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Intuniv (Guanfacine Hydrochloride ER)

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Full information about Intuniv

General Information on Intuniv

Intuniv is indicated for the treatment of ADHD, or attention deficit hyperactivity disorder, in children in age bracket 6 to 17 years. The generic name of this drug is Guanfacine. It is meant for oral administration only.

Intuniv works by reducing nerve impulses. It is available in form of extended release oral tablets. Intuniv is available in the following strengths: Intuniv 1 mg, Intuniv 2 mg, Intuniv 3 mg, and Intuniv 4 mg. As it is a prescription drug, you require a doctor’s prescription to buy Intuniv.

In addition to guanfacine HCI, the active ingredient of the preparation, Intuniv oral tablets also contains the following excipients: methacrylic acid, hypromellose, lactose, copolymer, crospovidone, povidone, fumaric acid, glyceryl behenate, and microcrystalline cellulose.

Side effects of Intuniv

You should not buy Intuniv if you are allergic to any ingredient used in its preparation. An allergic reaction to Intuniv may cause serious side effects such as facial flushing, hives, swelling of the throat, lips, or tongue, wheezing, difficulty breathing, or closing of the throat.

Before you start treatment, discuss the risks associated with this drug with your doctor. Some common side effects of Intuniv include: stomach pain, constipation, dry mouth, tired feeling, headache, drowsiness, dizziness, feeling irritable, dry mouth, or weight gain. If you experience any of these side effects, consult your doctor.

Some other side effects of Intuniv are: tingling or numbness, slow or fast heart rate, chest tightness, or pounding heartbeats. You should seek immediate medical attention if you experience any of these severe side effects.

Before starting treatment, inform your doctor about your medical history, especially of any: liver disease, kidney disease, low heart rate, low blood pressure, heart block, or heart disease. In presence of any of these conditions, your doctor may adjust your Intuniv dosage or ask you to undergo certain tests to establish the safety of treatment.

Dosage of Intuniv

The recommended starting dosage is Intuniv 1 mg per day. Your doctor, if he/she feels the need, may gradually increase the dosage. The recommended maintenance dosage range is Intuniv 1 mg to 4 mg per day.

You should store Intuniv oral tablets at room temperature at 20°-30°C. Keep the tablets away from heat, moisture, and dust.


Certain drugs may interact with Intuniv, reducing its effectiveness and/or increasing the risk of some of its side effects. Some drugs that are expected to interact with Intuniv extended release oral tablets are: bosentan, St. John’s wort, antibiotics like rifampin, clarithromycin, telithromycin, erythromycin, or dalfopristin, valproic acid, diclofenac, conivaptan, antidepressants like nefazodone, calcium channel blockers like felodipine, diltiazem, verapamil, or nifedipine, seizure medicines like primidone, phenytoin, carbamazepine, oxcarbazepine, or felbamate, HIV medicines like saquinavir, atazanavir, nelfinavir, indinavir, ritonavir, nevirapine, fosamprenavir, or etravirine, barbiturates like phenobarbital, secobarbital, or pentobarbital, and antifungal medicines like voriconazole, itraconazole, or ketoconazole.

This is not a complete list of drugs that may interact with Intuniv. To prevent any unwanted drug interactions while you are using Intuniv, you should tell your doctor, in advance, about all the drugs that you are taking. This includes all prescription, herbal, and non-prescription drugs. Also you must consult your doctor before starting a new medication.

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