Mefix

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Mefix

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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 Mefix

Property Description
Active Ingredient Mefenamic Acid
Form Oral Capsule, Tablet, or Suspension
Pharmacological Class Nonsteroidal Anti-Inflammatory Drug (NSAID)
General Purpose Analgesic, Anti-inflammatory, Antipyretic
Origin Synthetic Compound

What Type of Medicine is Mefix?

Mefix is a prescription-only medicine whose active component is Mefenamic Acid. It is classified as a Nonsteroidal Anti-Inflammatory Drug (NSAID), a class of synthetic drugs primarily recognized for modulating pain and inflammation responses. Chemically, Mefenamic Acid is a fenamate, an anthranilic acid derivative, which gives it a distinct structure within the broader NSAID group.

This specific pharmacological identity dictates its core therapeutic function. The drug works by reversibly inhibiting cyclooxygenase (COX) enzymes. This action blocks the synthesis of prostaglandins, which are chemical messengers responsible for signaling inflammation, pain, and fever in the body.

Composition, Forms, and General Purpose

The composition of Mefix centers on Mefenamic Acid as the single active ingredient. It is formulated for oral administration and is typically supplied as a capsule, tablet, or, for certain patients, an oral suspension. The formulation is completed by pharmaceutical excipients necessary for stability and proper delivery.

Mefenamic Acid's core function is to provide symptomatic relief. The general therapeutic purpose is to deliver simultaneous analgesic (pain-relieving), anti-inflammatory (swelling-reducing), and antipyretic (fever-reducing) effects. This combination is typically employed for the management of acute pain or inflammation, helping to mitigate physical discomfort.

What side effects are possible with Mefix?

Mefix: Possible Side Effects and Safety Information

Mefix is classified as a medical device for fixation, not a medicinal product. Consequently, its safety profile is primarily centered on local reactions to the skin rather than systemic adverse drug reactions.

Adverse Reaction Scope

Adverse events reported for this type of fixation product are typically confined to the Skin and Subcutaneous Tissue Disorders at the application site. These may include:

Key Adverse Reactions Description
Skin Irritation/Reddening Localized inflammation or erythema, often linked to prolonged wear or material sensitivity.
Maceration Softening and breakdown of the skin due to moisture buildup beneath the tape, especially during extended use.
Allergic Contact Dermatitis Hypersensitivity or allergic reaction to the adhesive or fabric components, potentially leading to itching and blistering.
Skin Stripping/Trauma Mechanical injury to the skin, which may occur during forceful or improper removal of the adhesive.

Formal frequency classifications (e.g., Common, Rare) are not generally defined in the regulatory documentation for this class of device.

Safety Considerations and Restrictions

Population-Specific Safety: Increased caution is documented as necessary for use on patients with fragile, compromised, or sensitive skin, such as the elderly, infants, and those receiving certain medications (e.g., long-term corticosteroids) that affect skin integrity.

Safety Restrictions:

  • Tension Avoidance: The material must not be applied under tension, particularly over joints or areas of movement, as this can generate shearing forces that cause skin damage (tension blisters or skin stripping).
  • Material Sensitivity: The product is noted to be manufactured without natural rubber latex or medicinal substances, which addresses common material sensitivities.
  • Device Integrity: Official instructions specify that the product should not be used if the packaging is damaged, ensuring the device remains clean and intact prior to application.

Regulatory Context: Safety for Mefix is governed by Medical Device Regulations (e.g., EU MDR, FDA), which require the manufacturer to adhere to strict essential requirements for performance and safety through its intended use.

Overdose and Emergency Response

The official regulatory profile for Mefenamic Acid (Mefix) overdose details severe central nervous system (CNS) and systemic manifestations that require immediate medical intervention. Documented clinical manifestations of overdose include convulsions (or seizures), vomiting, diarrhoea, and neurological changes such as confusional state, vertigo, and hallucination. Severe or life-threatening outcomes reported in official labeling include acute renal failure, coma, and fatalities, alongside systemic effects like hypoprothrombinaemia and metabolic acidosis.

Regulators mandate specific actions upon suspected overdose. The official prescribing information states that the stomach should be emptied immediately, and vital functions should be monitored and supported. Immediate medical attention must be sought, especially if severe symptoms like prolonged or recurrent convulsions occur. Patients are typically placed under observation for at least 12 hours.

Regarding management, no specific antidote is known for Mefenamic Acid overdose. Treatment, therefore, is symptomatic and supportive, relying on procedures such as gastric lavage and the administration of activated charcoal. Regulatory guidelines define specific ingestion thresholds for administering activated charcoal to both adults and children.

Therapeutic Uses of Mefix

What Mefix treats: Main Uses and Benefits

The primary role of Mefix (Mefenamic Acid) is to provide symptomatic support for distressing manifestations across therapeutic areas where short-term assistance is needed. It is commonly used to help with symptoms that create noticeable physiological strain, such as pain, inflammation, and fever.

Managing Menstrual Pain and Related Discomfort

Mefix is commonly used to help with the distressing symptoms related to physical discomfort characteristic of primary dysmenorrhea (menstrual cramps). It is also relevant in conditions involving menorrhagia (heavy menstrual bleeding), where it may assist with the management of excessive menstrual blood loss. This use offers symptomatic relief that helps patients cope more steadily with difficult episodes and contributes to improved day-to-day comfort during symptomatic periods.

