Generic Name: clonidine (oral) (KLOE ni deen)
Brand Names: Catapres, Kapvay
Medically reviewed on March 23, 2018.
What is Kapvay?
Kapvay (clonidine) is a prescription medicine supplied as an extended-release tablet and is used to treat attention deficit hyperactivity disorder (ADHD). Your doctor may prescribe Kapvay alone or together with certain other ADHD medicines. Clonidine is not a central nervous system (CNS) stimulant.
Kapvay may also be used for purposes not listed in this medication guide.
Before you take Kapvay, tell your doctor if you have heart disease or severe coronary artery disease, a heart rhythm disorder, slow heartbeats, low blood pressure, a history of heart attack or stroke, kidney disease, or if you have ever had an allergic reaction to a clonidine transdermal skin patch (Catapres TTS).
Before taking this medicine
You should not take Kapvay if you are allergic to clonidine.
To make sure Kapvay is safe for you, tell your doctor if you have:
heart disease or severe coronary artery disease;
heart rhythm disorder, slow heartbeats;
low blood pressure, or a history of fainting spells;
a history of heart attack or stroke;
pheochromocytoma (tumor of the adrenal gland);
kidney disease; or
if you have ever had an allergic reaction to a clonidine transdermal skin patch (Catapres TTS).
Older adults may be more sensitive to the effects of this medicine.
It is not known whether Kapvay will harm an unborn baby. Tell your doctor if you are pregnant or plan to become pregnant while taking Kapvay.
Clonidine can pass into breast milk and may harm a nursing baby. Tell your doctor if you are breast-feeding a baby.
Do not give Kapvay to a child younger than 6 years old.
How should I take Kapvay?
Take Kapvay exactly as it was prescribed for you. Follow all directions on your prescription label. Your doctor may occasionally change your dose to make sure you get the best results. Do not take this medicine in larger or smaller amounts or for longer than recommended.
Kapvay is usually taken in the morning and at bedtime. If you take different doses of this medicine at each dosing time, it may be best to take the larger dose at bedtime.
Kapvay may be taken with or without food.
Do not use two forms of clonidine at the same time. The Catapres brand of clonidine is used to treat hypertension (high blood pressure). The Kapvay brand is used to treat attention deficit hyperactivity disorder (ADHD).
Do not crush, chew, or break an extended-release Kapvay tablet. Swallow it whole. Tell your doctor if you have trouble swallowing the tablet.
If you need surgery, tell the surgeon ahead of time that you are using Kapvay. You may need to stop using the medicine for a short time.
Do not stop using Kapvay suddenly, or you could have unpleasant withdrawal symptoms. Ask your doctor how to safely stop using this medicine.
Call your doctor if you are sick with vomiting. Prolonged illness can make it harder for your body to absorb clonidine, which may lead to withdrawal symptoms. This is especially important for a child taking Kapvay.
If you are being treated for high blood pressure, keep using this medication even if you feel well. High blood pressure often has no symptoms. You may need to use blood pressure medication for the rest of your life.
Store at room temperature away from moisture, heat, and light.
See also: Dosage Information (in more detail)
What happens if I miss a dose?
Take the missed dose as soon as you remember. Skip the missed dose if it is almost time for your next scheduled dose. Do not take extra medicine to make up the missed dose.
What happens if I overdose?
Seek emergency medical attention or call the Poison Help line at 1-800-222-1222.
Overdose symptoms may include dangerously high blood pressure (severe headache, pounding in your neck or ears, nosebleed, anxiety, chest pain, shortness of breath) followed by low blood pressure (feeling like you might pass out). Other overdose symptoms may include feeling cold, extreme weakness or drowsiness, weak or shallow breathing, pinpoint pupils, fainting, or seizure (convulsions).
What should I avoid while taking Kapvay?
Avoid drinking alcohol. It may increase certain side effects of Kapvay.
See also: Kapvay and alcohol (in more detail)
Kapvay may impair your thinking or reactions. Avoid driving or operating machinery until you know how this medicine will affect you. Dizziness or severe drowsiness can cause falls or other accidents.
Kapvay side effects
Get emergency medical help if you have signs of an allergic reaction to Kapvay: hives; difficult breathing; swelling of your face, lips, tongue, or throat.
Call your doctor at once if you have:
severe chest pain, shortness of breath, irregular heartbeats;
a very slow heart rate;
severe headache, pounding in your neck or ears, blurred vision;
anxiety, confusion; or
a light-headed feeling, like you might pass out.
Serious side effects may be more likely in older adults.
Common Kapvay side effects may include:
feeling tired or irritable;
dry mouth, loss of appetite;
dry eyes, contact lens discomfort; or
sleep problems (insomnia), nightmares.
This is not a complete list of side effects and others may occur. Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088.
See also: Side effects (in more detail)
What other drugs will affect Kapvay?
Taking this medicine with other drugs that make you sleepy can worsen this effect. Ask your doctor before taking Kapvay with a sleeping pill, narcotic pain medicine, muscle relaxer, or medicine for anxiety, depression, or seizures.
Tell your doctor about all your current medicines and any you start or stop using, especially:
other heart or blood pressure medications;
an antidepressant; or
any other medicine that contains clonidine.
This list is not complete. Other drugs may interact with clonidine, including prescription and over-the-counter medicines, vitamins, and herbal products. Not all possible interactions are listed in this medication guide.
Remember, keep this and all other medicines out of the reach of children, never share your medicines with others, and use Kapvay only for the indication prescribed.
Always consult your healthcare provider to ensure the information displayed on this page applies to your personal circumstances.
Copyright 1996-2018 Cerner Multum, Inc. Version: 9.01.
More about Kapvay (clonidine)
- Side Effects
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- Dosage Information
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- Drug class: antiadrenergic agents, centrally acting