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This is not a list of all drugs or health problems that interact with this medicine (guanfacine tablets).
Tell your doctor and pharmacist about all of your drugs (prescription or OTC, natural products, vitamins) and health problems. You must check to make sure that it is safe for you to take this medicine (guanfacine tablets) with all of your drugs and health problems. Do not start, stop, or change the dose of any drug without checking with your doctor.
Use this medicine (guanfacine tablets) as ordered by your doctor. Read all information given to you. Follow all instructions closely.
What do I do if I miss a dose?
WARNING/CAUTION: Even though it may be rare, some people may have very bad and sometimes deadly side effects when taking a drug. Tell your doctor or get medical help right away if you have any of the following signs or symptoms that may be related to a very bad side effect:
All drugs may cause side effects. However, many people have no side effects or only have minor side effects. Call your doctor or get medical help if any of these side effects or any other side effects bother you or do not go away:
These are not all of the side effects that may occur. If you have questions about side effects, call your doctor. Call your doctor for medical advice about side effects.
You may report side effects to the FDA at 1-800-FDA-1088. You may also report side effects at http://www.fda.gov/medwatch.
If you think there has been an overdose, call your poison control center or get medical care right away. Be ready to tell or show what was taken, how much, and when it happened.
Always consult your healthcare provider to ensure the information displayed on this page applies to your personal circumstances.
Medical Disclaimer
Other brands: Intuniv, Tenex
Medically reviewed by USARx EDITORIAL TEAM Last updated on 1/1/2020.
Source: Drugs.com Guanfacine Hcl (www.drugs.com/guanfacine.html).
Commonly reported side effects of guanfacine include: asthenia, constipation, drowsiness, decreased blood pressure, dizziness, fatigue, hypotension, sedated state, and xerostomia. Other side effects include: impotence, and nausea. See below for a comprehensive list of adverse effects.
Applies to guanfacine: oral tablet, oral tablet extended release
Along with its needed effects, guanfacine may cause some unwanted effects. Although not all of these side effects may occur, if they do occur they may need medical attention.
Check with your doctor immediately if any of the following side effects occur while taking guanfacine:
More common
Less common
Incidence not known
Get emergency help immediately if any of the following symptoms of overdose occur while taking guanfacine:
Symptoms of overdose
Some side effects of guanfacine may occur that usually do not need medical attention. These side effects may go away during treatment as your body adjusts to the medicine. Also, your health care professional may be able to tell you about ways to prevent or reduce some of these side effects. Check with your health care professional if any of the following side effects continue or are bothersome or if you have any questions about them:
More common
Less common
Incidence not known
After you stop using this medicine, it may still produce some side effects that need attention. During this period of time, check with your doctor immediately if you notice the following side effects:
Applies to guanfacine: oral tablet, oral tablet extended release
The most common adverse reactions were dry mouth, somnolence, headache, fatigue, dizziness, abdominal pain, constipation, appetite decreased, and sedation.
Very common (10% or more): Dry mouth (up to 54%), abdominal pain (up to 15%), constipation (up to 15%)
Common (1% to 10%): Vomiting, diarrhea, nausea, abdominal/stomach discomfort
Uncommon (0.1% to 1%): Dyspepsia
Very common (10% or more): Somnolence (up to 40.6%), headache (up to 28%), dizziness (up to 16%), sedation (10.2%)
Common (1% to 10%): Lethargy, convulsion, dizziness postural, syncope
Rare (less than 0.1%): Hypersomnia
Postmarketing reports: Tremor, paresthesias, vertigo, taste alteration, hypertensive encephalopathy
Very common (10% or more): Fatigue (up to 22%)
Common (1% to 10%): Asthenia
Uncommon (0.1% to 1%): Chest pain
Rare (less than 0.1%): Malaise
Very common (10% or more): Appetite decreased (up to 15%)
Common (1% to 10%): Weight increased
Frequency not reported: Body mass index increased
Postmarketing reports: Edema
Common (1% to 10%): Insomnia, depression, anxiety, affect lability, middle insomnia, nightmare, irritability
Uncommon (0.1% to 1%): Agitation, hallucination
Postmarketing reports: Confusion
Common (1% to 10%): Hypotension, bradycardia, orthostatic hypotension, tachycardia
Uncommon (0.1% to 1%): Pallor, atrioventricular block first degree, sinus arrhythmia, blood pressure increased, heart rate decreased
Rare (less than 0.1%): Hypertension
Frequency not reported: QTc prolongation
Postmarketing reports: Palpitations, rebound hypertension
Common (1% to 10%): Impotence, enuresis
Uncommon (0.1% to 1%): Pollakiuria
Frequency not reported: Urinary frequency increased
Postmarketing reports: Erectile dysfunction
Common (1% to 10%): Rash, pruritus
Postmarketing reports: Alopecia, dermatitis, exfoliative dermatitis
Uncommon (0.1% to 1%): Asthma
Postmarketing reports: Dyspnea
Uncommon (0.1% to 1%): ALT increased
Uncommon (0.1% to 1%): Hypersensitivity
Postmarketing reports: Arthralgia, leg cramps, leg pain, myalgia
Postmarketing reports: Blurred vision
Medically reviewed by USARx EDITORIAL TEAM Last updated on 1/1/2020.
Source: Drugs.com Guanfacine Hcl (www.drugs.com/guanfacine.html).
July 7, 2020
July 7, 2020
July 7, 2020
July 7, 2020
July 7, 2020
July 7, 2020
