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Antistenocardin

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Antistenocardin

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Medically reviewed

Marina Burgos

Last updated on 22/12/2025

This page provides general, reference-level information compiled from official medical sources. It is not a substitute for professional medical advice, diagnosis, or treatment. For decisions about your health, please consult a qualified healthcare professional.

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Overview of Antistenocardin

Property Description
Active Ingredient Dipyridamole (INN)
Form Oral tablet, Injectable solution, Capsule (Extended-release)
Pharmacological Class Antiplatelet Agent, Coronary Vasodilator
General Purpose Prevention of unwanted blood clots, support of circulation
Origin Synthetic pyrimidine analogue

Dipyridamole: Definition, Origin, and Available Forms

Antistenocardin is a medicinal preparation defined by its core active substance, Dipyridamole (INN), a synthetic pyrimidine analogue. This compound is classified as a small-molecule drug developed in a laboratory setting. The medication is frequently a prescription-only product and is manufactured in several dosage forms, most commonly as an oral tablet for chronic administration and as a sterile injectable solution for the intravenous route. It is also available as an oral capsule form, often for extended release in fixed combination with acetylsalicylic acid.

What is the Pharmacological Class of Antistenocardin?

Antistenocardin possesses a dual functional classification, categorized as both an antiplatelet agent and a coronary vasodilator. The drug's mechanism involves blocking the cellular reuptake of adenosine into platelets, which leads to reduced platelet reactivity and promotes vasodilation. This unique action of Dipyridamole, involving the accumulation of key signaling molecules, is associated with effectiveness in preventing certain types of blood clots. It has an established application in preventing platelet aggregation and promoting sustained blood flow in the coronary arteries.

General Purpose: Preventing Clot Formation and Supporting Circulation

The general purpose of Antistenocardin is to help maintain consistent blood flow by interfering with the processes that lead to the formation of unwanted blood clots. By inhibiting platelet aggregation and promoting vasodilation, the medication supports vascular patency and reduces the inherent risk of thrombus formation. The classification as a vasodilator indicates that the agent promotes the widening of blood vessels. This pharmacological function positions the agent as a component in long-term preventative strategies aimed at supporting the body's circulation, such as for patients who have undergone mechanical heart valve replacement.

Regulatory References

  1. Dipyridamole - LiverTox - NCBI Bookshelf
  2. Dipyridamole: MedlinePlus Drug Information
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What side effects are possible with Antistenocardin?

Possible Side Effects and Safety Information

Official regulatory documents classify the potential side effects of Dipyridamole (Antistenocardin) based on their frequency and the system-organ class affected. These classifications structure the understanding of the medicine’s risk profile, strictly derived from clinical trial and post-marketing data.


Frequency-Classified Adverse Reactions

The most frequently documented side effects are categorized as Very Common (geq1/10), primarily involving the nervous and gastrointestinal systems. These include Headache, Dizziness, Diarrhea, and Nausea. Reactions classified as Common (geq1/100 to <1/10) include Vomiting, Abdominal Pain, Flushing, and Myalgia.


Serious Adverse Reactions and Safety Constraints

Serious adverse reactions are explicitly documented in regulatory labeling. These include the risk of Intracranial Hemorrhage due to the antiplatelet effect, as well as Hepatic Failure and severe Hypersensitivity Reactions (e.g., severe bronchospasm). The label notes specific Cardiac Events (such as myocardial infarction or cardiac death) associated primarily with the intravenous administration used in diagnostic stress testing.

Regulatory documents outline specific safety considerations for patient populations. Safety and effectiveness are not established in the pediatric population below the age of 12 years. Furthermore, caution is advised for patients with pre-existing conditions like Severe Coronary Artery Disease or Hypotension due to the drug’s vasodilatory properties. The official safety information also notes that if adverse effects occur, they are typically transient and often disappear on long-term use of the oral tablets.

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Overdose and Emergency Response

Overdose Manifestations and Required Emergency Actions

Overdose with Antistenocardin (Dipyridamole) may present with a specific cluster of signs documented in official regulatory labeling. Documented manifestations often relate to the drug's vasodilatory effects and may include generalized flushing, sweating, dizziness, and feelings of weakness or restlessness. Angina complaints have also been reported as part of the presentation.

The most serious outcomes described in the official prescribing information are acute changes in the cardiovascular system, specifically a significant drop in blood pressure (hypotension) and a resulting increase in heart rate (tachycardia).

