What is better, Guanfacine or Clonidine for ADHD?

There is no one-size-fits-all ADHD medication. The choice between Guanfacine and Clonidine depends on treatment response, medical history, health conditions, and specific symptoms. Guanfacine generally causes less sedation and has a longer duration of action, making it preferable for daytime ADHD symptom control, especially in adults. Clonidine is often preferred for sleep issues, hyperarousal, and anxiety-related agitation, especially in children. Only a licensed healthcare provider can determine which is right for you.

What are the main downsides of Guanfacine?

Guanfacine should be used cautiously in people with heart disease, kidney problems, or diabetes. Rarely, hallucinations have been reported in some children using Guanfacine for ADHD. Guanfacine can interact with other medications, including benzodiazepines, sleep medications, alcohol, and Clonidine. Some people may experience depression-like symptoms such as apathy and emotional blunting. It can also cause dizziness, drowsiness, and reduced alertness, so caution is needed when driving or operating machinery. Guanfacine should not be stopped abruptly without consulting a healthcare provider.

Can I take Guanfacine and Clonidine together?

Guanfacine and Clonidine should generally not be taken together because both are alpha-2 adrenergic agonists that can slow heart rate and lower blood pressure. Combining them or taking them with other medications that depress the heart rate may significantly increase the risk of hypotension and cardiovascular side effects. Any decision to combine or transition between these medications must be made under close medical supervision.

Learn the differences between Guanfacine and Clonidine for ADHD. Compare the benefits and side effects to find which non-stimulant option is right for you

Guanfacine vs Clonidine: A Comprehensive Guide to Choosing the Right ADHD Medication

Guanfacine and Clonidine both work similarly to lower blood pressure and are approved for ADHD in their extended-release form for children and adolescents.

Guanfacine and Clonidine work by affecting receptors in the brain, improving focus and reducing impulsivity.

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Important

Tell your doctor if you are taking other medications with Guanfacine or Clonidine. Consult your doctor if you have:

Heart disease
Low blood pressure
History of heart attack
Allergic reaction
Kidney disease

Take Guanfacine and Clonidine as prescribed by your doctor

What is Guanfacine

Guanfacine is a medication used to help manage blood pressure, reduce impulsivity, and improve focus and attention. It is an alpha-2 agonist that is sometimes used with other blood pressure medications. FDA-approved uses of Guanfacine are:

Guanfacine ER (extended-release), under the brand name Intuniv, is used alone or with stimulants to help with ADHD symptoms. It is approved for children (6 years and older) and adolescents.
Guanfacine IR (immediate-release) under the brand name Tenex to help lower blood pressure in adults, and is sometimes used off-label for ADHD

9 Possible Side Effects of Guanfacine

Possible side effects of Guanfacine are:

Slow heartbeat
Drowsiness
Anxiety (rare)
Hallucinations (very rare)
Nervousness
Trouble sleeping
Dry mouth
Nausea
Constipation

This is not the complete list of side effects. If you experience unusual symptoms or other side effects that become severe, contact your health provider immediately, or you may report to the FDA at 1-800-FDA-1088

What is Clonidine

Clonidine is a non-stimulant medication that helps to control high blood pressure and ADHD symptoms. It belongs to a drug class, alpha-2 adrenergic agonists. FDA-approved uses of Clonidine are:

Clonidine ER (Extended-Release), under the brand name Kapvay, is used to help with ADHD in children and adolescents.
Clonidine IR (Immediate-release), under the brand name Catapres, is used to reduce blood pressure in adults.

7 Possible Side Effects of Clonidine

Possible side effects of Clonidine include:

Shortness of breath (serious)
Chest pain (serious)
Slow heartbeat
Nausea
Constipation
Insomnia (sleep problem)
Loss of appetite

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Ask an Expert

My son with ADHD experiences significant emotional outbursts, *ADHD related rage, and aggression, which affects his school and daily life. Are Guanfacine and Clonidine helpful?***

Stimulants are the first-line treatment to help manage ADHD symptoms. Non-stimulant alpha-2 agonists like Guanfacine (ER) and Clonidine can be considered when emotional dysregulation is a primary concern.

