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What is Rythmodan?

Rythmodan (Disopyramide) belongs to the class of medications called antiarrhythmics. It is used to treat abnormal heart rhythms.

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Rythmodan (Disopyramide) belongs to the class of medications called antiarrhythmics. It is used to treat abnormal heart rhythms. It works in various areas of the heart to help normalize abnormal heart rhythms.

Rythmodan (Disopyramide) may be available under multiple brand names and/or in several different forms. Any specific brand name of Rythmodan (Disopyramide) may not be available in all of the forms or approved for all of the conditions discussed here. As well, some forms of Rythmodan (Disopyramide) may not be used for all of the conditions discussed here.

Your doctor may have suggested Rythmodan (Disopyramide) for conditions other than those listed in these drug information articles. If you have not discussed this with your doctor or are not sure why you are taking Rythmodan (Disopyramide), speak to your doctor. Do not stop taking Rythmodan (Disopyramide) without consulting your doctor.

Do not give Rythmodan (Disopyramide) to anyone else, even if they have the same symptoms as you do. It can be harmful for people to take Rythmodan (Disopyramide) if their doctor has not prescribed it.



The dose of Rythmodan (Disopyramide) is individualized for each person, depending on the person's weight and response to the medication. The usual dose of Rythmodan (Disopyramide) capsules is 100 mg to 200 mg every 6 hours. In certain circumstances, the doctor may start with a higher dose for the first dose only. People with reduced kidney or liver function may need lower daily doses.

Many things can affect the dose of a medication that a person needs, such as body weight, other medical conditions, and other medications. If your doctor has recommended a dose different from the ones listed here, do not change the way that you are taking the medication without consulting your doctor.

It is important to take Rythmodan (Disopyramide) exactly as prescribed by your doctor. If you miss a dose, take it as soon as possible and continue with your regular schedule. If it is almost time for your next dose, skip the missed dose and continue with your regular dosing schedule. Do not take a double dose to make up for a missed one. If you are not sure what to do after missing a dose, contact your doctor or pharmacist for advice.

Store Rythmodan (Disopyramide) at room temperature and keep it out of the reach of children.

Do not dispose of medications in wastewater (e.g. down the sink or in the toilet) or in household garbage. Ask your pharmacist how to dispose of medications that are no longer needed or have expired.


Side Effects

Many medications can cause side effects. A side effect is an unwanted response to a medication when it is taken in normal doses. Side effects can be mild or severe, temporary or permanent.

The side effects listed below are not experienced by everyone who takes Rythmodan (Disopyramide). If you are concerned about side effects, discuss the risks and benefits of this medication with your doctor.

The following side effects have been reported by at least 1% of people taking Rythmodan (Disopyramide). Many of these side effects can be managed, and some may go away on their own over time.

Contact your doctor if you experience these side effects and they are severe or bothersome. Your pharmacist may be able to advise you on managing side effects.

  • blurred vision
  • changes in taste
  • Constipation
  • Diarrhea
  • drowsiness
  • dry eyes
  • Dry Mouth, nose, or throat
  • gas
  • increased sweating
  • indigestion
  • loss of appetite
  • nausea
  • vomiting

Although most of these side effects listed below don't happen very often, they could lead to serious problems if you do seek medical attention.

Check with your doctor as soon as possible if any of the following side effects occur:

  • bluish lips
  • chest pain
  • dizziness or lightheadedness
  • difficulty urinating
  • feeling faint or fainting
  • heartbeat that is much faster or slower than usual
  • increased sensitivity of the skin to the sun
  • pounding heartbeat
  • rash or itching
  • signs of heart failure (e.g., shortness of breath, fatigue, swelling in legs, ankles, feet, rapid weight gain
  • symptoms of low blood sugar (e.g., cold sweat, cool pale skin, headache, fast heart beat, weakness)

Stop taking the medication and seek immediate medical attention if any of the following occur:

  • signs of a severe allergic reactions (e.g., Hives, difficulty breathing, swelling of the mouth or throat)

Some people may experience side effects other than those listed. Check with your doctor if you notice any symptom that worries you while you are taking Rythmodan (Disopyramide).


