Lopirel Plus

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Lopirel Plus

Method of action: Antithrombotic

Treatment option:

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.

Overview of Lopirel Plus

Property Description
Active Ingredients Acetylsalicylic Acid (ASA), Clopidogrel
Form Oral Tablet
Pharmacological Class Platelet Aggregation Inhibitor, Antithrombotic Agent
Common Use Maintaining blood flow / Preventing blood clot formation
Origin Synthetic

Lopirel Plus is a prescription fixed-dose combination product containing two different antiplatelet agents designed to prevent the formation of blood clots. This synthetic, oral preparation is categorized as an Antithrombotic Agent. This formulation is a standard approach in dual antiplatelet therapy. The combination simplifies long-term treatment adherence compared to taking the two medicines separately, providing consistent antiplatelet coverage for high-risk adults.

Composition and Physical Form

The medicine is composed of two distinct active ingredients: Acetylsalicylic Acid (ASA), a salicylate, and Clopidogrel, a thienopyridine derivative. These combination products function by preventing blood components called platelets from sticking together. Combining these two agents is a standard approach for suppressing platelet activity.

The unique composition combines a non-selective COX-1 inhibitor (ASA) with a selective P2Y12 inhibitor (Clopidogrel). This ensures that two primary mechanisms responsible for platelet aggregation are addressed simultaneously within one oral tablet.

What is the General Purpose of Dual Antiplatelet Therapy?

The core purpose of this antiplatelet combination therapy is to suppress the ability of blood platelets to activate and form obstructive blood clots within the arteries. The synergy created by Acetylsalicylic Acid and Clopidogrel is intended for protection against coagulation. A typical use scenario involves stabilizing patients who require sustained protection against the processes that could lead to vascular occlusion. By inhibiting platelet function, Lopirel Plus serves to maintain smooth blood flow throughout the circulatory system.

Regulatory References

  1. Antithrombotic Agents - LiverTox - NCBI Bookshelf
  2. DuoPlavin | European Medicines Agency (EMA)

What side effects are possible with Lopirel Plus?

Possible Side Effects and Safety Information

The officially documented safety profile for the clopidogrel and acetylsalicylic acid (ASA) combination primarily centers on its effect on the blood and circulatory system. The most frequent safety characteristic is haemorrhage (bleeding), which is classified as Very Common in regulatory documents and includes events ranging from minor bruising to significant internal bleeding .

Frequency and System-Organ Classes

The adverse reactions are grouped by System-Organ Class (SOC) and frequency, based on official regulatory standards:

  • Blood and Lymphatic System Disorders: Characterized by haemorrhage, which can be Very Common.
  • Gastrointestinal Disorders: Common effects include gastrointestinal haemorrhage, abdominal pain, dyspepsia, and diarrhea. Uncommon effects include peptic ulceration, gastritis, nausea, and vomiting.
  • Nervous System Disorders: Common effects include headache and dizziness. Intracranial haemorrhage is Uncommon.

Serious Adverse Reactions and Safety Constraints

Serious, although rare, adverse reactions are officially documented. These include Thrombotic Thrombocytopenic Purpura (TTP) and serious, sometimes fatal, Intracranial Haemorrhage. TTP has been reported to occur sometimes after a short exposure of less than two weeks.

Safety constraints formalized in regulatory labeling define patient conditions where use is contraindicated. The medicine must not be used in patients with active pathological bleeding (such as peptic ulcer or intracranial haemorrhage) or in those with severe hepatic or severe renal impairment. Due to the risk of Reye's syndrome associated with ASA, this combination is also not generally recommended for children and adolescents under 18 years.

Overdose and Emergency Response

Overdose and When to Seek Help

The overdose profile for this product is defined by the toxicological risks of its two components: systemic salicylate toxicity (from Acetylsalicylic Acid) and the severe risk of hemorrhagic events (from the dual antiplatelet effect).

Immediate Required Actions: Any suspected overdose requires immediately contacting emergency services or a Poison Control Center. This immediate action is mandated due to the potential for rapid progression to severe, life-threatening complications, including profound metabolic acidosis, respiratory failure, and major hemorrhage.

Documented Overdose Presentations: Officially documented signs of overdose often include neurological and systemic changes such as tinnitus (ringing in the ears), impaired hearing, confusion, excessive hyperventilation (tachypnea), vomiting, and fever. More severe toxicity can lead to seizures, cerebral edema, and coma.

