Alternatives to Guanfacine If You Can't Fill Your Prescription

Guanfacine (Intuniv) is a non-stimulant medication used primarily to treat ADHD and hypertension. If your pharmacy doesn't have it in stock, or if your insurance has stopped covering it, you don't necessarily have to go without treatment. Several alternatives may work well depending on the condition Guanfacine is treating for you.

Important: Never stop Guanfacine abruptly and never switch medications without talking to your prescriber first. Abrupt discontinuation can cause rebound hypertension. Any medication change requires a doctor's guidance.

Alternatives to Guanfacine for ADHD

If you're taking Guanfacine ER (Intuniv) for ADHD, these alternatives may be options your prescriber considers:

1. Clonidine ER (Kapvay)

Clonidine extended-release (brand: Kapvay) is the most similar alternative to Guanfacine. Both are alpha-2 adrenergic agonists FDA-approved for ADHD in children ages 6–17. Clonidine works on multiple alpha-2 receptor subtypes (2A, 2B, and 2C), while Guanfacine is more selective for 2A. This makes Clonidine slightly more sedating — which can be a benefit for patients with sleep difficulties, but a drawback for those who need to stay alert.

Best for: Patients who also struggle with sleep or have comorbid tic disorders

Availability: Generic is widely available; Kapvay brand may be harder to find

Cost: Generic Clonidine is inexpensive — often under $20 for a 30-day supply

2. Atomoxetine (Strattera)

Atomoxetine (brand: Strattera) is a selective norepinephrine reuptake inhibitor (SNRI) approved for ADHD in both children and adults — making it a useful option for adult ADHD where Guanfacine ER is not formally approved. It takes 2–6 weeks to reach full effect. Unlike Guanfacine, it carries an FDA black box warning about increased suicidal thoughts in children and adolescents, so close monitoring is required.

Best for: Adults with ADHD; patients who cannot tolerate the sedation from alpha-2 agonists

Availability: Generic available since 2017; generally well-stocked

Cost: Generic significantly cheaper than brand Strattera; GoodRx prices start around $30–$80

3. Viloxazine ER (Qelbree)

Viloxazine extended-release (brand: Qelbree) is a newer FDA-approved non-stimulant for ADHD, approved for children and adolescents aged 6–17. It's a serotonin norepinephrine modulating agent (SNMA) — a different mechanism from both Guanfacine and Atomoxetine. It's less sedating than Guanfacine and does not carry Atomoxetine's black box warning.

Best for: Children for whom sedation from alpha-2 agonists is a problem

Availability: Brand only (no generic yet as of 2026); may be harder to find and more expensive

Cost: Brand price approximately $300–$400/month; manufacturer savings programs available

4. Stimulant Medications (Methylphenidate, Amphetamines)

If Guanfacine was being used as a non-stimulant alternative because stimulants weren't an option, this may not apply. However, if stimulants were never tried or were previously well-tolerated, your prescriber may consider revisiting them. Generic methylphenidate (Ritalin, Concerta) and generic amphetamine salts (Adderall) remain first-line treatments for ADHD when tolerated, although supply of stimulants has been inconsistent since 2022.

Alternatives for Hypertension (If Using Guanfacine IR/Tenex)

If you're taking Guanfacine immediate-release for hypertension, there are many well-established alternatives your doctor may consider, including:

ACE inhibitors (e.g., lisinopril, enalapril)

ARBs (e.g., losartan, valsartan)

Calcium channel blockers (e.g., amlodipine)

Thiazide diuretics (e.g., hydrochlorothiazide)

Clonidine IR (also a centrally-acting alpha agonist, widely available as generic)

Comparing Guanfacine Alternatives Side by Side

Here's a quick summary for ADHD alternatives:

Clonidine ER (Kapvay): Most similar; more sedating; good for sleep/tics; inexpensive generic

Atomoxetine (Strattera): FDA-approved for adults; less sedating; slower onset; black box warning

Viloxazine ER (Qelbree): Newest option; brand only; less sedating; no generic yet

Next Steps

Before switching medications, it's always worth trying harder to find Guanfacine. See our guide: How to find Guanfacine in stock near you. If you've exhausted those options, talk to your prescriber about which alternative best fits your specific situation, health history, and insurance coverage.