Nichiridamol tablets


  • Active Ingredient: Dipyridamole
  • 100 mg, 25 mg
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What is Nichiridamol?

The active ingredient of Nichiridamol brand is dipyridamole. Dipyridamole helps to prevent platelets in your blood from sticking together and forming a blood clot on or around an artificial heart valve. C24H40N8O4 M.W. 504.63 Dipyridamole, USP is an odorless yellow crystalline powder, having a bitter taste. It is soluble in dilute acids, methanol and chloroform, and practically insoluble in water. Each Dipyridamole tablet USP, for oral administration, contains 25 mg, 50 mg, or 75 mg Dipyridamole, USP and contains the following inactive ingredients: colloidal silicon dioxide, hypromellose, lactose anhydrous, magnesium stearate, microcrystalline cellulose, polyethylene glycol, polysorbate 80, propylene glycol, stearic acid, sodium starch glycolate, and titanium dioxide.

Used for

Nichiridamol is used to treat diseases such as: Prosthetic Heart Valves - Thrombosis Prophylaxis, Radionuclide Myocardial Perfusion Study.

Side Effect

Possible side effects of Nichiridamol include: tightness or swelling of neck; dizziness or lightheadedness; headache; gallstones; nausea or vomiting; Flushing; hair loss; weakness.

How to Buy Nichiridamol tablets online?

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Coronary Artery Disease: Nichiridamol has a vasodilatory effect and should be used with caution in patients with severe coronary artery disease (e.g., unstable angina or recently sustained myocardial infarction). Chest pain may be aggravated in patients with underlying coronary artery disease who are receiving Nichiridamol.

Hepatic Insufficiency: Elevations of hepatic enzymes and hepatic failure have been reported in association with Nichiridamol administration.

Hypotension: Nichiridamol should be used with caution in patients with hypotension since it can produce peripheral vasodilation.

What to do about:

  • feeling sick (nausea) - try taking your tablets with or after a meal or snack. It may also help if you don't eat rich or spicy food.
  • diarrhoea and being sick (vomiting) - drink plenty of water in small, frequent sips. Speak to a pharmacist if you have signs of dehydration, such as peeing less than usual or having dark, strong-smelling pee. Don't take any other medicines to treat diarrhoea or vomiting without speaking to a pharmacist or doctor.
  • headaches - make sure you rest and drink plenty of fluids. Don't drink too much alcohol. Ask your pharmacist to recommend a painkiller. Talk to your doctor if the headaches are severe or last longer than a week.
  • feeling dizzy - if Nichiridamol makes you feel dizzy when you stand up, try getting up very slowly or stay sitting down until you feel better. If you begin to feel dizzy, lie down so that you don't faint, then sit until you feel better. Don't drive or use tools or machines if you feel dizzy or a bit shaky.
  • feeling hot and flushed - try cutting down on coffee, tea and alcohol. It might help to keep the room cool and use a fan. You could also spray your face with cool water or sip cold or iced drinks. The flushing should go away after a few days. If it doesn't, or if it's causing you problems, contact your doctor.

A phosphodiesterase inhibitor that blocks uptake and metabolism of adenosine by erythrocytes and vascular endothelial cells. Nichiridamol also potentiates the antiaggregating action of prostacyclin. (From AMA Drug Evaluations Annual, 1994, p752)

Pharmacokinetics and Metabolism

Following an oral dose of Nichiridamol tablets, the average time to peak concentration is about 75 minutes. The decline in plasma concentration following a dose of Nichiridamol tablets fits a two-compartment model. The alpha half-life (the initial decline following peak concentration) is approximately 40 minutes. The beta half-life (the terminal decline in plasma concentration) is approximately 10 hours. Nichiridamol is highly bound to plasma proteins. It is metabolized in the liver where it is conjugated as a glucuronide and excreted with the bile.


In dogs intraduodenal doses of Nichiridamol of 0.5 to 4 mg/kg produced dose-related decreases in systemic and coronary vascular resistance leading to decreases in systemic blood pressure and increases in coronary blood flow. Onset of action was in about 24 minutes and effects persisted for about 3 hours.

