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Guanfacine: Oral tablet, extended release (1mg)

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Drug Image file DrugItem_13837.JPG
Intuniv 1mg ER Tab
Shire US Inc
Pill Identification: 503  |  1MG

What is this Medicine?

GUANFACINE (GWAHN fa seen) is used to treat attention-deficit hyperactivity disorder (ADHD).

In-Depth Information

Guanfacine 1mg Extended-Release Tablet

NDC: 002282850
  • Prescription Required
  • Not a Controlled Drug
    (CSA Schedule)
  • FDA Approved




FDA approved for the following conditions:
Attention-deficit Hyperactivity Disorder (ADHD)

Storage Information
Store at 77 degrees F; excursions permitted to 59-86 degrees F
Guanfacine 1mg Extended-Release Tablet

Reported Side Effects for Guanfacine 1mg Extended-Release Tablet

Difficulty Swallowing Incidence:
<3.0%*
Severity: MODERATE
Onset: DELAYED
Blurred Vision Incidence:
<3.0%*
Severity: MODERATE
Onset: EARLY
Conjunctivitis Incidence:
<3.0%*
Severity: MODERATE
Onset: DELAYED
Diaphoresis Incidence:
<3.0%*
Severity: MILD
Onset: EARLY
Rapid Heart Rate Incidence:
<3.0%*
Severity: MODERATE
Onset: EARLY
Bruises Incidence:
<3.0%*
Severity: MILD
Onset: DELAYED
Inflamed Iris (Eye) Incidence:
<3.0%*
Severity: MODERATE
Onset: DELAYED
Shortness Of Breath Incidence:
<3.0%*
Severity: MODERATE
Onset: EARLY
Exfoliative Dermatitis Incidence:
<3.0%*
Severity: SEVERE
Onset: DELAYED
Upset Stomach Incidence:
1.0-10.0%*
Severity: MILD
Onset: EARLY
Slow Heart Beat Incidence:
1.0-10.0%*
Severity: SEVERE
Onset: RAPID
Constipation Incidence:
1.0-15.0%*
Severity: MODERATE
Onset: DELAYED
Loose Stools Incidence:
1.0-10.0%*
Severity: MILD
Onset: EARLY
Upset Stomach Incidence:
1.0-10.0%*
Severity: MILD
Onset: EARLY
Low Blood Pressure Incidence:
1.0-9.0%*
Severity: MODERATE
Onset: RAPID
Postural Low Blood Pressure Incidence:
1.0-9.0%*
Severity: MODERATE
Onset: DELAYED
Itching Incidence:
1.0-10.0%*
Severity: MILD
Onset: RAPID
Uncontrolled Urination Incidence:
1.0-10.0%*
Severity: MODERATE
Onset: EARLY
High Blood Pressure Incidence:
>2.0%*
Severity: MODERATE
Onset: EARLY
Abnormal Heart Rhythm Incidence:
>2.0%*
Severity: SEVERE
Onset: EARLY
Vomiting Incidence:
>2.0%*
Severity: MILD
Onset: EARLY
Heart Block Incidence:
>2.0%*
Severity: SEVERE
Onset: EARLY
Skin Rash Incidence:
>2.0%*
Severity: MILD
Onset: EARLY
Weight Gain Incidence:
>2.0%*
Severity: MILD
Onset: DELAYED
Dry Mouth Incidence:
2.0-60.0%*
Severity: MILD
Onset: EARLY
Impotence (erectile Dysfunction) Incidence:
3.0-7.0%*
Severity: MODERATE
Onset: DELAYED
Decreased Appetite Incidence:
4.0-15.0%*
Severity: MILD
Onset: DELAYED
Stomach Pain Incidence:
>10.0%*
Severity: MILD
Onset: EARLY
*This is an approximate aggregated range of reported side effects from clinical studies performed on this drug. Your experience with this drug may be different.
Daily Life Interactions for Guanfacine 1mg Extended-Release Tablet

Elements of your daily lifestyle may have an effect on the medications you are taking. Drug interactions can result in unwanted side effects, reduce the effectiveness of your medicine or possibly increase the action of a particular medicine.

Major Lifestyle Interaction
Grapefruit juice and Guanfacine 1mg Extended-Release Tablet(Guanfacine Hydrochloride)
Grapefruit juice and Guanfacine(Guanfacine Hydrochloride)
Do not take these agents together without approval from your prescriber. Taking these agents together could result in serious side effects such as dizziness; feeling faint or lightheaded, falls; unusually weak or tired; unusually slow heartbeat. Report any of these effects immediately should they occur.
Moderate Lifestyle Interaction
Alcohol and Guanfacine 1mg Extended-Release Tablet(Guanfacine Hydrochloride)
Alcohol and Antihypertensives(Guanfacine Hydrochloride)
Although an interaction is possible, Ethanol (alchohol) and Antihypertensive Agents (drugs used to reduce high blood pressure) may be used together. Ethanol or alchohol-containing beverages may increase the effects of Antihypertensive Agents on your blood pressure. If the blood pressure drops too low while taking Ethanol and Antihypertensive Agents, you may become dizzy or feel faint. To limit this interaction, avoid alcohol-containing beverages while taking medicines to lower your blood pressure. Do not stand or sit up too quickly. Contact your prescriber if you have dizziness which does not go away.
Pregnancy & Lactation Information
FIRST Trimester

Class B - Animal studies have revealed no evidence of harm to the fetus, however, there are no adequate and well-controlled studies in pregnant women. OR Animal studies have shown an adverse effect, but adequate and well-controlled studies in pregnant women have failed to demonstrate a risk to the fetus in any trimester.

SECOND Trimester

Class B - Animal studies have revealed no evidence of harm to the fetus, however, there are no adequate and well-controlled studies in pregnant women. OR Animal studies have shown an adverse effect, but adequate and well-controlled studies in pregnant women have failed to demonstrate a risk to the fetus in any trimester.

THIRD Trimester

Class B - Animal studies have revealed no evidence of harm to the fetus, however, there are no adequate and well-controlled studies in pregnant women. OR Animal studies have shown an adverse effect, but adequate and well-controlled studies in pregnant women have failed to demonstrate a risk to the fetus in any trimester.


Learning More About
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Patient Experiences with Guanfacine

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