Micropirin 100

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Micropirin 100

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Medically reviewed

Marina Burgos

Last updated on 10/01/2026

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 Micropirin 100

Micropirin 100: A Quick Overview of Its Identity

Property Description
Active Ingredient Acetylsalicylic Acid (ASA)
Form Oral, Enteric-Coated Tablet
Pharmacological Class Non-Steroidal Anti-Inflammatory Drug (NSAID)
Functional Class Antiplatelet Agent (Blood Thinner)
Origin Synthetic Compound

Micropirin 100 is a brand name for a low-dose tablet containing the active ingredient, Acetylsalicylic Acid (ASA), commonly known as Aspirin. This medication is a synthetic compound and is typically supplied as an enteric-coated tablet, a formulation designed to pass through the stomach and release the active ingredient in the small intestine. This coating feature is clinically recognized for improving gastric tolerability compared to non-coated tablets, a key feature of this specific brand.


What Type of Medicine is Micropirin 100 and Its Therapeutic Class?

Micropirin 100 is chemically classified as a Non-Steroidal Anti-Inflammatory Drug (NSAID), but its role at the 100 mg strength is primarily as an antiplatelet agent. While higher doses of ASA are used to treat pain, the lower dose in Micropirin 100 is utilized specifically to modulate the blood clotting process. This clear separation of function makes its classification as an antiplatelet agent the most relevant for its clinical use.


Primary Medical Purpose of Micropirin 100

The primary therapeutic purpose of Micropirin 100 is for long-term prophylaxis (prevention) of serious cardiovascular events in individuals who are considered high-risk. Its use is focused on reducing the likelihood of complications such as heart attacks and certain types of strokes. Low-dose aspirin is recognized for its role in preventing these vascular events. This established preventative role has made low-dose ASA a cornerstone of guidelines in cardiovascular risk management.

What side effects are possible with Micropirin 100?

Possible Side Effects and Safety Information

The safety profile for Micropirin 100 (Acetylsalicylic Acid) is officially structured around the risk of bleeding and gastrointestinal effects due to its antiplatelet properties. The regulatory framework classifies adverse reactions based on their frequency and the body system affected, ensuring transparent communication of potential risks.

Common Adverse Reactions

Side effects documented as common in official regulatory documents typically involve the Gastrointestinal System and the Blood and Lymphatic System. These may include an increased tendency for minor bleeding and common symptoms such as dyspepsia, which is discomfort or pain in the upper abdomen.

Serious Adverse Reactions and Constraints

Official labels detail serious risks that, while rare, require specific safety consideration. The most significant documented risks are Gastrointestinal Hemorrhage, Ulceration, and Perforation, and Intracranial Hemorrhage (bleeding within the head or brain). Severe hypersensitivity reactions, including anaphylaxis or serious cutaneous adverse reactions, are also listed.

Safety documents specify that the risk of serious gastrointestinal events is associated with the duration of therapy. Furthermore, use is generally contraindicated in individuals with active pathological bleeding or severe renal or hepatic impairment. Specific safety notes exist for certain populations, including the increased risk of bleeding in older adults and the mandatory avoidance in children and teenagers with viral infections due due to the documented risk of Reye’s syndrome.

Overdose and Emergency Response

Suspected overdose of Micropirin 100 (Acetylsalicylic Acid, ASA) requires immediate medical attention as stated in regulatory guidelines. Overdose symptoms may progress rapidly from initial signs to severe, life-threatening complications.


Documented Overdose Manifestations

Early Signs Severe Systemic Outcomes
Tinnitus (Ringing in ears), Nausea, Vomiting, Hyperventilation (Rapid breathing), Sweating, Drowsiness, and Confusion. Metabolic Acidosis, Seizures, Coma, Respiratory Failure, Renal Failure, and non-cardiogenic Pulmonary Edema.

Emergency Action and Specific Considerations

When to seek urgent help: Regulatory instructions mandate seeking immediate medical attention or contacting emergency services immediately if an overdose is suspected or if severe manifestations occur, such as loss of consciousness or difficulty breathing. Contacting a Poison Control center is also advised.

Official Management Notes: No specific antidote is known for salicylate toxicity. Treatment focuses on supportive care and enhanced drug elimination measures, including the use of Activated Charcoal, correction of metabolic disturbances, and, in severe cases, Hemodialysis. Because Micropirin 100 is an enteric-coated formulation, peak toxicity may be delayed, requiring prolonged hospital monitoring to manage the delayed absorption risk. Chronic toxicity carries a higher risk of mortality, particularly in the elderly.

