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Catapres TTS (Clonidine)

Prescription requiredOnly Available By Prescription
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Top Generic choice

What is Generic?

What is a Generic Drug?

A generic drug is a copy of the brand-name drug with the same dosage, safety, strength, quality, consumption method, performance, and intended use. Before generics become available on the market, the generic company must prove it has the same active ingredients as the brand-name drug and works in the same way and in the same amount of time in the body.

The only differences between generics and their brand-name counterparts is that generics are less expensive and may look slightly different (eg. different shape or color), as trademarks laws prevent a generic from looking exactly like the brand-name drug.

Generics are less expensive because generic manufacturers don't have to invest large sums of money to develop a drug. When the brand-name patent expires, generic companies can manufacture a copy of the brand-name and sell it at a substantial discount.


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Catapres TTS (Clonidine) is mainly used to manage high blood pressure and is classified under the drug group called alpha agonists. By affecting the levels of certain chemicals in the blood, Catapres TTS helps to relax and widen blood vessels, thereby lowering blood pressure and reducing the risks associated with hypertension such as strokes and heart attacks.

Before you buy Catapres TTS and Catapres TTS generic for the treatment of blood pressure, it is crucial that you talk to your healthcare provider about its effectiveness and affordability.

Fact Table
Formula C9H9Cl2N3
License FDA approved
Bioavailability Approximately 75-95% (oral), variable in transdermal form
Legal status Prescription only
Chemical Name Clonidine
Elimination half-life 12-16 hours (oral); 41 hours (transdermal)
Dosage (Strength) Transdermal patches: 0.1 mg/day, 0.2 mg/day, 0.3 mg/day
Pregnancy advice Category C (Risk not ruled out)
Brands Catapres TTS
Protein binding 20-40%
PubChem CID 2803
MedlinePlus a682243
ChEBI 3759
ATC code C02AC01
DrugBank DB00575
KEGG D00281
Routes of administration Oral, transdermal

Buy Catapres TTS (Clonidine) online from online Canadian Pharmacy |


Make sure your skin is clean and completely dry before placing the patch.

Choose an area on your upper outer arm or chest. Change the placement area every time you apply a fresh patch.

Remove the patch from its protective liner and press it onto the skin with the sticky side down. Hold for 10 seconds.

Wear the patch continuously until it's time for a replacement (usually once a week).

When replacing, remove the old patch and dispose of it safely, then apply a new patch to a different skin area.


Active Ingredient: Clonidine


Do not use Catapres TTS patch if you are allergic to Clonidine or any of the inactive ingredients.

Inform your doctor if you have a history of heart or kidney problems, depression, or any other medical conditions.

Avoid alcohol and other sedatives while on this medication as they can enhance drowsiness.

Do not stop using Catapres TTS suddenly without consulting your doctor as it can lead to increased blood pressure.


Catapres TTS may have interactions with various medications, such as other hypertension treatments, alcohol, calming agents, and specific antidepressants. It's crucial to notify your physician about every medication and supplement you're using, even those bought without a prescription.

Side Effects

Common side effects may include:

  • Drowsiness or dizziness
  • Dry mouth
  • Constipation
  • Fatigue
  • Headache

Remember, these are not exhaustive lists, and it's important to consult with a healthcare professional for personalized advice and guidance. If you prefer, you may contact the U.S. Food and Drug Administration (FDA) directly. Visit or call 1-800-FDA-1088

Frequently Asked Questions about Catapres

How to take Catapres under the tongue?

Catapres TTS is designed for transdermal use (applied to the skin). If you have been prescribed oral Catapres, place the tablet under the tongue and allow it to dissolve. Avoid swallowing, biting, or breaking the tablet.

Can Catapres lower blood pressure?

Yes, Catapres TTS is primarily prescribed to treat high blood pressure. It helps relax and widen blood vessels, leading to a reduction in blood pressure.

Can I take Losartan and Catapres at the same time?

Both Losartan and Catapres are used to treat high blood pressure. Taking them together may enhance their effects and lower your blood pressure too much. Always seek your physician's advice before mixing drugs.

Does Catapres cause weight gain?

Weight gain is not a common side effect of Catapres. However, individual reactions can vary. If you notice significant weight gain after starting Catapres, consult your doctor.

Does Catapres help you sleep?

Catapres can cause drowsiness as a side effect, and in some cases, it has been prescribed off-label to aid in sleep. However, it's essential to use the medication as directed by your doctor.

IMPORTANT NOTE: The above information is intended to increase awareness of health information and does not suggest treatment or diagnosis. This information is not a substitute for individual medical attention and should not be construed to indicate that use of the drug is safe, appropriate, or effective for you. See your health care professional for medical advice and treatment.