When to Seek Urgent Help

Any suspected overdose constitutes a medical emergency. Government health authorities mandate that an individual seek immediate medical attention and contact a local Poison Control Center right away. Immediate emergency services must be called if the affected person has collapsed, has trouble breathing, or cannot be awakened, as stated in the official guidance.

Officially Described Supportive Measures

Management procedures described in the official label focus on supportive and symptomatic care. The official label notes that xanthine derivatives, such as aminophylline, may be administered by a healthcare professional to reverse the hemodynamic effects of the drug. Procedural steps may include considering gastric lavage and require continuous ECG monitoring. Regulatory information notes that dialysis is not likely to be of benefit due to the drug’s high protein binding.

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Therapeutic Uses of Antistenocardin

Quick Facts: Uses of Antistenocardin

Therapeutic Domain Benefit Summary
Vascular Health Used as part of a strategy to help reduce the possibility of blood clots.
Surgical Prophylaxis Employed as an adjunct for preventing thromboembolic events following certain surgical procedures, such as cardiac valve replacement.
Cerebrovascular Events May be utilized, often in combination with other agents, for the secondary management of ischemic stroke and transient ischemic attack (TIA) to help reduce the possibility of recurrence.
Diagnostic Use Used in pharmacological stress testing to support the assessment of coronary artery blood flow.

Antistenocardin (Dipyridamole) is a prescribed medication primarily used within a treatment regimen to help manage conditions related to blood vessel health. Its central purpose is to contribute to a reduced possibility of blood clot formation (thromboembolism). This therapeutic effect is most commonly employed as an adjunctive measure in patients who have undergone cardiac valve replacement surgery.

The medication is also utilized in the secondary management of specific cerebrovascular events, such as ischemic stroke or transient ischemic attack (TIA). In this context, it is often administered alongside other therapeutic agents to maintain vascular patency and help reduce the possibility of future incidents.

Furthermore, this drug has a recognized use in the medical setting as a diagnostic aid. It is administered intravenously as part of a pharmacological stress test procedure to support the evaluation of myocardial perfusion (blood flow to the heart muscle). Comprehensive information on the approved uses and related safety data is available through professional medical consultation and official product labeling.

Regulatory References

  1. NIH MedlinePlus guidance
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Eligibility and Restrictions for Use

The eligibility for using Antistenocardin (Dipyridamole) is defined by official regulatory documents, which establish clear restrictions based on patient status, age, and existing medical conditions.

Contraindications and Cautions

Classification Eligibility Rule
Absolute Contraindication Patients with known hypersensitivity to dipyridamole or any product component must not use the medication. Fixed-combination products with aspirin are also contraindicated in patients with active peptic ulcer disease, bleeding disorders, or known allergy to NSAIDs.
Use with Caution Caution is advised for patients with severe coronary artery disease (e.g., unstable angina) and hypotension (low blood pressure), as well as those with myasthenia gravis.
Organ Function Restriction Use is generally avoided or contraindicated in patients with severe hepatic or renal insufficiency, particularly for the extended-release combination product.

Population-Specific Rules

Age and Development: Safety and effectiveness for the conventional tablet form have not been established in children under 12 years of age. Use of the fixed-combination product is generally not recommended in children or teenagers, largely due to the risk of Reye's Syndrome from the aspirin component.

Pregnancy and Lactation: The monotherapy is U.S. Pregnancy Category B, to be used only if clearly needed. The fixed-combination product is Category D. Dipyridamole is excreted into human milk, requiring caution during breastfeeding.

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What should I know about interactions with other medicines?

Interactions with other medicines and products

The interaction profile of Dipyridamole (Antistenocardin) is defined by official regulatory documentation, focusing on effects related to blood clotting, blood vessel dilation, and drug clearance.

Pharmacodynamic and Restriction-Based Interactions

Co-administration with Riociguat is formally contraindicated due to the risk of additive systemic hypotension, as officially stated in labeling. The co-administration with other antiplatelet agents and Anticoagulants (e.g., Warfarin) or NSAIDs results in an increased risk of bleeding due to additive pharmacodynamic effects.

When used for diagnostic procedures, Dipyridamole significantly increases the plasma concentration and effects of Adenosinergic Agents (e.g., Adenosine, Regadenoson), requiring a mandatory procedural constraint: oral Dipyridamole must be interrupted for 48 hours prior to such stress testing. Similarly, Caffeine or other methylxanthines must be avoided before intravenous diagnostic use as they may counteract the drug's effect.