Management and Monitoring: Management is defined as being symptomatic and supportive. Regulatory documents confirm that no specific chemical antidote is known for salicylate toxicity. Severe cases require hospital admission and intensive care, where interventions such as gastric lavage and administration of activated charcoal may be required. Enhanced elimination, like Hemodialysis, is listed for severe toxicity or organ failure. Monitoring requires serial measurement of blood salicylate levels, continuous observation of acid-base status, and blood cell counts to assess bleeding risk. Chronic toxicity carries an increased risk of severity, particularly in older adults.

Therapeutic Uses of Lopirel Plus

What Lopirel Plus Treats: Main Uses and Benefits

Lopirel Plus is relevant as a foundational therapy for patients facing the high risk associated with established vascular disease. It generally plays a role in secondary prevention and may assist in supportive management against the risk of severe, disruptive complications. The combination is applied in clinical settings that involve acute or unstable symptom patterns, consistent with its therapeutic classification.


Therapeutic Contexts and Benefits

The primary therapeutic use of this combination is commonly applied across major clinical scenarios, including managing risk after Acute Coronary Syndrome (ACS), providing long-term supportive therapy following stent placement (PCI), and assisting with Ischemic Stroke recurrence risk following a TIA or minor stroke. This dual antiplatelet approach is intended to help manage the overall risk of a recurrent major event. It assists with maintaining functional stability and minimizing the impact of symptoms that interfere with daily functioning.

Quick Fact: Relevant for Preventing Thrombotic Events

The therapy is intended to play a role in managing symptoms that interfere with daily functioning, applied across domains where additional symptomatic support is needed.

Eligibility and Restrictions for Use

Who Can and Cannot Use Lopirel Plus?

Regulatory agencies define the eligible and non-eligible patient populations for Lopirel Plus (Acetylsalicylic Acid and Clopidogrel) based on clinical data and patient risk factors.

Eligible and Restricted Populations

Population Group Regulatory Status
Adult Patients Allowed; approved population for secondary prevention of atherothrombotic events.
Children & Adolescents (Under 18) Not Recommended; safety and efficacy have not been established.
Mild/Moderate Renal Impairment Use with Caution; therapeutic experience is limited.
Moderate Hepatic Disease Use with Caution; therapeutic experience is limited.

Absolute Contraindications

The medicine is contraindicated and must not be used in specific groups due to unacceptable risk, as documented in official labeling:

  • Patients with Active Pathological Bleeding, such as intracranial haemorrhage or peptic ulcer.
  • Patients with Severe Hepatic Impairment or Severe Renal Impairment (Creatinine clearance less than 30 mL/min).
  • Patients in the Third Trimester of Pregnancy.
  • Individuals with known Hypersensitivity to the active substances (ASA, Clopidogrel) or the syndrome of asthma, rhinitis, and nasal polyps.

Pregnancy and Lactation

  • Third Trimester: Contraindicated.
  • Breastfeeding: Not Recommended; discontinuation is advised.

What should I know about interactions with other medicines?

Interactions with other medicines and products

This section outlines the officially documented interaction patterns for the fixed-dose combination product containing Clopidogrel and Acetylsalicylic Acid (ASA), based strictly on government regulatory documents.

Interaction Classification Interacting Agents / Classes Officially Documented Effect
Contraindicated Combinations Omeprazole and Esomeprazole (PPIs), Oral Anticoagulants (e.g., Warfarin) PPIs reduce the antiplatelet effect of clopidogrel via a pharmacokinetic mechanism. Oral anticoagulants are restricted due to significant pharmacodynamic reinforcement of bleeding risk.
High-Risk Combinations Non-Steroidal Anti-Inflammatory Drugs (NSAIDs), SSRIs/SNRIs, Heparin Additive antiplatelet effects and heightened, officially documented risk of gastrointestinal or other types of haemorrhage.
Metabolic / Exposure Strong CYP2C19 inhibitors (e.g., Fluvoxamine, Ciprofloxacin), Methotrexate Inhibitors diminish clopidogrel's active metabolite, resulting in reduced antiplatelet activity. ASA reduces the renal clearance of high-dose Methotrexate, leading to increased plasma concentration of that medicine.

Official Interaction Statements:

  • The regulatory profile dictates a formal contraindication for co-administration with Omeprazole and Esomeprazole.
  • Co-administration with other oral anticoagulants is also explicitly restricted due to an officially acknowledged high risk of bleeding.
  • The official label documents an increased risk of gastrointestinal bleeding when the medicine is co-ingested with alcohol.
  • Regulatory documents note that patients with severe hepatic impairment may have altered clopidogrel metabolism and an increased risk of haemorrhage.

Mechanism of Action

How Lopirel Plus Works

Lopirel Plus is a combination medication that modulates the body's clotting response by acting on two distinct signaling pathways within platelets. This dual approach results in the modification of the final stages of platelet aggregation.

