Licostan

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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 Licostan

This section defines Licostan by its chemical identity, pharmacological classification, and general purpose, strictly adhering to factual accuracy and excluding specific clinical use details, dosages, or safety information.

Property Description
Active ingredient Mefenamic Acid (INN)
Form Oral capsules and tablets
Pharmacological class Nonsteroidal Anti-inflammatory Drug (NSAID)
Common use Relief of pain, inflammation, and fever
Origin Synthetic compound (fenamate derivative)

Licostan is a synthetic pharmaceutical preparation used to address symptoms of pain, inflammation, and elevated body temperature. The medicine's efficacy is derived from its sole active compound, Mefenamic Acid (INN), which classifies it within the Nonsteroidal Anti-inflammatory Drug (NSAID) category. It is primarily supplied for oral administration in solid dosage forms, such as capsules or tablets. The product is recognized within major formularies for its effectiveness as an analgesic and anti-inflammatory agent.


What Type of Medicine is Licostan and its Class?

Licostan is medically defined as an NSAID, a class of agents known for analgesic, anti-inflammatory, and antipyretic activities. The active substance, Mefenamic Acid, is a synthetic compound that belongs specifically to the anthranilic acid derivative group, often termed fenamates, which is a structural subclass of NSAIDs. This core identity defines its physiological actions and therapeutic applicability in managing conditions characterized by discomfort and inflammatory response. Unlike some other NSAIDs, Mefenamic Acid is often prescribed in typical use scenarios where both pain and inflammatory components are present, such as acute discomfort.


Composition, Form, and General Purpose

The composition of Licostan is based on Mefenamic Acid, which functions by inhibiting the synthesis of prostaglandins, the endogenous chemical mediators that intensify pain and promote swelling. This prostaglandin synthesis inhibition mechanism is the general principle behind its therapeutic utility, enabling the medicine to provide effective symptomatic relief. The Mefenamic Acid is formulated with various pharmaceutical excipients to create a stable oral solid form that facilitates consistent systemic absorption after ingestion. These drugs function primarily as cyclooxygenase (COX) inhibitors, preventing the formation of inflammatory mediators. This mechanism means the medicine is clinically recognized for its ability to help ease discomfort by interrupting the body's primary signaling pathway for inflammation and pain.

Regulatory References

  1. NIH LiverTox: Mefenamic Acid
  2. NIH: NSAID Mechanism of Action

What side effects are possible with Licostan?

Possible Side Effects and Safety Information

This section summarizes the adverse reactions and safety information for Licostan as documented by regulatory authorities. The information is organized by the severity and affected body systems to structure the medicine’s official risk profile.

Common and Clinically Significant Adverse Reactions

Official documents classify side effects by their frequency in clinical studies. Adverse reactions reported as Very Common or Common typically affect the following system-organ classes:

  • Gastrointestinal Disorders: Very common reports include mild-to-moderate effects such as nausea, abdominal discomfort, and diarrhea, particularly early in treatment.
  • Nervous System Disorders: Common effects noted are headache and dizziness.
  • General Disorders: Fatigue or influenza-like symptoms are often reported.

Serious and Rare Safety Considerations

The regulatory safety profile mandates attention to less frequent but more serious effects. Rare adverse reactions, which require clinical evaluation, may include severe hypersensitivity reactions (e.g., anaphylaxis) or significant blood disorders. Other serious reactions documented include elevated liver enzyme levels (hepatotoxicity) and renal function impairment.

Safety-Related Restrictions

Official labels describe circumstances where Licostan is contraindicated or requires particular caution. Use is restricted in patients with a known hypersensitivity to the active substance. Caution is specifically advised for patients with pre-existing or significantly impaired kidney or liver function, as these conditions may increase the risk of specific adverse effects. Regulatory notes also identify a potential for drug-drug interactions, which necessitates careful clinical monitoring.

Overdose and Emergency Response

Overdose and When to Seek Help

Overdose Manifestations and Severe Outcomes

Official regulatory documentation on Mefenamic Acid overdose defines specific clinical manifestations, often involving the central nervous system (CNS). Documented presentations include seizures, coma, confusion, and extreme drowsiness. Severe or life-threatening outcomes reported in regulatory profiles include acute renal failure and metabolic acidosis. Gastrointestinal signs such as severe stomach pain, vomiting, or evidence of bleeding (e.g., bloody or coffee-ground vomit or black stools) are also documented presentations. The official prescribing information notes that most fatal gastrointestinal events following overdose are reported in elderly or debilitated patients.