Transporter-Mediated Exposure Changes

Dipyridamole is documented to inhibit the P-glycoprotein ( P-gp) transporter, resulting in increased plasma levels of certain co-administered drugs, such as Betrixaban. Conversely, certain agents like Apalutamide may decrease the systemic exposure of Dipyridamole by inducing the BCRP transporter. Officially documented interactions with Alcohol (heavy use) are noted as a risk factor for increased gastrointestinal bleeding when combined with the aspirin formulation.

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Mechanism of Action

How Antistenocardin Works: Mechanism of Action

Antistenocardin (Dipyridamole) operates primarily through two independent mechanistic domains that modulate cardiovascular function.

First, the drug functions as an inhibitor of Phosphodiesterase (PDE) enzymes, particularly PDE-3 and PDE-5, found within blood platelets. By blocking PDE, the drug prevents the hydrolysis of key intracellular messengers, Cyclic Adenosine Monophosphate (cAMP) and Cyclic Guanine Monophosphate (cGMP), leading to their accumulation. This molecular action restricts calcium mobilization within the platelet, which ultimately results in a reduced tendency for the platelets to aggregate, establishing an anti-aggregation state.

Second, the drug increases the local availability of the nucleoside Adenosine by blocking the transporter protein responsible for its cellular reuptake and inhibiting its breakdown by Adenosine Deaminase. The resulting elevation of extracellular Adenosine activates specific receptors on vascular smooth muscle walls. This targeted pathway interference promotes the relaxation of the muscle tissue, leading to coronary vasodilation and an increase in localized blood flow.

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Dosage and Administration Information

How to Use Antistenocardin (Dipyridamole): Administration Guidelines

The administration of Antistenocardin (Dipyridamole) follows specific protocols that outline routes, dosing, and schedules for its approved uses. The medication is available in forms for both chronic oral therapy and specialized intravenous (IV) use.


Official Routes and Schedules

Antistenocardin is administered via two primary routes:

  • Oral (PO): Used for chronic, long-term prophylaxis against blood clot formation.
  • Intravenous (IV) Infusion: Reserved for diagnostic use in a clinical setting (pharmacological stress testing).
Indication Dosage Form and Route Standard Adult Dosing & Frequency Key Condition
Oral Prophylaxis (e.g., adjunct to warfarin) Oral Tablet 75 mg to 100 mg four times daily (QID) Take doses at regularly spaced intervals.
Oral Prophylaxis (extended-release form) Oral Prolonged-Release Capsule One capsule twice daily (BID) Swallow the capsule whole (do not crush or chew).
IV Diagnostic Use Injectable Solution 0.142 mg/kg/minute infused over four minutes Requires dilution prior to infusion.

Administration Conditions and Preparation

  • Tablets: May be taken with a full glass of water, often recommended at least one hour before or two hours after meals.
  • Prolonged-Release Capsules: May be taken with or without food.
  • IV Solution: The sterile solution must be diluted in an appropriate fluid (e.g., Sodium Chloride or Dextrose Injection) in at least a 1:2 ratio before it can be infused.

Population-Specific Notes

In older adults (geriatric), no dose adjustment is specified for the prolonged-release capsule form. However, the use of combination capsules (Dipyridamole/Aspirin) is not recommended in children or teenagers due to the aspirin component.

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Recent Clinical Evidence

Research Evidence / Overview of Studies

Compound Z in Monotherapy

Research evaluated whether compound Z was associated with a reduction in symptoms of condition X. Studies investigated the compound’s action, which researchers explored via pathway analysis.

  • Researchers reported on the timing of initial observations related to changes in symptoms.
  • The frequency of adverse events reported in the clinical trials was a key focus of the research.
  • Long-term research has tracked biological markers among subjects to investigate changes related to sustained exposure.

Combined Treatment Approaches

Research has investigated whether combining compound Z with drug A was associated with differences in patient outcomes. Studies examined how subjects responded to the two compounds taken together, with a focus on reported adverse events and treatment discontinuation.

  • Some studies included comparative arms examining compound Z versus drug B for the management of condition X. These studies reported on endpoints such as time to symptom resolution and overall patient well-being, without drawing conclusions on clinical suitability.
  • Research has also investigated whether compound Z was associated with a reduction in reports of pain and inflammation.

️ Study Context and Limitations

Studies investigated the effect of compound Z on the immune system. Researchers focused on specific markers and their fluctuation following administration of the compound.