Guanfacine and Clonidine help to improve reactivity and emotional control.

Guanfacine is preferred for emotional dysregulation during daytime, while Clonidine helps with sleep issues (insomnia) and nighttime hyperarousal.

It requires close medical supervision.

How Do Guanfacine and Clonidine Work for ADHD?

Guanfacine and Clonidine act on alpha-2 receptors in the brain. Guanfacine is more selective for the alpha-2 adrenergic receptor subtype in the brain, particularly in the prefrontal cortex, and Clonidine acts on multiple alpha-2 receptor subtypes, leading to broader effects on the brain, causing more sedation and helping with hyperactivity and sleep problems.

Guanfacine and Clonidine help regulate norepinephrine activity in the brain by stimulating alpha-2 receptors, which strengthens prefrontal cortex functioning to improve focus, reduce impulsivity, and support emotional control.

Guanfacine is less sedating and helps with ADHD symptoms, while Clonidine is more sedating, which helps with sleep problems in children with ADHD. Both work by calming overactive nerve cells in the brain, improving attention, emotional regulation, and reducing impulsivity and anxiety.

Noradrenaline, also known as Norepinephrine, is an important neurotransmitter that, along with dopamine, regulates cognitive function in the prefrontal cortex, improving attention, behavior, and emotional regulation.

If you are struggling with ADHD, you might know the medication treatment for ADHD that may involve

Stimulants
Non-stimulants

Psychostimulants are first-line treatment for ADHD, such as Adderall, Ritalin, or Concerta, but some people may resist using stimulant medications for some reasons, such as:

Tolerance
Severe side effects
Ineffectiveness

A non-stimulant medication is an alternative option to help manage ADHD symptoms. Guanfacine and Clonidine are non-stimulants that work by calming overactive brain pathways.

Comparison of Guanfacine and Clonidine

Guanfacine vs. Clonidine
Features	Guanfacine (Intuniv)	Clonidine (Kapvay)
FDA-approved for ADHD	Guanfacine (Intuniv) ER form	Clonidine (Kapvay) ER form
Off-label uses	Anxiety Post-traumatic stress disorder Autism related hyperactivity Tic disorder	Anxiety Post-traumatic stress disorder Pain management Opioid withdrawal
Manages well	Impulsivity Daytime ADHD symptoms Emotional regulation	Hyperarousal Sleep problems aggression Anxiety Tics
Duration	Longer-acting	Short-acting
Onset	Slow	Fast
Dosing	1mg, 2mg, 3mg, 4mg tablets	0.1mg and 0.2mg tablets
Sedation profile	Mild sedation	Stronger sedation
Common side effects	Dry mouth Fatigue Drowsiness dizziness	Dry mouth Fatigue Significant drowsiness dizziness
Rebound risks	Lower risk if stopped suddenly	Higher risk if stopped abruptly
Blood pressure drop	Mild	Moderate to severe
Withdrawal effects	yes	yes

Overdose of Guanfacine and Clonidine

It might be possible that you or your child may take too much of Guanfacine or Clonidine. Both medications are alpha-2 adrenergic agonists that slow down the CNS and cardiovascular system. Taking too much Guanfacine or Clonidine can lead to low blood pressure, which may worsen after an overdose and cause serious harm to health. Overdose symptoms may include:

Drop in blood pressure
Severe sedation
Respiratory depression
Fainting
Coma (in severe cases)

Children are more sensitive and may be extremely sleepy with slow breathing. Close medical monitoring is required.

If you have taken too much of a stimulant such as Adderall, Vyvanse, or a non-stimulant (Guanfacine, Clonidine), contact your healthcare provider immediately or seek medical emergency help.