Required Emergency Actions and Management

The presence of serious symptoms triggers mandatory emergency action. Emergency services must be contacted immediately if the individual collapses, has a seizure, cannot be awakened, or shows signs of a cardiovascular event such as slurred speech, chest pain, or weakness. The poison control helpline should also be contacted. Management is primarily supportive; regulatory documents confirm that no specific antidote is known for Mefenamic Acid toxicity. Official guidance outlines supportive procedures, including gastric decontamination via lavage and the use of activated charcoal, with continuous monitoring of vital functions being required.

Therapeutic Uses of Licostan

What Licostan Treats: Main Uses and Benefits

Licostan is applied across domains where additional symptomatic support is needed and contributes to comfort during periods of heightened discomfort or functional strain. It is used to moderate distressing symptoms and supports multiple symptom-focused domains where short-term assistance is appropriate.


Symptom Management and Clinical Applications

This medication is commonly used to help with symptoms related to mild to moderate acute pain, inflammation, and fever. It is considered relevant in conditions characterized by periods of heightened symptoms, including the discomfort associated with primary dysmenorrhea (menstrual cramping), menorrhagia (heavy menstrual bleeding), and pain from chronic conditions like rheumatoid arthritis and osteoarthritis. Furthermore, it is applied in scenarios where additional management of discomfort is required, such as following dental extractions or during periods of general febrile illness.

The medication plays a role in managing symptoms that create noticeable physiological strain and supports patients during difficult episodes by easing distress. It helps address symptom clusters that may become intense or disruptive and interfere with daily comfort.


Quick Fact: Relief for Cyclical Discomfort and Inflammation


Therapeutic Benefit

By providing supportive relief, Licostan may help patients cope more steadily with symptom fluctuations, contributing to functional stability when symptoms interfere with routine activities. It is applicable within clinical settings that involve acute or disruptive symptom patterns, and contributes to comfort and supports general well-being during symptomatic phases.

Regulatory References

  1. Mefenamic Acid: MedlinePlus Drug Information

Eligibility and Restrictions for Use

Who Can and Cannot Use Licostan?

Official regulatory documentation defines precise eligibility rules for Licostan (Mefenamic Acid). The medicine is approved for adults and adolescents 14 years and older. It is not recommended for children under 14, as safety and efficacy have not been established for this age group in the solid oral form.

Licostan is contraindicated (must not be used) in several patient populations. These include individuals with severe hepatic, renal, or heart failure, or those with active gastrointestinal (GI) ulceration or chronic inflammation. Use is strictly prohibited for patients with a documented history of asthma, urticaria, or allergic reactions to aspirin or any other NSAID. Furthermore, the medicine is contraindicated for pain management following Coronary Artery Bypass Graft (CABG) surgery.

For pregnant women, use is contraindicated at or after 20 weeks of gestation. The medicine is also not recommended for nursing mothers or women who are attempting to conceive. Special caution is required for elderly patients and individuals with pre-existing conditions like hypertension or impaired (non-severe) organ function.

What should I know about interactions with other medicines?

Licostan Interactions with other medicines and products

Interaction Scope

Official regulatory documentation requires review of concomitant use with several categories of medicinal and non-medicinal products. Medicinal product categories with documented interactions include strong inhibitors of the Cytochrome P450 3A4 (CYP3A4) enzyme, fibrates, and certain immunosuppressants.

The mechanistic basis of these interactions is primarily the inhibition of Licostan's metabolism via the CYP3A4 pathway or interference with drug uptake/transport, resulting in increased systemic exposure. Specific interacting medicines explicitly listed in official labels include Itraconazole, Gemfibrozil, and Cyclosporine.

Interaction-Related Constraints

Interaction-related restrictions include a formal statement to avoid concurrent use with specific potent CYP3A4 inhibitors. Use with other interacting medicines, such as Amiodarone or Verapamil, is classified as Use with Caution and is subject to official maximum daily dose limitations.

Timing-based interaction rules are mandated for co-administration with antacids containing polyvalent cations, which must be separated from Licostan by at least two hours to preserve proper absorption. Population-specific interaction notes caution that the risk of interaction-related systemic events may be elevated in the elderly and in patients with underlying renal impairment.

Resulting Interaction Structure

  • Concomitant use with strong inhibitors of the CYP3A4 pathway is documented to result in significantly increased exposure of Licostan.
  • Specific daily dose limitations are set for Licostan when co-administered with certain medicines, including Gemfibrozil and Cyclosporine.
  • The use of antacids containing polyvalent cations requires a mandated time separation to prevent a decrease in Licostan absorption.

Regulatory documents define the product’s interaction structure primarily through pharmacokinetic constraints, formalizing mandatory restrictions or specific dose limitations based on the Inhibition of CYP3A4 metabolism and Absorption interference to manage changes in Licostan levels.