Available form

100 mg
Each green-and-yellow, hard gelatin capsule, marked "RY RL", contains Rythmodan (Disopyramide) 100 mg. Nonmedicinal ingredients: cornstarch, magnesium stearate, pregelatinized starch, and talc; capsule body and head: FD&C Blue No. 2, gelatin, titanium dioxide, and yellow iron oxide.



Do not take this medication if you:

  • are allergic to Rythmodan (Disopyramide) or any ingredients of the medication
  • are in shock
  • are taking other medications to treat abnormal heart rhythms or medications that may cause abnormal heart rhythms (e.g., Amiodarone, quinidine, Sotalol, Verapamil, Diltiazem, Pimozide)
  • have cardiomyopathy (a disease of the heart muscle)
  • have certain severe heart rhythm disorders (i.e., bundle-branch block associated with first-degree AV block, double block, or second- and third-degree AV block with no pacemaker)
  • have extensive heart disease
  • have Glaucoma
  • have kidney failure
  • have long QT interval
  • have severe or uncontrolled Congestive Heart Failure
  • have severe sinus node (the heart's natural pacemaker) dysfunction
  • have urinary retention



There may be an interaction between Rythmodan (Disopyramide) and any of the following:

If you are taking any of these medications, speak with your doctor or pharmacist. Depending on your specific circumstances, your doctor may want you to:

  • stop taking one of the medications,
  • change one of the medications to another,
  • change how you are taking one or both of the medications, or
  • leave everything as is.

An interaction between two medications does not always mean that you must stop taking one of them. Speak to your doctor about how any drug interactions are being managed or should be managed.

Medications other than those listed above may interact with Rythmodan (Disopyramide). Tell your doctor or prescriber about all prescription, over-the-counter (non-prescription), and herbal medications you are taking. Also tell them about any supplements you take. Since caffeine, alcohol, the Nicotine from cigarettes, or street drugs can affect the action of many medications, you should let your prescriber know if you use them.



Before you begin using a medication, be sure to inform your doctor of any medical conditions or Allergies you may have, any medications you are taking, whether you are pregnant or breast-feeding, and any other significant facts about your health. These factors may affect how you should use Rythmodan (Disopyramide).

Abnormal heart rhythms: Certain medications used to treat abnormal heart rhythms, including Rythmodan (Disopyramide), can also cause new abnormal heart rhythms, some of which can be life-threatening. Treatment with Rythmodan (Disopyramide) should be started in the hospital, where appropriate monitoring and treatment can be provided.

Certain medications (e.g., sotalol, quinidine, thioridazine, Chlorpromazine, droperidol, pimozide, moxifloxacin, Mefloquine, pentamidine, arsenic trioxide, , probucol, Tacrolimus) can increase the risk of a type of abnormal heart rhythm called QT prolongation, and should not be used in combination with Rythmodan (Disopyramide). If you are taking other medications, discuss with your doctor how Rythmodan (Disopyramide) may affect your medical condition, how your medical condition may affect the dosing and effectiveness of Rythmodan (Disopyramide), and whether any special monitoring is needed.

Glaucoma: Rythmodan (Disopyramide) may cause an increase in the pressure inside the eye and should not be used by people with glaucoma. If you have a family history of glaucoma, your doctor will monitor you closely while taking this medication.

Heart failure: Rythmodan (Disopyramide) can cause or worsen heart failure because it can reduce the strength of the heart muscle’s contraction. It should not be used by people with severe or untreated heart failure. If you have heart failure and are taking Rythmodan (Disopyramide), your doctor will monitor you closely during treatment. If you notice shortness of breath; weight gain; or swelling in the hands, feet, or lower legs while taking Rythmodan (Disopyramide), contact your doctor immediately.

Kidney function: Decreased kidney function can cause Rythmodan (Disopyramide) to build up in the body, causing side effects. If you have reduced kidney function or Kidney Disease, discuss with your doctor how Rythmodan (Disopyramide) may affect your medical condition, how your medical condition may affect the dosing and effectiveness of this medication, and whether any special monitoring is needed.