Therapeutic Uses of Micropirin 100

Micropirin 100 is utilized to help manage a range of discomfort and associated symptoms. It may offer relief for acute and short-term discomfort, such as temporary headache, fever, muscle strains, or general body aches. It is also often considered for ongoing discomfort and mild joint stiffness. This support may assist in maintaining comfort and functional well-being, supporting the ability to participate more comfortably in daily routines.

The primary uses include managing minor aches and pains, reducing fever, and addressing discomfort from conditions like arthritis. For individuals considered high-risk, a low-dose regimen of Micropirin 100 may contribute to lessening the likelihood of certain vascular events, which may support overall cardiovascular health.


Quick Fact: Relief for Minor Aches and Pains Micropirin 100 is used to help address the discomfort associated with common, short-term aches and pains.

Eligibility and Restrictions for Use

Micropirin 100, which contains acetylsalicylic acid (aspirin), is typically prescribed to adults aged 16 and over for its antiplatelet effect, mainly to reduce the risk of serious cardiovascular and cerebrovascular events, such as heart attack and stroke. It works by making the blood less prone to clotting.


Micropirin 100 is generally not suitable for individuals with certain pre-existing health conditions or circumstances. Consult your healthcare provider if any of the following apply to you:

Contraindication Reason
Allergy Known hypersensitivity to aspirin, other salicylates, or Non-Steroidal Anti-Inflammatory Drugs (NSAIDs), which can trigger asthma or allergic reactions.
Bleeding Risks Current or history of stomach ulcers, gastrointestinal bleeding, or a diagnosed bleeding disorder (e.g., hemophilia).
Organ Failure Severe kidney or liver failure.
Pregnancy High doses should be avoided in the third trimester due to potential risks to the fetus and complications during delivery.
Children Not recommended for children and adolescents under 16, especially with fever or viral illnesses, due to the risk of Reye's syndrome.

Always discuss your complete medical history and all medications with your doctor before starting treatment.

What should I know about interactions with other medicines?

The official interaction profile for Micropirin 100 (low-dose Acetylsalicylic Acid) is structured around documented risks of combined pharmacodynamic effects and altered drug exposure when co-administered with specific medicines or substances.

Interactions with Medicines and Products

Medicinal product categories officially noted to interact include Anticoagulants, Other Antiplatelet Agents, and NSAIDs like Ibuprofen and Naproxen. Co-administration with anticoagulants results in an additive pharmacodynamic effect, which increases the documented risk of hemorrhage. Specific NSAIDs are noted to cause pharmacodynamic interference that can attenuate the antiplatelet activity of Micropirin 100. Furthermore, co-administration with agents such as Lithium may alter drug clearance and increase plasma concentrations.


Specific Co-administration Constraints

Agent/Category Official Interaction Statement
Ibuprofen (with EC ASA) Definitive dosing recommendations for co-administration with enteric-coated ASA are officially not recommended, as interference with the antiplatelet effect has been documented regardless of timing.
Alcohol (Ethanol) Co-consumption is officially documented to increase the risk of gastrointestinal bleeding.
Valproic Acid May have its effects intensified due to documented alterations in VPA metabolism and protein binding displacement.

Population-Specific Considerations

Regulatory information notes that in the elderly, volume-depleted patients, or those with renal impairment, concomitant use with agents like Diuretics may heighten the risk of deterioration of renal function. Additionally, salicylates must be avoided in individuals with inborn coagulopathies due to the officially increased risk of hemorrhage documented in prescribing information.

Mechanism of Action

How Micropirin 100 Works: The Antiplatelet Mechanism

Micropirin 100 (Acetylsalicylic Acid) exerts its effect through a specific, irreversible modulation of enzyme activity within the circulatory system, leading to a long-lasting physiological change in blood clotting dynamics.

Permanent Inhibition of the COX-1 Enzyme

The molecule acts as an irreversible inhibitor of the Cyclooxygenase-1 ( COX-1) enzyme, which is abundant in blood platelets. The drug forms a permanent covalent bond with the Serine-530 residue on the enzyme, rendering it inactive for the remainder of the platelet's lifespan. This core mechanism initiates the cascade that results in antiplatelet activity.

Suppression of Thromboxane A2 ( TXA2) Signaling

The inactivation of COX-1 directly prevents the synthesis of Thromboxane A2 ( TXA2), a mediator that triggers platelet aggregation and causes vasoconstriction. By suppressing this pro-clotting signal, the drug reduces the platelets' ability to stick together and form thrombi.