Blocking the P2Y12 Receptor Pathway

One component of the medication works by targeting the P2Y12 receptor on the platelet surface. Irreversible binding to this receptor suppresses the ADP-driven signaling cascade necessary for platelets to fully activate and aggregate. This molecular inhibition reduces the potential for downstream platelet-to-platelet adhesion and subsequent thrombus formation.


Inhibiting the TXA2 Synthesis Cascade

The second component acts by irreversibly blocking the Cyclooxygenase-1 (COX-1) enzyme in platelets. This enzymatic inhibition suppresses the production of Thromboxane A2 ( TXA2), a key chemical mediator that promotes aggregation and vessel constriction. This mechanism modifies the eicosanoid-mediated pathway, suppressing the generation of the pro-thrombotic mediator TXA2.


Dual-Mechanism Regulation of Platelet Activity

By simultaneously modulating these two critical, non-overlapping pathways, the medication exerts a targeted action on two distinct regulatory pathways. This combined action initiates or suppresses signaling sequences, resulting in an overall suppression in the platelet's ability to form stable aggregates, which modifies the physiological process of platelet aggregation.

Dosage and Administration Information

The fixed-dose combination tablet, Lopirel Plus, is for oral administration and is taken once daily to maintain consistent antiplatelet coverage. The standard maintenance dose is one tablet of the available strengths, such as 75 mg Clopidogrel with either 75 mg or 100 mg of Acetylsalicylic Acid (ASA). The tablet is swallowed with water and can be administered with or without food.

This product is standardized as a continuation therapy and replaces the individual clopidogrel and ASA tablets previously taken separately. The total course duration is specified for certain conditions; for instance, continuation may be supported for up to 12 months following certain types of acute coronary syndrome, or a minimum of four weeks for ST-Elevation Myocardial Infarction.

Dosing and Procedural Constraints

Condition Administration Instruction
Dose Missed (<12 hours) Take the missed dose immediately, then resume the regular scheduled time.
Dose Missed (>12 hours) Skip the missed dose and take the next dose at the regular scheduled time; do not double the dose.
Severe Organ Impairment The fixed-dose combination is not used in patients with severe hepatic or renal impairment.
Elective Surgery The medicine is typically discontinued 7 days prior to any elective surgery where the antiplatelet effect is undesired.

The following details describe the required constancy of the once daily dosing schedule, the handling of missed timing, and the specific procedural steps associated with appropriate use, particularly when surgical intervention is planned. These constraints also define use limitations based on severe organ function status.

Recent Clinical Evidence

Research evidence / Overview of Studies for Lopirel Plus


Evidence for Use in Acute Coronary Syndrome and Post-Stent Care

Research has explored the antiplatelet combination in adults with conditions associated with Acute Coronary Syndrome (ACS), such as unstable angina or non-ST-segment elevation myocardial infarction (NSTEMI). Large-scale randomized controlled trials (RCTs) are widely used study designs in examining antiplatelet strategies. They monitored patient groups over intermediate-term treatment periods (typically 9 to 12 months) and tracked a composite of major outcomes, including Cardiovascular Death, nonfatal Myocardial Infarction, and Stroke. Researchers also monitored events related to the placement of a stent, such as stent thrombosis, and the need for urgent Revascularization procedures.

The findings describe patterns observed in the studies related to the measurement of these composite vascular events within the population receiving the dual therapy. However, studies also report how major and minor bleeding events evolved in the observed populations, indicating an increased rate of bleeding was associated with the dual therapy compared to aspirin alone.

Evidence for Use After Minor Ischemic Stroke or High-Risk TIA

The combination was studied for use in patients who recently experienced a minor ischemic stroke or a high-risk Transient Ischemic Attack (TIA). The evidence comes primarily from short-term Randomized Controlled Trials (RCTs) that typically enrolled patients within 24 hours of their event onset.

Studies monitored the rate of recurrent stroke (both ischemic and hemorrhagic) and a composite of other Major Ischemic Events during the short follow-up periods, usually up to 90 days. Research describes patterns related to the frequency of recurrent ischemic events in the treated populations during these defined time intervals.

What is Still Uncertain About the Research for Lopirel Plus

The overall evidence landscape contributes to understanding symptom patterns, but it also highlights areas where research is ongoing and where data remain insufficient. Follow-up durations were limited in certain indications, meaning the assessment of the dual antiplatelet combination for treatment periods longer than those originally studied is not fully established. Evidence quality varies across studies when assessing the optimal management strategy for long-term secondary prevention, leading to mixed findings and continued uncertainty about the best duration of therapy. Research provides context but not individual predictions; studies help show what has been observed so far, but the evidence does not determine whether an individual will respond similarly.