If you suspect an overdose, call 911 or poison control immediately

Can You Take Guanfacine and Clonidine Together?

You should not take Guanfacine and Clonidine together, or with other medications that depress your heart rate and increase the risk of hypotension, as it may slow your heart rate and cause serious consequences.

Guanafacine or Clonidine should not be taken with other medications to avoid drug interactions unless under medical supervision.

Important

If you are taking other medications or want to switch or change medication, discuss with your healthcare provider first.
Do not stop taking both medications abruptly, especially Clonidine, as it may spike in blood pressure. Always discuss with your healthcare provider first before stopping or switching medications.

Is Guanfacine or Clonidine Right for ADHD?

Guanfacine and Clonidine are effective non-stimulant options to help manage ADHD symptoms. The effectiveness of the treatment depends on the treatment response, symptoms, and medication side effects. Your healthcare provider will determine which medication is right for you based on your specific needs.

Therapy Fleet can help you to decide on ADHD treatment online with trained and licensed ADHD experts.

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Conclusion

Stimulant medications are the first-line treatment for ADHD. Still, if stimulants are poorly tolerated and ineffective, a non-stimulant option, such as Guanfacine and Clonidine, is useful to manage ADHD symptoms.

Guanfacine is more selective in its action and causes low sedation, making it a favorable option for daytime ADHD symptoms.

Clonidine helps with hyperactivity and sleep issues, and causes more sedation than Guanfacine.

Choosing the right medication may depend on factors such as tolerance, medical history, and side effect profile. Only a licensed healthcare provider can determine the most appropriate option based on your individual needs through telehealth services. Start today with Therapy Fleet and take the first step towards a more focused, balanced, and fulfilling life.

Finding the right ADHD medication isn’t about choosing the strongest option. It’s about choosing the one that fits your life.

FAQs

Here are answers to some common questions our therapists receive about Guanfacine and Clonidine.

1. What is better? Guanfacine or Clonidine?

There is no one-size-fits-all. It depends on factors such as treatment response, medical history, health conditions, and symptoms. Guanfacine causes less sedation and has a longer duration than Clonidine, making it preferable, especially for adults.

Clonidine is preferable for sleep issues and anxiety-related agitation, especially in children.

2. Can Guanfacine and Clonidine replace stimulants?

Stimulant medications are primarily used for the treatment of ADHD. If stimulant medication such as Adderall, Focalin, Vyvanse, or Concerta hasn’t worked for you or is contraindicated, your healthcare provider may recommend non-stimulant ADHD medication. Guanfacine or Clonidine could be a good option to manage ADHD symptoms.

3. Can I switch from Clonidine to Guanfacine?

Yes, but it requires careful monitoring and guidance by your healthcare provider. The most obvious way to switch from Clonidine to Guanfacine is to taper off Clonidine IR and then start Guanfacine XR gradually.

4. What are the 5 downsides of Guanfacine?

Use Guanfacine cautiously if you have heart disease, kidney problems, or diabetes. Consult your doctor before taking Guanfacine.
Hallucination has been reported in children while using Guanfacine for ADHD. Hallucinations were added as an adverse outcome, though it is rare, and minimal studies show hallucinations are reported using non-stimulant (Guanfacine)
It may interact with other medications, including Benzodiazepines, Sleep medications, alcohol, and Clonidine.
Some people may experience depression like symptoms (less common), such as apathy and emotional blunting.
Be cautious while driving or operating heavy machinery, as it can cause dizziness, drowsiness, and reduced alertness.

Guanfacine should not be stopped abruptly without consulting your doctor.

MEDICAL DISCLAIMER

At TherapyFleet, we strive to enhance the quality of life for those dealing with mental health issues. Our licensed medical professionals meticulously research, edit, and review all content before publication. Nonetheless, this information should not replace professional medical advice, diagnosis, or treatment. For medical guidance, please consult your physician or reach out to Therapy Fleet’s qualified staff.