  • Studies on compound Z and alcohol were limited and examined specific physiological markers.
  • Studies examining dosage included a range of concentrations up to the highest studied dosage.
  • Research has evaluated the potential for drug-drug interactions when compound Z is co-administered with other commonly used medications.
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Frequently Asked Questions (FAQ)

Common questions about Antistenocardin (FAQ)

Q: Is Antistenocardin the same as a traditional blood thinner?

No, the official classification for Antistenocardin is an antiplatelet agent. This means it works by stopping blood particles called platelets from clumping together. While sometimes loosely called a "blood thinner," this term often refers more specifically to anticoagulants, which work by slowing down the action of clotting proteins in the blood.

Q: What is the difference between an antiplatelet and an anticoagulant like Warfarin?

Official texts describe Antistenocardin as an antiplatelet agent, meaning it works by affecting platelets to make them less likely to stick together and form a clot. In contrast, anticoagulants (like Warfarin) work by interfering with specific proteins in the blood that are known as clotting factors. Both types of medication are used to prevent blood clots, but they act on different components of the clotting process.

Q: What specific heart conditions is Antistenocardin used to manage?

Official documents state that Antistenocardin is used for the prophylaxis (prevention) of blood clot formation, specifically in patients with prosthetic heart valve replacement. The medication is also used in a clinical setting for specialized diagnostic use, such as myocardial perfusion imaging (pharmacological stress testing).

Q: Why is Antistenocardin sometimes prescribed together with another drug like warfarin?

Official product information indicates that the drug is used as an adjunct (additional therapy) to an anticoagulant like warfarin. This combination is typically prescribed to prevent blood clots (thromboembolism) in patients who have prosthetic heart valves. The two medications have complementary effects that target different parts of the blood clotting process.

Q: What is the medical reason Antistenocardin is used after heart valve replacement?

The primary reason for using Antistenocardin after heart valve surgery is to prevent the formation of blood clots (thromboembolism). Artificial or prosthetic heart valves can increase the risk of clots forming, and this medication helps manage that risk.

Q: Why is Antistenocardin sometimes combined with aspirin in a single capsule?

Official regulatory approvals exist for a single capsule combining Antistenocardin (dipyridamole) and aspirin. This combination product is approved for use in the secondary prevention of stroke (preventing a second event). Studies support the combined action of both antiplatelet agents in reducing recurrence risk.

Q: How quickly does the antiplatelet effect of Antistenocardin start working?

According to pharmacokinetic data, the oral tablet reaches its peak concentration in the bloodstream within approximately 45 minutes to 2 hours. This rapid absorption indicates that the antiplatelet action begins relatively quickly after administration.

Q: Does the headache side effect from Antistenocardin usually go away over time?

Headache is noted in official patient information as a very common side effect. These common side effects generally tend to be mild and are often reported more frequently during the initial period of treatment, sometimes lessening over time.

Q: Is it normal to feel dizzy or lightheaded when starting Antistenocardin?

Yes, regulatory documents list dizziness and lightheadedness as frequently reported side effects. It is common for these effects to occur when first starting the medication, and regulatory information notes that these effects may become milder as use continues.

Q: Is flushing (a feeling of warmth or redness) a common side effect of Antistenocardin?

Yes, flushing is listed in official adverse reaction data as a commonly reported side effect. This is described as a reddening of the face or neck often accompanied by a warm sensation.

Q: Can Antistenocardin cause issues with the digestive system, like diarrhea or nausea?

Yes, official documentation lists several digestive system issues as commonly reported side effects. These include nausea, vomiting, diarrhea, and abdominal discomfort.

Q: What are the signs of a serious or severe side effect from Antistenocardin?

Signs of a severe reaction that may require immediate medical attention include chest pain and signs of serious allergic reactions, such as difficulty breathing or swelling of the face and throat. Patients are advised to be aware of signs of excessive or unusual bleeding, such as uncontrolled bleeding or severe bruising.

Q: Can Antistenocardin cause low blood pressure (hypotension)?

Yes, official safety information lists hypotension (low blood pressure) as a reported adverse reaction. This effect is seen more commonly when the medication is administered intravenously in a clinical setting.

Q: Can Antistenocardin affect my ability to safely drive or operate heavy machinery?

Official warnings note that the ability to drive or operate heavy machinery may be impaired if side effects such as dizziness, fainting, or visual changes are experienced.

Q: Is there a potential for vision changes as a side effect?

Yes, official adverse reaction data reports that uncommon side effects can include unspecified vision abnormalities.

Q: Are there any herbal or vitamin supplements that should be avoided with Antistenocardin?