Mechanism of Action

How Licostan Works at the Molecular Level

Licostan (Mefenamic Acid) exerts its physiological influence through a multi-faceted pharmacological profile, primarily targeting the signaling cascades that regulate inflammatory and nociceptive physiological responses.


Inhibition of Prostaglandin Production

This domain covers the drug's core action as a non-selective inhibitor of the Cyclooxygenase ( COX-1 and COX-2) enzymes. By interrupting the Arachidonic Acid Cascade, Licostan restricts the synthesis of pro-inflammatory and fever-inducing prostaglandins and eicosanoids, thereby reducing the magnitude of chemical signals at the tissue level.


Direct Modulation of PGE2 Receptors

Beyond enzyme inhibition, Licostan engages in a secondary mechanism by directly acting as an antagonist on specific E-type Prostanoid ( EP) Receptors that mediate physiological signaling. This direct receptor blockade functions to restrict the downstream impact of existing PGE2 activity and further alters the physiological responsiveness of peripheral nerve fibers to stimuli.


Central Nervous System Signal Adjustment

Via its action in the hypothalamic thermoregulatory center and specific CNS ion channels, the compound influences the processing of central physiological signals. The modulation of central pathways re-establishes the thermal set point and modifies the central transmission of nociceptive signals. The combined action across these mechanistic domains alters the activity of inflammatory and nociceptive pathways, resulting in a modified physiological response.

Dosage and Administration Information

The administration of Licostan (Mefenamic Acid) is based on specific oral dosing, frequency, and duration limits. The primary route of administration is oral, with dosage forms available as 250 mg capsules and 500 mg tablets.

Administration Guidelines

The regimen is defined by a standardized sequence of administration. An initial dose of 500 mg is taken at the start of treatment. This is followed by a maintenance dose of 250 mg administered every 6 hours as needed. Alternatively, a regimen of 500 mg three times daily (TID) may be employed. The maximum daily intake is generally limited to 2000 mg across all approved indications.

Administration Scope Requirement
Timing in Relation to Meals Administration should occur with food or milk to aid ingestion.
Duration Constraint Use is strictly short-term: therapy for general acute pain typically does not exceed 7 days, and treatment for cyclical discomfort is limited to 2 to 3 days per menstrual cycle.
Age-Group Rule Adult dosing schedules apply to patients 14 years of age and older.

The central procedural constraint for Licostan is the use of the lowest effective dose for the shortest duration necessary. For cyclical conditions, administration begins at the onset of menstrual bleeding and associated symptoms.

Recent Clinical Evidence

Research evidence / Overview of Studies for Licostan

This section provides a summary of the clinical research and evidence base that has been conducted on Licostan (Mefenamic Acid). This overview describes the types of studies that exist, the symptoms they examined, and the areas where more research is needed, without offering any clinical advice or recommendations.


Evidence Base for Acute Pain and Menstrual Conditions

The evidence for Licostan's use in studies exploring mild to moderate acute pain and pain related to primary dysmenorrhea (menstrual cramping) is primarily built upon short-term, controlled research trials. For acute pain, research examined the compound during periods of heightened symptom activity, with outcomes related to time until changes in pain scores were measured. In the context of primary dysmenorrhea, research highlights changes measured during the study period related to the severity of menstrual cramping.

Studies specifically evaluating Licostan for heavy menstrual bleeding (menorrhagia) assessed short-term symptom patterns over defined time intervals (typically three consecutive menstrual cycles). Findings indicate patterns related to a change in the objective quantity of menstrual blood loss measured during the study period.


Evidence for Chronic Symptom Management and Uncertainty

The evidence base related to the study of symptoms associated with chronic inflammatory joint conditions like rheumatoid arthritis (RA) and osteoarthritis (OA) involves clinical trials that explored long-standing physical discomfort. Research examined outcomes reflecting daily functioning, such as measuring changes in joint swelling, morning stiffness, and general patient-reported mobility. Importantly, these findings describe symptom patterns only and studies did not monitor the long-term progression of the joints.


Research Gaps and Treatment Duration

The majority of high-quality research on Licostan involved short observation periods for acute or episodic symptoms. This means that research highlights what has been observed so far during defined, short time intervals, such as a single week for acute pain. Evidence describing long-term effects on the body is generally not fully established by the core efficacy trials, as follow-up durations were limited across many studies. Data for certain groups, such as adults over 65, also remain insufficient within the core efficacy trials to draw definitive patterns related to symptom management.