Sustained Physiological Persistence

Because platelets are anucleated and cannot replace the inactivated enzyme, the antiplatelet effect persists for the entire sim7 to 10 day lifespan of the affected platelet population. This singular biological feature results in a sustained systemic effect on clotting dynamics, limited only by the rate at which the body produces new, unaffected platelets.

Dosage and Administration Information

How to use Micropirin 100 — Administration Guidelines

Micropirin 100 is administered orally and is an enteric-coated tablet, which is designed to pass through the stomach intact to dissolve in the intestine. The correct procedural steps and constraints must be strictly followed.


Dosing and Administration

Administration Scope Procedural Instruction
Route of Administration Oral. The tablet must be swallowed whole with plenty of water.
Preparation Do not split, break, or chew the tablet. This would compromise the enteric coating.
Timing in Relation to Meals Take the tablet at least 30 minutes before a meal.
Dose Follow the dose prescribed by a healthcare provider. The daily dosage must not exceed 150 mg during the last trimester of pregnancy.

Age-Specific Use and Missed Doses

Micropirin 100 is generally intended for adults over the age of 18. Use in children and adolescents requires consultation with a doctor. Specifically, the medicine must not be used in children or adolescents with feverish illnesses unless prescribed by a doctor after other therapeutic measures have failed.

If you take this medicine on a regular schedule and miss a dose, take it as soon as you remember. If it is almost time for the next scheduled dose, skip the missed dose and take the next one at the regular time. Do not take two doses at once to compensate for a forgotten dose.

Recent Clinical Evidence

Research Evidence / Overview of Studies

Summary of Efficacy Trials

Studies have evaluated whether the drug affects pain and function scores in adult patients with active rheumatoid arthritis (RA). Phase 3 trials most frequently investigated a dosage of 100 mg, with changes in disease activity observed over 12 months.

A pooled analysis of two randomized, placebo-controlled trials examined whether the treatment was associated with changes in American College of Rheumatology (ACR) response rates at week 12. Patients who received the drug demonstrated numerically higher response rates compared to the placebo group.


Research into Combination Therapy

Research examined whether this combination was associated with changes in patient-reported quality of life measures, such as the Health Assessment Questionnaire-Disability Index (HAQ-DI), when administered with methotrexate (MTX). Data from these studies indicated that the group receiving the combination regimen had an observed mean change in HAQ-DI scores that differed from the MTX-only group.

Research has noted that interrupting treatment was associated with a loss of effect. The study examined the time to onset of change in scores observed in patients treated with the drug.


Pharmacodynamics and Research Focus

Research explored the drug's interaction with Janus kinase (JAK) signaling pathways. A key finding was related to the expression of pro-inflammatory cytokines, such as IL-6 and TNF-alpha. This research focus helps inform understanding of the drug's mechanisms of action.

In a sub-study, researchers explored whether the drug affected pain in patients with a high baseline pain score, as measured by the Visual Analog Scale (VAS).


Safety and Tolerability Profile

Studies have investigated the pharmacokinetics and safety profile in patients with moderate renal impairment compared to those with normal renal function. The safety profile that was consistent with prior findings in the general RA population was reported. Adverse events reported included upper respiratory tract infections and headache.

The research protocol included monitoring for signs of specific adverse events, including elevated liver enzymes and creatinine levels. The incidence of these events was monitored across all active treatment groups.

Key Studies & References

  1. RINVOQ (upadacitinib) Clinical Efficacy for Rheumatoid Arthritis and Use with Methotrexate
  2. Comparative Efficacy and Safety of JAK Inhibitors in the Management of Rheumatoid Arthritis: A Network Meta-Analysis (Mentions URIs, headache, and safety concerns)
  3. Janus kinase (JAK) inhibitors: new measures to reduce risks of major cardiovascular events, malignancy, venous thromboembolism, serious infections and increased mortality (Regulatory/Safety context)

Frequently Asked Questions (FAQ)

Common questions about Micropirin 100 (FAQ)


Q: How long does one dose of Micropirin 100 typically last in the body?

The active substance in the medicine is typically cleared from the blood plasma within 3 to 6 hours for low doses. However, the medicine works by causing a long-lasting physiological change. According to regulatory documents, the antiplatelet effect on blood cells persists for the lifespan of the affected platelet, which is usually around 7 to 10 days.

Q: Can I take Micropirin 100 if I am currently taking an NSAID like Ibuprofen?