Key Studies & References

  1. CLOPIDOGREL - DailyMed (Authoritative Drug Label)

Frequently Asked Questions (FAQ)

Common questions about Lopirel Plus (FAQ)

Q: How quickly should I expect Lopirel Plus to start working?

According to official product information, the initial effect of inhibiting platelet activity can be observed within two hours after a single dose. To achieve the steady and consistent antiplatelet effect for which the medicine is intended, it typically takes between three and seven days of continued daily dosing.

Q: Can Lopirel Plus affect my sleep?

Official regulatory documents list dizziness and drowsiness as possible adverse reactions, though they are usually reported as uncommon. If these effects occur, they could potentially interfere with your ability to sleep or affect your general alertness.

Q: Are there any long-term side effects associated with Lopirel Plus?

Regulatory documents report adverse reactions based on clinical studies, which often cover intermediate-term use. The most frequently reported effects include bleeding, gastrointestinal issues, headache, and dizziness. These reports provide context on the safety profile that has been observed in patient populations during the course of the clinical studies.

Q: Does Lopirel Plus require regular blood tests?

The official label advises caution and monitoring for patients who may be at risk of increased bleeding. Therefore, the need for blood-related checks or specific monitoring is determined on an individual basis, as part of assessing overall bleeding risk.

Q: Is there a generic version of Lopirel Plus available?

Lopirel Plus is a specific brand name for the fixed-dose combination product. However, the two active ingredients, clopidogrel and acetylsalicylic acid (ASA), are available in generic fixed-dose combinations from various approved manufacturers, as noted in official drug registries.

Q: Why is Lopirel Plus often prescribed after a heart procedure?

The medicine is indicated to help reduce the risk of major cardiovascular events, such as a heart attack (Myocardial Infarction) or stroke. It is commonly prescribed to patients with Acute Coronary Syndrome (ACS), which includes those who have recently undergone procedures like stent placement, to prevent future blood clot formation.

Q: Are there any known interactions between Lopirel Plus and antacids?

Official drug labels specifically contraindicate the use of certain acid-reducing medicines called Proton Pump Inhibitors (like omeprazole and esomeprazole) because they can reduce the medicine's antiplatelet effect. General antacids (that are not PPIs) are typically not included in the formal list of high-risk or contraindicated interactions.

Q: What research has been done on the long-term effectiveness of Lopirel Plus?

The overall body of evidence includes large-scale randomized controlled trials (RCTs) that have studied the combination therapy over intermediate-term treatment periods, generally ranging from nine to twelve months, particularly for conditions like Acute Coronary Syndrome. These studies help determine the medicine's effectiveness over these defined intervals.

Q: Is Lopirel Plus used for DVT (deep vein thrombosis)?

The approved uses for this medicine are generally limited to the secondary prevention of blood clots in patients with known atherothrombotic events, such as a previous heart attack or stroke. It is not indicated for the primary treatment of Deep Vein Thrombosis (DVT), which typically requires different types of anti-clotting medications.

Q: Will Lopirel Plus affect my ability to drive or operate machinery?

Official information advises that the medicine may cause common side effects like dizziness and headache, and occasionally drowsiness. If these effects are experienced, it is recognized that they have the potential to impair one's ability to drive or operate complex machinery.

Q: Is it normal for my stools to look different while on Lopirel Plus?

Since gastrointestinal bleeding (bleeding in the stomach or intestines) is a common side effect documented in regulatory materials, changes in stool appearance, such as them becoming dark or bloody, are documented possibilities that relate to this risk.

Q: Where can I find reliable patient information about Lopirel Plus?

Reliable and official patient information, including details about side effects and usage, is provided directly in the Patient Information Leaflet (PIL) that comes with your prescription. Additionally, you can find official information in government drug databases and public registers, such as those maintained by the FDA or the European Medicines Agency (EMA).

How should Lopirel Plus be stored and disposed of?

Official Storage and Disposal Requirements

The fixed-dose combination product containing Clopidogrel and Acetylsalicylic Acid requires adherence to specific regulatory conditions to maintain its stability and prevent accidental exposure.

Requirement Type Official Regulatory Statement
Storage Temperature Store at controlled room temperature, typically mathbf20 C to mathbf25 C (mathbf68 F to mathbf77 F).
Protection & Handling Keep the medicine in its original container and ensure the container is tightly closed. Protect from moisture and excessive heat.
Child Safety Keep out of the reach of children.
Disposal Dispose of unused or expired product according to local regulations. Do not flush the tablets down a toilet or pour them into a drain.

These mandated conditions define how the medicine must be protected from environmental factors and ensure it is handled safely before its final disposal via official channels.

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

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