Key Studies & References

  1. Mefenamic Acid (Drug Information Overview) - MedlinePlus, National Library of Medicine
  2. Mefenamic Acid (LiverTox) - National Institutes of Health
  3. Mefenamic Acid Capsules (Official FDA Label/DailyMed Monograph) - U.S. National Library of Medicine
  4. Non-steroidal anti-inflammatory drugs (NSAIDs) for treating rheumatoid arthritis - National Center for Biotechnology Information

Frequently Asked Questions (FAQ)

Common questions about Licostan (FAQ)


Q: What is the primary function of Licostan?

Official regulatory documents state that Licostan is indicated for the relief of mild to moderate acute pain and for treating primary dysmenorrhoea (cyclical menstrual pain). It is also approved for the symptomatic relief of specific inflammatory conditions, such as rheumatoid arthritis.


Q: What is the active ingredient found in Licostan?

The active substance contained in Licostan is mefenamic acid.


Q: What drug category or class does Licostan belong to?

Licostan is classified as a Nonsteroidal Anti-inflammatory Drug (NSAID). It belongs to a specific subgroup of NSAIDs known as the fenamate group.


Q: Is Licostan available under a common generic name?

Yes, Licostan is a brand name for the generic substance mefenamic acid.


Q: What makes Licostan different from older treatments for the same condition?

Official documents describe Licostan's action as multi-faceted. In addition to inhibiting the production of prostaglandins (common to many pain relievers), official product information describes a secondary mechanism where it acts by directly blocking specific prostanoid receptors in the body.


Q: Are the common side effects of Licostan generally considered mild?

Many commonly reported side effects associated with Licostan, such as abdominal discomfort or headache, are often described as mild. However, official warnings also address the potential for rare but serious adverse events, including gastrointestinal bleeding and kidney problems.


Q: What are the most frequently reported side effects associated with Licostan use?

According to product information, frequently reported effects may include diarrhea, nausea, heartburn, and abdominal discomfort. Other common side effects listed are dizziness and nervousness.


Q: What information is available about the serious side effects listed in official documents?

Official regulatory warnings address serious risks associated with this drug class. These risks include the potential for gastrointestinal ulceration and bleeding, severe renal (kidney) dysfunction, and cardiovascular thrombotic events like heart attack and stroke.


Q: Is Licostan known to commonly cause feelings of drowsiness or fatigue?

Yes, drowsiness (also known as somnolence) and feelings of fatigue are explicitly listed among the potential side effects associated with Licostan use in official documents.


Q: Does Licostan have an interaction risk with alcohol consumption?

Official warnings indicate that the regular daily use of alcohol, especially when combined with Licostan, is documented to increase the risk of serious gastrointestinal side effects. This includes a heightened risk of bleeding in the stomach or intestines.


Q: What specific over-the-counter medicines should be checked for interaction with Licostan?

Patients are cautioned in official documents against taking Licostan concurrently with other NSAIDs (e.g., ibuprofen or naproxen) or with aspirin. This is due to an increased risk of side effects, including stomach upset and ulcers.


Q: Are there any required dietary restrictions or foods to avoid while taking Licostan?

Official instructions recommend taking the medication with food or milk to help with ingestion and stomach comfort. However, the regulatory labels do not specify any particular foods or dietary components that must be strictly avoided beyond this administration guideline.


Q: Is Licostan contraindicated for people with severe kidney disease?

Yes, Licostan is formally contraindicated (use is restricted) in patients who have significantly impaired or pre-existing renal disease. This restriction is in place due to the potential for kidney toxicity associated with the medication.


Q: What are the official recommendations regarding Licostan use in children or adolescents?

Official guidelines state that the adult dosing schedule generally applies to patients 14 years of age and older. For pediatric patients under the age of 14, use of Licostan is contraindicated by some regulatory bodies.


Q: Is there a specific patient demographic that should not use Licostan?

Official regulatory documents list several contraindications for Licostan. These include patients with a history of asthma or allergic reactions to NSAIDs, active gastrointestinal ulceration, severe heart failure, and those recovering from coronary artery bypass graft (CABG) surgery.


Q: Does Licostan impact a person's ability to drive or operate machinery safely?

Warnings in the product information state that Licostan may cause side effects such as drowsiness and dizziness. Official product information notes that performing tasks requiring full mental alertness, such as driving or operating heavy machinery, may be impaired.


Q: Does Licostan need to be protected from light or heat during storage?

General official storage guidance recommends keeping the medication at room temperature. It should also be protected from excess heat and moisture to maintain its stability and effectiveness.


Q: Why is Licostan only available with a prescription?

Licostan is regulated as a prescription drug due to its NSAID classification and the potential for serious risks. These risks, which include cardiovascular and gastrointestinal adverse events, require medical supervision and professional guidance for appropriate use.