Liver function: Liver disease or reduced liver function may cause Rythmodan (Disopyramide) to build up in the body, causing side effects. If you have liver problems, discuss with your doctor how Rythmodan (Disopyramide) may affect your medical condition, how your medical condition may affect the dosing and effectiveness of Rythmodan (Disopyramide), and whether any special monitoring is needed. Your doctor may want to test your liver function regularly with blood tests while you are taking Rythmodan (Disopyramide).

Low Blood Pressure: Rythmodan (Disopyramide) may cause low blood pressure. If you experience dizziness, lightheadedness, or fainting while taking Rythmodan (Disopyramide), contact your doctor immediately.

Low blood sugar: Rythmodan (Disopyramide) can cause low blood sugar, especially for people with certain medical conditions (e.g., heart failure, treated Diabetes, chronic malnutrition, liver disease, kidney disease) or who are taking certain medications (e.g., Atenolol, Propranolol, Metoprolol). If you are at risk of experiencing low blood sugar while taking Rythmodan (Disopyramide), your doctor will monitor your blood sugar closely during treatment.

Myasthenia Gravis: Myasthenia gravis is a condition that causes specific muscle weakness. Rythmodan (Disopyramide) may make the symptoms of myasthenia gravis worse. If you have myasthenia gravis, discuss with your doctor how Rythmodan (Disopyramide) may affect your medical condition, how your medical condition may affect the dosing and effectiveness of this medication, and whether any special monitoring is needed.

Reduced concentration: Rythmodan (Disopyramide) may reduce the ability to concentrate and react. Do not drive or operate machinery until you know how this medication affects you.

Urinary retention: Rythmodan (Disopyramide) may cause urinary retention. This is more likely to affect men with an enlarged prostate gland, however it can also affect women. If you experience any difficulties with urination while taking Rythmodan (Disopyramide), contact your doctor.

Pregnancy: Rythmodan (Disopyramide) should not be used during pregnancy unless the benefits outweigh the risks. If you become pregnant while taking Rythmodan (Disopyramide), contact your doctor immediately.

Breast-feeding: Rythmodan (Disopyramide) passes into breast milk. If you are a breast-feeding mother and are taking Rythmodan (Disopyramide), it may affect your baby. Talk to your doctor about whether you should continue breast-feeding.

Children: The safety and effectiveness of using this medication have not been established for children.

Seniors: Seniors may experience memory problems and confusion when using Rythmodan (Disopyramide).

Rythmodan frequently asked questions

How To Buy Rythmodan Online?

You can buy Rythmodan online at PocketPills if you already have a valid prescription from your doctor. You can get started by uploading your prescription, ordering a refill by transferring any existing medications to our pharmacy or talking to one of our Canadian Doctors to get an online prescription. Get started now!

How To Get a Prescription for Rythmodan?

You can consult a Canadian doctor online at pocketpills.com. Our physicians can prescribe medications online during your consultation. Once you receive a prescription, you'll have the option to have it delivered to your door in discreet packaging and at no additional cost!. Click here to get an online prescription today!

Can I Get Same-Day Delivery?

Yes! We do provide same-day delivery in select areas. We do next business day delivery and can also ship overnight as well.

How Much is Shipping Cost for Rythmodan in Canada?

Shipping cost for Rythmodan to you in Canada is zero. Pocketpills offers FREE shipping anywhere in Canada and low dispensing fees to help you get access to treatment.

How to get Rythmodan delivered to my home?

You could get Rythmodan delivered at your doorstep from us in Canada if you ordered prescription medications with a valid prescription. If you are not sure if we deliver to your area, contact us.

How to get Rythmodan in Canada for free?

You can get Rythmodan for free in Canada if your health insurance provider covers it fully. Contact your provider or us to help you find out if you qualify to get Rythmodan for free.

Can I consult a doctor online to get Rythmodan?

Yes. You can book a consultation online with a Canadian doctor here with us at PocketPills to see if you qualify for a prescription to order Rythmodan.

Can I buy Rythmodan without a prescription?

You need a valid prescription to buy Rythmodan from us. Contact us if you need a prescription. One of our doctors can give you a telephone call at your convenience.


All material © 1996-2021 MediResource Inc. Terms and conditions of use. The contents herein are for informational purposes only. Always seek the advice of your physician or other qualified health providers with any questions you may have regarding a medical condition.

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