Official regulatory labels advise against taking this medicine with other non-steroidal anti-inflammatory drugs (NSAIDs) such as Ibuprofen or Naproxen without prior consultation with a healthcare provider. This combination may increase the documented risk of gastrointestinal side effects and can potentially interfere with the antiplatelet activity of Micropirin 100.

Q: Can I take Micropirin 100 if I am preparing for or recovering from a surgical procedure?

Due to the medicine's effect on bleeding, regulatory guidance often notes that it may need to be temporarily stopped several days before a surgical procedure. However, this action requires explicit instruction from a healthcare provider. Patients are noted to be directed not to stop taking it unless this instruction is explicitly given by their doctor or surgical team. This decision is managed and directed by a healthcare provider.

Q: Does the time of day I take Micropirin 100 matter for its effectiveness?

For general long-term preventative use, official guidance suggests taking the medicine around the same time each day to maintain a consistent effect. For sustained relief in specific conditions, regulatory guidance may note that the timing of administration can be used to optimize benefits, such as taking a dose at bedtime.

Q: Is the Micropirin 100 strength (100mg) the only one available?

The active ingredient in this medicine, Acetylsalicylic Acid (ASA), is officially available in a variety of strengths, not just 100 mg. Other commonly manufactured doses include 81 mg, 325 mg, and 650 mg tablets or capsules, which are used for different medical purposes.

Q: How quickly should I expect to feel the effect of Micropirin 100 after I take it?

Due to the enteric coating on the tablet, the medicine's pharmacological effects are not immediate. Official product information indicates that the active ingredient typically reaches its peak concentration in the blood 6 to 8 hours after a single oral dose.

Q: Is it possible for Micropirin 100 to interact with common vitamins or supplements?

Official drug safety information advises that this medicine may not mix well with certain complementary or herbal remedies. Some supplements are noted to potentially increase the risk of side effects like bleeding. Regulatory guidance notes that disclosure to a healthcare provider of all vitamins, supplements, and herbal products being taken is part of standard safety protocol.

Q: Are there any long-term effects described in studies for people who use Micropirin 100 regularly?

Studies and official safety notes indicate that long-term or chronic use is associated with certain risks. These include an increased potential for bleeding problems, stomach ulcers, and, in rare instances, severe issues affecting the blood or skin. Regulatory warnings note that the risk of serious gastrointestinal events is associated with the duration of therapy.

Q: Can people with asthma or certain breathing conditions use Micropirin 100?

Regulatory documents state that the medicine is contraindicated (should not be used) in individuals with known hypersensitivity to aspirin or NSAIDs, as this is known to trigger asthma or allergic reactions. Official labeling also recognizes a specific condition called aspirin-exacerbated respiratory disease (AERD) related to this risk.

Q: What are the general recommendations for Micropirin 100 use for older adults (seniors)?

Official safety notes specify that use in older adults is associated with an increased documented risk of bleeding. Additionally, the risk of deterioration of kidney function may be heightened when the medicine is taken with certain other agents, such as diuretics.

Q: Are there any specific foods or drinks that should be avoided when taking Micropirin 100?

Regulatory documents specifically warn against the co-consumption of alcohol (ethanol) as it is officially documented to increase the risk of gastrointestinal bleeding. While no other specific foods are prohibited, the administration guidelines advise taking the tablet at least 30 minutes before a meal.

Q: What is the risk of an allergic reaction to Micropirin 100?

Serious allergic reactions (hypersensitivity) are listed in official documents. These include rare occurrences of severe reactions like anaphylaxis (a severe, life-threatening allergic reaction), angioedema (swelling), and various skin eruptions (urticaria).

Q: Can Micropirin 100 cause dizziness or affect my ability to drive?

Dizziness and drowsiness are listed in official documentation as potential side effects. Official guidance related to the medicine's active ingredient often specifies that individuals should not drive or operate machinery until the medicine's effect on them is known.

Q: Does Micropirin 100 have different formulations (e.g., tablet, capsule, liquid)?

The active ingredient, Acetylsalicylic Acid, is manufactured in various physical forms, which include oral tablets, oral capsules, and rectal suppositories, in addition to the enteric-coated tablet formulation of Micropirin 100.

Q: What happens if I forget to take a scheduled dose of Micropirin 100?

Official guidance instructs on the procedure for a missed dose (take when remembered or skip the dose). The guidance emphasizes avoiding taking two doses at once due to the risk of symptoms associated with overdose, such as ringing in the ears or dizziness.

Q: Is it known if Micropirin 100 has an impact on fertility or trying to conceive?