Official guidance warns about the co-administration of certain herbal remedies and supplements that may affect blood clotting, such as ginkgo biloba, due to the potential for increased bleeding risk.

Q: Does Antistenocardin interact with any medications used for acid reflux or indigestion?

Yes, official warnings indicate that some medications used for acid reflux or indigestion, such as omeprazole, may reduce the absorption and effect of the drug. Regulatory advice notes that some of these medications may need to be administered at a time separate from the Antistenocardin tablet or liquid form.

Q: Can Antistenocardin be used by patients who have had stomach ulcers?

Official warnings indicate that this antiplatelet agent may potentially cause bleeding in the stomach or intestines. Regulatory warnings note that patients with a history of gastrointestinal bleeding or ulcers should be aware of the increased risk associated with the medication.

Q: Are there special warnings for people with myasthenia gravis taking Antistenocardin?

Yes, regulatory warnings advise caution for patients with myasthenia gravis. The medication has the potential to antagonize the effects of certain treatments for myasthenia gravis (cholinesterase inhibitors).

Q: Can a patient with liver impairment use Antistenocardin?

Official information indicates the medication is primarily metabolized in the liver. Regulatory-aligned sources note that patients with severe hepatic (liver) impairment should be aware of the medication's primary metabolism pathway in the liver.

Q: What is the official guidance on using Antistenocardin during pregnancy or breastfeeding?

During pregnancy, official guidance states that little information is available, and use is generally considered when the potential benefit outweighs the known risk. During breastfeeding, caution is noted due to excretion into human milk.

Q: Is Antistenocardin used to prevent a first stroke or only a second one?

Official guidelines primarily recommend the medication (often in combination with aspirin) for the secondary prevention of ischemic stroke or transient ischemic attack (TIA). This means its primary use in this context is for patients who have already experienced one of these events.

Q: What does the available research say about the long-term use of Antistenocardin?

Official patient information from regulatory-aligned sources notes that the medication is generally tolerated well during long-term use. It is indicated that the drug works best when taken consistently over long periods for prophylaxis.

Q: Is there a generic version of Antistenocardin available?

Yes, the active ingredient, Dipyridamole, is widely available as a generic drug. Generic versions are available in various approved oral forms and strengths.

Q: What happens in the body if a dose of Antistenocardin is missed?

Official patient advice outlines specific protocols for managing a missed dose, typically advising to take it soon as remembered unless it is near the next scheduled time.

Q: What are the reported effects of stopping Antistenocardin suddenly?

Official sources caution against abrupt cessation of this medication. Suddenly stopping the drug can cause the blood's clotting action to revert to its previous, higher-risk rate, potentially increasing the chance of serious cardiovascular events.

Q: How long does the drug remain in the body after the last dose?

Pharmacokinetic data shows that the drug is eliminated from the body in phases. The terminal elimination half-life (the time it takes for half the drug to be eliminated) is generally reported to be around 10 to 12 hours.

Q: Can Antistenocardin cause problems with the heart rate or rhythm?

Yes, official adverse reaction reports include various changes in heart rate or rhythm, such as tachycardia (fast heart rate) or arrhythmia (irregular rhythm). These effects are primarily reported when the drug is used intravenously in a clinical setting.

Q: What are the recommended storage conditions for Antistenocardin tablets?

Regulatory information advises that the oral dosage forms should be stored at a controlled room temperature. The medication should be protected from excessive heat and moisture and should be kept out of direct light to maintain its stability.

Q: What is the proper way to dispose of unused or expired Antistenocardin?

General federal guidance recommends following proper drug disposal procedures for unused or expired medication. This often involves taking the medication to an authorized drug take-back program or following specific local government disposal recommendations.

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How should Antistenocardin be stored and disposed of?

Storage and Disposal Requirements

The storage and disposal of Antistenocardin (Dipyridamole) must adhere strictly to the conditions specified in the official regulatory labeling to ensure product stability and safety.

Storage Conditions

Antistenocardin is required to be stored at controlled room temperature, specifically between 20 C and 25 C (68 F and 77 F). The medication must be kept in a closed container and stored away from heat, moisture, and direct light.

It is an explicit requirement to keep Antistenocardin from freezing.

Handling and Disposal

For safety, the medicine must be kept out of the reach of children.

Individuals should not keep outdated medicine or medicine no longer needed. Disposal must follow the guidance provided by a healthcare professional or a local waste disposal company.

Attention! Always consult to a doctor or pharmacist before using pills or medicines.

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