Comprehensive medication guide to Intuniv including estimated pricing, availability information, side effects, and how to find it in stock at your local pharmacy.
Estimated Insurance Pricing
$60–$80 copay for brand Intuniv on commercial plans; generic guanfacine ER is often Tier 1–2 with copays of $0–$30; prior authorization may be required for brand by Medicare and some commercial plans.
Estimated Cash Pricing
$200–$360/month retail for brand Intuniv; generic guanfacine ER averages ~$208 retail but as low as $11–$15 with GoodRx or SingleCare coupons for a 30-day supply.
Medfinder Findability Score
78/100
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Intuniv is the brand name for guanfacine extended-release (ER), a once-daily non-stimulant prescription medication used to treat attention deficit hyperactivity disorder (ADHD) in children and adolescents ages 6 to 17. It was originally developed as an antihypertensive agent and belongs to the class of centrally acting alpha-2A adrenergic receptor agonists.
Intuniv is available as extended-release tablets in four strengths: 1 mg, 2 mg, 3 mg, and 4 mg. Generic guanfacine ER is available from multiple manufacturers and is bioequivalent to brand Intuniv. It is not a controlled substance and has no abuse potential, making it a valuable alternative for patients who cannot tolerate stimulant ADHD medications or when stimulant supply is constrained.
Off-label uses of guanfacine ER include adult ADHD, tic disorders, Tourette syndrome, PTSD-related hyperarousal, and behavioral dysregulation. The immediate-release form (Tenex) is approved for hypertension in adults but is not interchangeable with Intuniv on a milligram-for-milligram basis.
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Intuniv works as a selective alpha-2A adrenergic receptor agonist. It directly activates alpha-2A receptors concentrated in the prefrontal cortex — the brain region responsible for attention, executive function, and impulse control. By stimulating these receptors, guanfacine ER strengthens the neuronal connections within the prefrontal cortex, improving the brain's ability to sustain attention, filter distractions, and regulate behavior.
This mechanism is fundamentally different from stimulant ADHD medications (Adderall, Ritalin), which work by flooding the brain with more dopamine and norepinephrine. Intuniv does not increase dopamine at all and works through targeted norepinephrine receptor activation rather than neurotransmitter flooding — which explains why it doesn't cause the same appetite suppression, insomnia, or abuse potential as stimulants.
Alpha-2A receptors in the brainstem also regulate the sympathetic nervous system, which is why guanfacine lowers blood pressure and heart rate. The extended-release formulation releases guanfacine slowly over 24 hours, providing consistent receptor stimulation while minimizing the sedation spike that would occur with immediate-release guanfacine. The drug is metabolized primarily by CYP3A4/CYP3A5 enzymes, with a half-life of approximately 17 hours.
1 mg — Extended-release tablet
Starting dose; titrate up no faster than 1 mg/week
2 mg — Extended-release tablet
Common maintenance dose for younger/smaller children
3 mg — Extended-release tablet
Mid-range maintenance dose
4 mg — Extended-release tablet
Maximum labeled dose for children ages 6-12; weight-based dosing applies
Intuniv (guanfacine ER) is generally available in the U.S. and is not listed on the FDA's Drug Shortage database as of 2026. Because it is not a controlled substance, it is not subject to the DEA production quotas that have created formal national shortages of stimulant ADHD medications like Adderall. This gives Intuniv a structural supply advantage over Schedule II stimulants.
However, localized pharmacy stockouts do occur. The ongoing stimulant shortage has significantly increased demand for non-stimulant ADHD alternatives including Intuniv. Generic market fragmentation — multiple manufacturers, each pharmacy stocking only one — creates situations where some strengths (particularly 3 mg and 4 mg) may be harder to find at specific locations. Rural areas and small independent pharmacies may face more variability than urban pharmacy networks.
If your local pharmacy is out of stock, start your search early and expand to independent pharmacies, grocery store pharmacies, or mail-order options. medfinder contacts pharmacies near you to find which ones can fill your Intuniv prescription — saving you hours of calls and hold time.
Because Intuniv (guanfacine ER) is not a controlled substance, any licensed prescriber with authority to write prescriptions in your state can prescribe it. There are no DEA registration requirements or special authorizations needed — a major advantage over Schedule II stimulant ADHD medications.
