using it without a prescription, or altering the route of administration — increases the risk of overdose and death.

In addition, the medication carries warnings for sudden death in patients with underlying heart conditions, increased blood pressure and heart rate, new psychiatric symptoms, seizures, serotonin syndrome, peripheral vasculopathy (including Raynaud’s phenomenon), long-term growth suppression in children, and new or worsening tics.

Contraindications

Patients should not use Dexedrine Spansule if they:

• Have a known hypersensitivity to amphetamine or other components of Dexedrine Spansule
• Are taking, or have taken within the past 14 days, a monoamine oxidase inhibitor (MAOI), including linezolid or intravenous methylene blue

Pregnancy

This medication’s labeling reflects an older format and uses the Pregnancy Category C system rather than the newer narrative pregnancy-labeling structure used on some other stimulant labels. Animal studies showed embryotoxic and teratogenic effects at high doses in mice, though not in rabbits or rats at lower dose multiples. There is also a single published case report of severe congenital abnormalities in an infant born to a mother who took dextroamphetamine together with lovastatin during the first trimester; researchers did not establish a causal link. Given this uncertainty, pregnant patients should use Dexedrine Spansule only if the potential benefit justifies the potential risk to the fetus, and infants born to mothers dependent on amphetamines face an increased risk of premature delivery and low birth weight.

Breastfeeding

Amphetamines pass into human milk. Because of this, the current Dexedrine Spansule labeling advises against breastfeeding during treatment.

Monitoring Requirements

Prescribers typically monitor the following throughout treatment:

• Blood pressure and heart rate at each visit
• Height and weight, checked often in pediatric patients
• Signs of new or worsening psychiatric symptoms
• Signs of misuse, dependence, or diversion
• Family and personal history of tics or Tourette’s syndrome before starting

Storage Instructions

Patients should keep Dexedrine Spansule at room temperature, between 68°F and 77°F (20°C to 25°C), in a tightly closed, light-resistant container. Beyond that, they should store it in a secure, ideally locked, location and never share it with anyone else, since doing so is both dangerous and illegal.

Frequently Asked Questions

What is Dexedrine Spansule used for?

The FDA approves Dexedrine Spansule to treat narcolepsy in patients of essentially any age, and attention deficit hyperactivity disorder (ADHD) as part of a total treatment program in pediatric patients ages 6 and older. Ultimately, a healthcare provider determines whether it’s an appropriate treatment based on a full diagnostic evaluation and cardiac screening before prescribing.

How is Dexedrine Spansule different from regular Dexedrine tablets?

Dexedrine Spansule is a sustained-release capsule, often usable once daily, that releases part of its dose promptly and the rest gradually over time. The original immediate-release Dexedrine tablet brand, by contrast, is discontinued, and patients typically took it multiple times a day, 4 to 6 hours apart. Even so, both contained the same active ingredient, dextroamphetamine sulfate.

What is the typical starting dose of Dexedrine Spansule?

For pediatric ADHD, the typical starting dose is 5 mg once or twice daily, and the prescriber increases it in 5 mg increments at weekly intervals, rarely exceeding 40 mg per day. For narcolepsy, meanwhile, dosing ranges more broadly, from 5 mg to 60 mg per day depending on age and response. A prescriber determines the right starting point.

Is Dexedrine Spansule approved for adults with ADHD?

Not under a distinct, formally established adult dosing regimen — the current label’s ADHD indication and dosing guidance are specific to pediatric patients. The FDA does approve Dexedrine Spansule for narcolepsy in adults, however. Beyond that, any adult ADHD use would involve individualized clinical judgment based on the broader amphetamine evidence base.

How long does Dexedrine Spansule last?

Clinical experience generally puts symptom coverage from a single dose at roughly 6 to 10 hours, with peak blood levels typically arriving around 8 hours after dosing, later than with an immediate-release tablet. Where that timing fits a patient’s needs, the prescriber may use the capsule once daily.

Can Dexedrine Spansule be taken with food?

Yes. Studies found the rate and extent of dextroamphetamine absorption from Dexedrine Spansule to be similar whether taken with a high-fat meal or on an empty stomach, so patients can generally take it with or without food.

What happens if a dose is missed?

If patients miss a dose, they should generally take it as soon as they remember, unless doing so would push it too late in the day or too close to the next scheduled dose. Patients should never double up doses, and they should avoid late doses to prevent sleep disruption.

Can Dexedrine Spansule capsules be opened?

If swallowing the capsule whole proves difficult, patients can typically open it and sprinkle the beads on a spoonful of cool soft food, such as applesauce, then swallow it right away without chewing. Patients should not crush or chew the beads themselves, and they should not store the mixture for later use. Either way, patients should confirm this approach with their pharmacist for their specific product.

What are the most common side effects of Dexedrine Spansule?

Patients most frequently report fast heartbeat, decreased appetite, tremors, headache, trouble sleeping, dizziness, stomach upset, weight loss, and dry mouth. Overall, most side effects stay mild, but patients should report anything severe or persistent to a prescriber.

Is Dexedrine Spansule addictive?

Yes. Dexedrine Spansule carries an FDA boxed warning for abuse, misuse, and addiction because it is a Schedule II controlled substance. Even when taken exactly as prescribed, long-term use can lead to physical dependence. For this reason, patients should never share their medication, and prescribers routinely reassess abuse risk throughout treatment.

Can Dexedrine Spansule cause serotonin syndrome?

Yes. Combining Dexedrine Spansule with serotonergic medications, such as SSRIs, SNRIs, triptans, tricyclic antidepressants, or St. John’s Wort, raises the risk of serotonin syndrome, a potentially life-threatening reaction. Because of this, patients should tell their prescriber about every medication and supplement they take before starting treatment.

Is Dexedrine Spansule the same as Adderall XR?

Not exactly. Dexedrine Spansule contains only dextroamphetamine, while Adderall XR contains a mixture of amphetamine salts, including both dextroamphetamine and levoamphetamine. Both are extended-release amphetamine-class stimulants, but their exact composition, approved age ranges, and side-effect profiles differ.

Is Dexedrine Spansule safe during pregnancy?

This medication’s labeling advises using it during pregnancy only if the potential benefit justifies the potential risk to the fetus, based on older animal studies and a single case report involving combined use with another medication. Given this, anyone who is pregnant or planning pregnancy should talk with their prescriber before continuing or starting treatment.

What should I do if I think I took too much Dexedrine Spansule?

Suspected overdose is a medical emergency. Symptoms can include a rapid heartbeat, dangerously high body temperature, severe agitation, hallucinations, or seizures. Given the risks, patients should call Poison Control at 1-800-222-1222 or go to the nearest emergency room immediately rather than waiting to see if symptoms improve.

Conclusion

Dexedrine Spansule has remained on the market continuously since the 1970s, offering a sustained-release option for narcolepsy at any age and for pediatric ADHD, often with the convenience of once-daily dosing. Its pediatric-specific ADHD indication, extensive drug interaction profile, and older-style pregnancy labeling are worth noting alongside the class-wide warnings around cardiovascular risk, psychiatric symptoms, serotonin syndrome, and abuse potential that other amphetamine products share. Ultimately, patients and caregivers who understand the dosing guidelines, potential side effects, and safety warnings covered in this guide will be better equipped to use Dexedrine Spansule safely and to recognize when to seek medical help.