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clonidine (Catapres) Side Effects, Dosage, Uses & Withdrawal Symptoms

What is clonidine, and how does it work?

  • Clonidine (Catapres, Catapres-TTS) is an oral and topical (applied to the skin) medication prescribed by a doctor for the treatment of high blood pressure (hypertension). It acts by stimulating receptors on nerves in the brain that reduces the transmission of messages from nerves in the brain to nerves in other areas of the body. As a result, it slows heart rate and reduces blood pressure.
  • The FDA approved clonidine in September 1974.

What brand names are available for clonidine?

  • Catapres,Catapres-TTS, and Kapvay are the brand names for this drug available in the U.S. for the treatment of high blood pressure.
  • The brand Jenloga has been discontinued in the U.S.

Is clonidine available as a generic drug?

  • There are generic versions of the tablets and patch.

Do I need a prescription for clonidine?

  • Yes, a prescription by doctor or health care professional is necessary for this drug.

What are the approved uses for clonidine?

What are the FDA non-approved (off-label) uses for clonidine?

Non-FDA approved (off-label) uses for this medication include the treatment of:

It also can be used as an adjunct to manage severe cancer-related pain.




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What are the side effects of clonidine?

The most common side effects are:

Other side effects include:

  • Skin redness
  • Itching
  • Impotence
  • Darkening of skin
  • Decreased sexual desire
  • Ejaculatory dysfunction

Possible serious side effects include:

Severe rebound hypertension can occur following withdrawal from clonidine. This reaction is more likely to occur if clonidine is stopped suddenly (without a gradual dose reduction).

Symptoms of severe rebound high blood pressure can include:

Slowly reducing the dose of this medication over several days will prevent these symptoms.

What is the dosage for clonidine?

  • The usual oral adult dose is 0.1–0.3 mg twice daily.
  • The maximum oral dose is 2.4 mg daily.
  • Topical patches should be applied to an area of hairless skin on the upper arm or torso, once every 7 days.
  • When applying a new topical patch, a different area of skin should be used.

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Which drugs or supplements interact with clonidine?

This drug can increase the sedating effects of other medications that cause sedation. Such drugs include:

Tricyclic antidepressants, for example, amitriptyline (Elavil, Endep), imipramine (Tofranil), desipramine (Norpramin), and clomipramine (Anafranil), can block the blood pressure lowering effects of Catapres. This may cause blood pressure to rise.

Since this drug can reduce heart rate, it should be used cautiously in persons who are receiving any other medication that lowers heart rate such as beta-blockers, for example:

Abnormal heart rhythms can occur with the combination of clonidine and verapamil.

Cyclosporine (Sandimmune, Neoral) concentrations in the blood can increase when clonidine is begun. This interaction could result in kidney damage from the increased levels of cyclosporine.

Nonsteroidal anti-inflammatory drugs (NSAIDs), for example, ibuprofen (Motrin, Advil), naproxen (Naprosyn, Aleve), and nabumetone (Relafen) can reduce the antihypertensive effects of clonidine.

Cocaine, pseudoephedrine, phenylephrine, and phenylpropanolamine also can reverse the blood pressure lowering effects of clonidine.

Is clonidine safe to use during pregnancy or while breastfeeding?

  • There are no adequate studies of this drug in during pregnancy
  • It is excreted into breast milk and potentially could cause adverse effects in the infant.

What else should I know about clonidine?

What preparations of clonidine are available?
  • Tablets (immediate release): 0.1, 0.2, and 0.3 mg.
  • Transdermal patches: 0.1, 0.2, and 0.3 mg delivered over 24 hours.
How should I keep clonidine stored?
  • Tablets and patches should be kept at room temperature, 15 C – 30 C (59 F – 86 F).

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