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Get a Guanfacine Prescription Online

writtenByWritten by: Jennifer Nelson
Jennifer Nelson

Jennifer Nelson

Jennifer is a contributing health writer who has been researching and writing health content with PlushCare for 3 years. She is passionate about bringing accessible healthcare and mental health services to people everywhere.

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December 10, 2020 Read Time - 4 minutes

Get a Guanfacine Prescription Online

Are you looking for a non-stimulant ADHD treatment? Maybe you’re looking to treat high blood pressure. Either way, guanfacine might help. Let’s learn more about this medication and how you can get a guanfacine prescription online. 

Can You Buy a Guanfacine Prescription Online?

Legally, you must speak to a doctor before getting any prescription medication. So you can’t just buy guanfacine from a website and have it shipped to your door. However, you can have a video or phone appointment with a doctor who can electronically send a prescription for guanfacine to your local pharmacy. 

Appointments as low as $20.

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What Is Guanfacine?

Guanfacine is a medication that is available in two forms that treat two very different conditions:

  • Hypertention (high blood pressure)
  • Attention Deficit Hyperactivity Disorder (ADHD)

Under brand name Tenex, guanfacine treats high blood pressure.

On the other hand, Intuniv is a long-acting version of guanfacine that is used for ADHD treatment

Either way, guanfacine is in a class of medications called centrally acting alpha2A-adrenergic receptor agonists.

How Does Guanfacine Work?

Guanfacine lowers blood pressure by decreasing heart rate and relaxing the blood vessels to allow blood to flow more easily through the body.

Guanfacine extended-release tablets may treat ADHD by affecting the part of the brain that controls impulsivity and attention. 

Read: Get Strattera Online

Guanfacine Dosage and Treatment

Always follow your doctor’s dosage instructions.

Generally, the adult dose of guanfacine for treating high blood pressure is 1 mg orally once a day at bedtime. After three to four weeks, the dose can be increased to 2 mg. Adverse reactions increase significantly with doses above 3 mg per day.

The usual pediatric dose of extended-release guanfacine to treat ADHD is 1 mg, once per day, taken at the same time every day. The dosage may increase by up to 1 mg per week.

The maximum dosage will vary depending on the child’s size but shouldn’t exceed 7 mg per day. 

Benefits of Guanfacine

The regular version of guanfacine slows your heart rate and lowers blood pressure.

The extended-release version of guanfacine can treat symptoms of ADHD by:

  • Reducing distractibility
  • Improving working memory
  • Improving attention
  • Improving impulse control

Side Effects of Guanfacine

What are the side effects of guanfacine? Potential side effects of guanfacine include:

  • Weakness
  • Tiredness
  • Dry mouth
  • Irritability
  • Headache
  • Nausea
  • Vomiting
  • Constipation
  • Stomach pain
  • Decreased appetite
  • Decreased sexual ability
  • Rash
  • Blurred vision
  • Fainting
  • Slow heart rate

Considerations and Precautions of Guanfacine

While guanfacine is generally considered safe, it isn’t right for everybody. Make sure to tell your doctor about all the medications you take, including over-the-counter medications, vitamins, and supplements. Especially be sure to mention if you take any of the following:

  • Antihistamines
  • Antidepressants
  • Barbiturates like phenobarbital (Luminal)
  • Sedatives
  • Sleeping pills
  • Tranquilizers
  • Medications for anxiety, mental illness, nausea, high blood pressure, or seizures
  • Carbamazepine (Epitol, Carbatrol, Equetro, Tegretol) 
  • Clarithromycin (Biaxin, in PrevPac) 
  • Rifabutin (Mycobutin)
  • Itraconazole (Sporanox, Onmel)
  • Ketoconazole (Nizoral)
  • Nefazodone
  • Indinavir (Crixivan)
  • Nelfinavir (Viracept)
  • Phenytoin (Phenytek, Dilantin)
  • Pioglitazone (Actos, in Actoplus Met, in Oseni, in Duetact)
  • Rifampin (Rifadin, in Rifater, in Rifamate, Rimactane)
  • Ritonavir (Norvir, in Kaletra)
  • Valproic acid (Depakene)
  • St. John’s Wort

Always discuss your medical history with your doctor before starting any medication. Before starting guanfacine, tell your doctor if you have:

  • Ever fainted
  • Recently had a heart attack
  • Bipolar disorder
  • Ever had a stroke
  • Had liver, kidney, or heart disease
  • A slow heart rate
  • Low blood pressure

Also make sure to let your doctor know if you are pregnant, nursing, or planning on becoming pregnant. 

Frequently Asked Questions

What Does Guanfacine Do for ADHD?

Guanfacine can help people with ADHD have improved impulse control, attention, and working memory. It may help reduce ADHD symptoms like being inattentive, impulsive, hyperactive, or disruptive. 

What Kind of Drug is Guanfacine?

Guanfacine is a centrally acting alpha2A-adrenergic receptor agonist.

Does Guanfacine Help Anxiety?

There is some evidence that extended-release guanfacine may help reduce symptoms of anxiety. However, guanfacine isn’t commonly used to treat anxiety. Take our anxiety quiz here.

Does Guanfacine Cause Anger?

Everybody reacts to medications differently. However, anger and irritability are not common side effects of guanfacine. 

Can Guanfacine Help You Focus?

When used as directed, extended-release guanfacine can help people with ADHD to improve their focus. 

What Does Guanfacine Do to the Brain?

Guanfacine stimulates alpha2 adrenergic receptors in the brain, which causes the blood vessels to widen and the heart rate to slow down. 

  • Book on our free mobile app or website.

    Our doctors operate in all 50 states and same day appointments are available every 15 minutes.

  • See a doctor, get treatment and a prescription at your local pharmacy.

  • Use your health insurance just like you normally would to see your doctor.


Buy Guanfacine Online

Are you ready to order guanfacine online? You’ll need to speak to a doctor first. Luckily, PlushCare can help. You can have a phone or video appointment with a licensed doctor as soon as today to talk about whether guanfacine is right for you or your child. 

To make an appointment, simply click here or call (888)798-0620. If the doctor thinks that guanfacine would be an appropriate treatment, they will electronically send a prescription to your local pharmacy. You just pick it up when it’s ready. 

Read More About Getting Guanfacine Online


Medline Plus. Guanfacine. Accessed on August 21, 2020 at

WebMD. Guanfacine HCL ER. Accessed on August 21, 2020 at Guanfacine. Accessed on August 21, 2020 at

Journal of Child and Adolescent Psychopharmacology. Extended Release Guanfacine in Pediatric Anxiety Disorders: A Pilot, Randomized, Placebo-Controlled Trial. Accessed on August 22, 2020 at Guanfacine: 7 things you should know. Accessed on August 22, 2020 at

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