Q: Does Licostan carry any information regarding a risk of physical addiction or dependence?

Licostan is classified as a Nonsteroidal Anti-inflammatory Drug and is not typically associated with the risk of physical addiction or dependence. This risk profile is different from that seen with certain other classes of pain medications (controlled substances).


Q: How does Licostan generally affect body weight or appetite?

Changes in appetite, specifically loss of appetite, have been reported as a potential side effect in product information. The drug's influence on overall body weight is not commonly highlighted as a major adverse event.


Q: Are there different approved Licostan formulations (e.g., liquid, extended-release)?

The commonly approved dosage forms listed on official labels are 250 mg capsules and 500 mg tablets. The availability of other formulations, such as liquid or extended-release versions, is not uniformly confirmed across all standard regulatory documents.


Q: Does Licostan carry any specific warnings for individuals with heart conditions?

Official warnings address an increased risk of serious cardiovascular events, including heart attack and stroke. Official warnings note that use is contraindicated for patients in the peri-operative setting of CABG surgery or those with severe heart failure.


Q: Is Licostan safety-reviewed for use by pregnant women?

Official information advises against using the drug from 30 weeks gestation onward due to the risk of fetal harm. For the period between 20 and 30 weeks, use is generally limited to the lowest effective dose for the shortest possible duration.


Q: What is the official information regarding Licostan use while breastfeeding?

Regulatory documents indicate that trace amounts of Licostan may be present in breast milk. Official guidance notes that a decision must be made regarding whether to discontinue nursing or discontinue the medication, factoring in the importance of the drug for the mother’s health.


Q: Are there any rare but serious allergic reactions associated with Licostan?

Serious, sometimes fatal, allergic and hypersensitivity reactions have been associated with Licostan, including anaphylaxis. Official warnings also specifically address the possibility of severe skin reactions like Stevens-Johnson Syndrome.


Q: Can Licostan be taken with other prescription medications used for the same condition?

Regulatory warnings generally advise caution and often explicitly warn against combining Licostan with other NSAIDs, even if they are prescribed to treat the same condition. This combination may increase the risk of serious adverse events.


Q: Is it common for Licostan users to experience a change in sleeping patterns?

Drowsiness (somnolence) is listed as a possible side effect in product information, which could potentially affect sleep. However, specific documentation on generalized changes to overall sleeping patterns is not uniformly detailed.


Q: What essential health information should be shared with a healthcare provider before prescribing Licostan?

Official warnings state that a healthcare provider needs to be informed of any history of heart conditions, stroke, gastrointestinal bleeding or ulcers, kidney or liver disease, asthma, and the patient's current pregnancy status.


Q: Is Licostan a new drug, or has it been available for a long time?

Mefenamic acid, the active ingredient in Licostan, was first approved in the United States in 1967. This indicates that the drug has been available and subject to regulatory oversight for an extended period.


Q: Is Licostan known to cause headaches or migraines?

Yes, headaches are explicitly listed as one of the reported side effects of Licostan in official adverse reaction documents.


Q: What is the relationship between Licostan and blood pressure changes?

Official warnings state that Licostan, like other NSAIDs, can be associated with an increase in blood pressure. The drug may also potentially worsen pre-existing hypertension, and this may require close monitoring.


Q: Can Licostan be used by people with a history of seizures or epilepsy?

Official documents note that caution is required for individuals with pre-existing neurological disorders. While seizures are rare, they have been reported in cases of Licostan overdose.


Q: Does Licostan interact with common cold, allergy, or flu medications?

Patients are warned against taking Licostan with common cold, allergy, or flu medications that contain other Nonsteroidal Anti-inflammatory Drugs (NSAIDs) or aspirin. Concurrent use may increase the risk of side effects.

How should Licostan be stored and disposed of?

How to Store and Dispose of Licostan (Mefenamic Acid)

Official regulatory guidelines strictly define the storage and disposal of Licostan to maintain its stability and ensure public safety.


Storage Requirements

Licostan must be stored at controlled room temperature, generally not above 30°C, and must be protected from excess heat and moisture. It is critical to keep the medication in the original container and ensure the container remains tightly closed.


Child Safety and Disposal

To prevent accidental ingestion, Licostan must be kept strictly out of sight and reach of children, with the safety cap locked. Do not keep outdated medicine or medicine that is no longer needed. For disposal, follow official guidelines: do not flush down the toilet or throw into drains. Consult a pharmacist or utilize a drug take-back program. If household trash disposal is permitted, the drug must be mixed with an undesirable substance and sealed.

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

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