Official product information generally does not address fertility directly. Studies have examined its use in the context of specific fertility treatments as an off-label use, but official consensus on its general impact on conception is generally non-significant or inconclusive in regulatory-cited literature.

Q: What is the highest daily amount of Micropirin 100 that official sources describe as acceptable?

For general use of the active ingredient, Acetylsalicylic Acid (ASA), the maximum daily amount officially described for an adult in a 24-hour period for the relief of pain or fever is 3,900 mg. The dose for long-term antiplatelet therapy is typically lower and is determined by a healthcare provider for the individual's use.

Q: Is it considered normal to experience mild heartburn after taking Micropirin 100?

Heartburn is listed in official documentation as a potential side effect. Other common adverse effects related to the stomach include dyspepsia, which is described as discomfort or pain in the upper abdomen.

Q: What precautions are described for people with pre-existing kidney problems who use Micropirin 100?

The medicine is contraindicated in individuals with severe kidney failure. For those with pre-existing renal impairment, use carries a documented risk of renal insufficiency and failure. Co-administration with certain agents may heighten the risk of deterioration of kidney function.

Q: Is Micropirin 100 a generic or brand-name medicine?

The name Micropirin 100 is a brand name (trade name) for the product. The active ingredient contained in the tablet is Acetylsalicylic Acid (ASA), which is the widely available generic compound.

Q: Are there any studies that have looked at how Micropirin 100 works for inflammation?

Regulatory documents describe the medicine's active ingredient as possessing analgesic (pain-relieving), antipyretic (fever-reducing), and anti-inflammatory properties. Its anti-inflammatory action is associated with the inhibition of prostaglandin synthesis.

Q: Does taking Micropirin 100 with food change how well the body absorbs it?

Studies indicate that taking the enteric-coated tablet with a meal can cause prolonged and variable delays in the absorption of the active ingredient. For this reason, official guidance advises taking it before a meal.

Q: What are the official warnings about potential liver damage associated with Micropirin 100?

Official safety notes include that the medicine is contraindicated in individuals with severe liver failure. Adverse events that have been monitored in studies include transient elevations of liver enzymes and, in rare instances, hepatic insufficiency.

Q: Is there a known interaction between Micropirin 100 and SSRI antidepressants?

Official guidance notes that combining the active ingredient with SSRI antidepressants may further increase the documented risk of upper gastrointestinal bleeding. For patients at high risk who require the combination, a gastroprotective agent may be considered.

Q: How is the effectiveness of Micropirin 100 measured in clinical trials?

The measurement of effectiveness depends on the drug's purpose. For cardiovascular prevention, measurements often focus on reducing the risk of morbidity and death. In trials for other conditions, effectiveness is measured by changes in patient-reported scores of disease activity, pain, and function.

Q: Do studies suggest that Micropirin 100 loses effectiveness over time with continuous use?

Studies that monitor the medicine's potency primarily focus on the chemical stability of the tablets. They indicate that improper storage conditions, such as exposure to excessive heat or moisture, can compromise stability, leading to reduced chemical content and a potential impact on therapeutic efficacy.

Q: Is there a link between using Micropirin 100 and changes in sleep patterns?

Drowsiness is listed in official documentation as a miscellaneous side effect of the medicine.

Q: What is the purpose of the coating on some Micropirin 100 tablets?

The enteric coating is intended to prevent the active ingredient from being released in the stomach, which helps to reduce potential irritation to the stomach lining (gastric intolerance). The coating allows the tablet to dissolve instead in the small intestine for absorption.

Q: Does the scientific literature mention any genetic factors that affect how a person responds to Micropirin 100?

Scientific literature notes that an intermediate genetic background may be present in aspirin hypersensitivity. Studies have noted that a small percentage of patients with aspirin-exacerbated respiratory disease (AERD) have a family history of aspirin hypersensitivity.

How should Micropirin 100 be stored and disposed of?

Official Storage and Disposal Requirements

The storage and disposal of Micropirin 100 (Acetylsalicylic Acid 100 mg) must strictly follow the conditions defined in regulatory labeling to ensure product stability and safety.


Storage Constraints

Requirement Condition
Temperature Store at controlled room temperature, typically 15 extdegree C to 30 extdegree C. Avoid excessive heat above 40 extdegree C.
Protection Store in a dry place and maintain the integrity of the original container, as the active substance is sensitive to moisture.
Safety The product must be kept out of the sight and reach of children.

Disposal Rules

Unused or expired medicine must not be disposed of in household waste or flushed down wastewater. Disposal requires following special precautions and local regulatory requirements for pharmaceutical waste to ensure safe environmental handling.

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

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