Intuniv (Guanfacine)

Guanfacine is marketed as the drug Intuniv. Intuniv is used alone or combined with other medications to treat symptoms of high blood pressure. Intuniv is in a class of medication called centrally acting alpha 2A adrenergic receptors antagonists. It works by relaxing the blood vessels so that blood flows more freely through the body.

Before you take Intuniv tell your doctor about any other medications that you are taking, also tell your doctor about any supplements you might be taking as well. Tell your doctor if you are pregnant, going to become pregnant or are breast feeding. IF you have questions about how to take Intuniv talk to your pharmacist or doctor for clarification.  Do not take more than is prescribed to you, follow the directions exactly. Do not suddenly stop taking Intuniv as this could cause an unsafe rise in blood pressure, your doctor will gradually reduce your dose over time.

Intuniv side effects are not common but may occur. The following side effects should be evaluated by a doctor if they are severe or do not go away after a short period of time. Side effects include:

  • dry mouth
  • tiredness
  • weakness
  • headache
  • irritability
  • decreased sexual ability
  • decreased appetite
  • stomach pain
  • nausea
  • vomiting
  • constipation

The following side effects, if experienced, you should contact a doctor as soon as possible:

  • fainting
  • blurred vision
  • rash
  • slow heart rate

Intuniv may have similar side effect to Concerta. Concerta side effects include:

  • nervousness
  • difficulty falling asleep or staying asleep
  • dizziness
  • nausea
  • vomiting
  • loss of appetite
  • stomach pain
  • diarrhea
  • heartburn
  • dry mouth
  • headache
  • muscle tightness
  • uncontrollable movement of a part of the body
  • restlessness
  • numbness, burning, or tingling in the hands or feet
  • decreased sexual desire
  • painful menstruation

If you experience any of the following side effects while taking concerta contact a doctor.

  • fast, pounding, or irregular heartbeat
  • chest pain
  • shortness of breath
  • excessive tiredness
  • slow or difficult speech
  • fainting
  • weakness or numbness of an arm or leg
  • seizures
  • changes in vision or blurred vision
  • agitation
  • believing things that are not true
  • feeling unusually suspicious of others
  • hallucinating (seeing things or hearing voices that do not exist)
  • motor tics or verbal tics
  • depression
  • abnormally excited mood
  • mood changes
  • fever
  • hives
  • rash
  • blistering or peeling skin
  • itching
  • difficulty breathing or swallowing

If you have any questions about these medications you should talk to your doctor. If anyone that is taking these medications loses consciousness or overdoses call 911.