Telehealth prescribing is fully available for Intuniv. Since it is not a controlled substance, there are no DEA restrictions on prescribing via video visit. ADHD-focused telehealth platforms and general telehealth services can prescribe Intuniv without requiring an in-person appointment — a significant advantage over stimulant ADHD medications.
No. Intuniv (guanfacine ER) is not a controlled substance. It has no DEA schedule and is not subject to the production quotas, prescribing restrictions, or dispensing limitations that apply to Schedule II medications like Adderall, Ritalin, or Vyvanse.
This non-controlled status has significant practical advantages: Intuniv can be prescribed via telehealth without in-person DEA registration requirements, refills can be called in by phone in most states, 90-day supply prescriptions can be written without restriction, and mail-order dispensing is fully available. There is no abuse potential or dependence risk associated with guanfacine ER.
Note: Although Intuniv is not a controlled substance and doesn't have abuse potential, it should never be stopped abruptly. Sudden discontinuation can cause rebound hypertension. Always taper under medical supervision.
The most commonly reported side effects include:
Serious side effects requiring immediate medical attention:
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Clonidine ER (Kapvay)
Same alpha-2 agonist class; FDA-approved for ADHD in children; twice-daily dosing; more sedating; dose equivalence to guanfacine is not 1:1
Atomoxetine (Strattera)
Non-stimulant norepinephrine reuptake inhibitor; FDA-approved for ADHD in children, adolescents, and adults; takes 4-8 weeks for full effect; not a controlled substance
Viloxazine (Qelbree)
Newer non-stimulant ADHD medication (FDA-approved 2021); serotonin-norepinephrine modulating agent; once daily; less sedating; still brand-only as of 2026
Methylphenidate (Ritalin, Concerta)
Stimulant ADHD medication; different mechanism (dopamine/norepinephrine reuptake inhibition); Schedule II controlled substance; subject to DEA quota restrictions
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Ketoconazole (Nizoral) / Fluconazole (Diflucan)
majorStrong CYP3A4 inhibitors — increase guanfacine blood levels up to 3-fold. Limit Intuniv dose to 2 mg/day when co-administered. Reduce dose gradually when inhibitor is stopped.
Carbamazepine (Tegretol) / Phenytoin (Dilantin) / Rifampin (Rifadin)
majorStrong CYP3A4 inducers — decrease guanfacine exposure by up to 70%. May need to increase Intuniv dose to 8 mg/day. Reduce by 50% when inducer is discontinued.
Valproic acid (Depakote/Depakene)
moderateGuanfacine ER increases valproic acid blood levels. Monitor for signs of valproate toxicity (nausea, vomiting, lethargy) when Intuniv is added to valproate regimen.
Alcohol
moderateAdditive CNS depression and sedation. Avoid alcohol while taking Intuniv.
Antihistamines (Benadryl, Zyrtec, Claritin)
moderateAdditive sedation. Especially concerning with sedating antihistamines like diphenhydramine (Benadryl). Use caution.
St. John's Wort
moderateCYP3A4 inducer; significantly reduces guanfacine levels. Avoid while taking Intuniv.
Other antihypertensives
moderateAdditive blood pressure lowering effect. Monitor BP carefully if taking other blood pressure medications.
Grapefruit juice
minorInhibits CYP3A4; increases guanfacine levels. Avoid grapefruit and grapefruit juice while taking Intuniv.
Intuniv (guanfacine ER) is one of the most supply-stable ADHD medications available in 2026. Its non-controlled status exempts it from DEA quota restrictions that have constrained stimulant supply for over three years, making it a valuable treatment option both as a standalone therapy and as an adjunct to stimulants. For families navigating the ongoing ADHD medication shortage, Intuniv represents a clinically effective alternative with a more predictable supply chain.
Generic guanfacine ER is widely available and dramatically less expensive than brand Intuniv — as low as $11-15 per month with discount coupons. Insurance coverage is broad, with generic guanfacine ER often placed on Tier 1 or Tier 2 formulary positions. Patients who encounter local pharmacy stockouts have multiple options: mail-order pharmacy, independent pharmacies, and pharmacy comparison tools.
If you're having trouble finding Intuniv at your pharmacy, medfinder calls pharmacies near you to identify which ones have your prescription in stock. Enter your medication, dosage, and location — results are texted directly to you so you can find your medication without the frustration of calling pharmacies one by one.
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