Similar effects were observed following IV Nichiridamol in doses ranging from 0.025 to 2 mg/kg.

In man the same qualitative hemodynamic effects have been observed. However, acute intravenous administration of Nichiridamol may worsen regional myocardial perfusion distal to partial occlusion of coronary arteries.

What Is Dipyr >

Nichiridamol helps to prevent platelets in your blood from sticking together and forming a blood clot on or around an artificial heart valve.

Nichiridamol is used to prevent blood clots after heart valve replacement surgery.

Nichiridamol may also be used for other purposes not listed in this medication guide.

Follow all directions on your medicine label and package. Tell each of your healthcare providers about all your medical conditions, allergies, and all medicines you use.

You should not use Nichiridamol if you are allergic to it.

To make sure Nichiridamol is safe for you, tell your doctor if you have:

  • coronary artery disease (hardened arteries);
  • liver disease;
  • low blood pressure;
  • uncontrolled chest pain (angina); or
  • if you have recently had a heart attack.

This medicine is not expected to harm an unborn baby. Tell your doctor if you are pregnant or plan to become pregnant.

Nichiridamol can pass into breast milk and may harm a nursing baby. Tell your doctor if you are breast-feeding a baby.

Nichiridamol should not be given to a child younger than 12 years old.

Taking Nichiridamol with indigestion medicines

Some indigestion medicines, such as omeprazole, may reduce the effect of Nichiridamol. This is important if you're taking Nichiridamol as tablets or liquid, but it's not a problem if you're taking capsules.

If you need to take indigestion medicines, do not take them at the same time of day as Nichiridamol. Take them 2 to 3 hours before or after your dose of Nichiridamol.

1. About dipyr >

Nichiridamol is an antiplatelet medicine, or blood thinner. It makes your blood flow through your veins more easily. This means your blood will be less likely to make a dangerous blood clot.

Taking Nichiridamol helps to prevent blood clots if you have an increased risk of having them. Your risk is higher if you have or have had:

Nichiridamol is only available on prescription.

It comes as tablets and slow-release (called "modified-release") capsules. It is also available as a liquid if you find it difficult to swallow tablets or capsules.

What Is Aggrenox (Aspirin Dipyr >

Aggrenox is the brand name for a combination medicine that contains the drugs aspirin and Nichiridamol.

This prescription medication is used to reduce the risk of stroke in people who have already had a transient ischemic attack (TIA or "mini-stroke") or a stroke due to a blood clot.

According to the Centers for Disease Control and Prevention (CDC), stroke is the third leading cause of death in the United States. More than 140,000 people die each year from a stroke.

Aggrenox is in a class of drugs known as antiplatelet agents. It works by preventing blood from clotting.

The Food and Drug Administration (FDA) approved Aggrenox in 1999. It's manufactured by Boehringer Ingelheim Pharmaceuticals, Inc.

Following an oral dose of Nichiridamol tablets, the average time to peak concentration is about 75 minutes. The decline in plasma concentration fits a two-compartment model with an α half-life (initial decline following peak concentration) of 40 minutes and a β half-life of 10 hours. This is consistent with the twice-daily regimen used in recent clinical studies.

Absorption of Nichiridamol from conventional formulations is quite variable and can result in low systemic bioavailability. A modified-release formulation of Nichiridamol with improved bioavailability has been developed. Nichiridamol is highly bound to plasma proteins, and is metabolized in the liver where it is conjugated to a glucuronide and excreted in the bile. It is subject to enterohepatic recirculation.

Dipyr >

Follow all directions on your prescription label. Do not take this medicine in larger or smaller amounts or for longer than recommended.

Nichiridamol is often taken together with other medications to prevent blood clots. To best treat your condition, use all medications as directed by your doctor. Read the medication guide or patient instructions provided with each medication. Do not change your doses or medication schedule without your doctor's advice.

While using Nichiridamol, you may need frequent blood tests.

Store at room temperature away from moisture and heat.

Seek emergency medical attention or call the Poison Help line at 1-800-222-1222.

Overdose symptoms may include flushing (warmth, redness, or tingly feeling), restless feeling, sweating, weakness, or fainting.

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.

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Latest Update: 11/9/2018, Version: 5.02

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