Support for Acute and Procedural Discomfort

The medication is commonly used to help with mild to moderate acute pain manifestations, including common localized discomforts such as headaches and toothaches. It is applied in clinical settings that involve acute or unstable symptom patterns, such as managing post-operative pain or discomfort following the insertion of an IUD. This supportive relief assists with maintaining functional stability and helps ease the overall symptom burden of distressing physical manifestations.


Quick Fact: Symptomatic Support for Acute and Cyclical Discomfort Mefix is applied in settings marked by temporary physiological imbalance, supporting the management of pain and symptoms related to inflammatory or irritative states.

Regulatory References

  1. NIH DailyMed official drug label

Eligibility and Restrictions for Use

Mefix (Mefenamic Acid) eligibility is defined by regulatory criteria, limiting use to specific populations and strictly prohibiting it in others.

Populations for Whom Use is Contraindicated

Use is contraindicated and must be avoided in patients with:

  • Known hypersensitivity to mefenamic acid, aspirin, or any other Nonsteroidal Anti-Inflammatory Drug (NSAID).
  • Active ulceration or chronic inflammation of the gastrointestinal tract, or a history of recurrent GI bleeding.
  • Severe heart failure or severe renal failure.
  • Treatment of pain in the setting of Coronary Artery Bypass Graft (CABG) surgery.

Age-Related and Life-Stage Eligibility

The medicine is officially approved for adolescents 14 years of age and older and for adults. Safety and efficacy are not established in patients younger than 14 for its primary indications. Older adults require increased monitoring due to a higher risk of serious adverse events. Mefix is contraindicated during the last trimester of pregnancy and is not recommended for nursing mothers.

Eligibility-Related Restrictions

Caution is advised for patients with uncontrolled hypertension and in those with mild to moderate heart failure. Furthermore, use is not recommended in women who are attempting to conceive due to the potential for impairment of female fertility.

What should I know about interactions with other medicines?

Interactions with other medicines and products

The interaction profile for Mefix (Mefenamic Acid), an NSAID, is structured around serious pharmacodynamic and pharmacokinetic constraints outlined in regulatory labeling.

Co-administration with other systemic Non-Aspirin NSAIDs or COX-2 inhibitors is restricted due to an increased risk of serious gastrointestinal ulcers and bleeding. Furthermore, the medicine is formally contraindicated for managing peri-operative pain in the setting of Coronary Artery Bypass Graft (CABG) surgery.

Documented Pharmacokinetic and Pharmacodynamic Effects

Interacting Product Category Official Interaction Outcome
Oral Anticoagulants (e.g., Warfarin) Enhanced anticoagulant effect due to protein binding displacement, requiring close monitoring.
Antihypertensives (e.g., ACE Inhibitors, Diuretics) Diminished antihypertensive and diuretic effects. Increased risk of acute renal failure when combined with ACE Inhibitors or AIIAs, especially in the elderly.
Lithium, Methotrexate Mefenamic Acid reduces the renal clearance of these drugs, leading to the elevation of their plasma levels and increased risk of toxicity.
Oral Hypoglycaemic Agents (Sulfonylureas) Inhibition of metabolism, leading to a prolonged half-life and increased risk of hypoglycemia.

Administration Constraints

Mifepristone requires a mandatory timing separation; NSAIDs should not be taken for 8 to 12 days following its administration. The concurrent use of Alcohol (Ethanol) increases the documented risk of gastrointestinal bleeding. Additionally, Magnesium Hydroxide antacids significantly increase the rate and extent of Mefenamic Acid absorption.

Mechanism of Action

The content below is the final 100-200 word mechanistic markdown text with NO links

Physical Fixation and Mechanical Stability

The device exerts its primary action through a non-pharmacological, physical adhesion mechanism. The acrylic adhesive creates a high-contact interface with the stratum corneum of the skin, forming an external anchor point. This results in the mechanical stabilization of dressings and attached medical devices, which acts to reduce the transmission of shear forces and movement that could compromise the integrity of the secured item or skin surface.

Skin Microenvironment Regulation

Its function includes a water vapor diffusion mechanism facilitated by the porous, non-woven backing. This physical structure permits the passive transport of perspiration away from the skin's surface. This process influences the local microclimate beneath the tape, leading to a modulation of the local humidity interface with the stratum corneum.

Dynamic Conformance and Stress Distribution

The flexible fabric substrate allows the tape to conform and move naturally with body contours. This intrinsic force-distribution mechanism prevents excessive localized tension on the skin, contributing to the resulting physiological effect of distributing the mechanical load on the cutaneous tissue during movement.

Dosage and Administration Information

Official Administration Guidelines

Mefix is a self-adhesive fabric tape used for secure fixation of dressings, swabs, catheters, and tubes. The product is applied topically to the skin surrounding the device or dressing. Its use is determined on an as-needed basis to maintain secure fixation, and the tape should be changed when the integrity of the fixation is compromised or when the primary dressing requires replacement.

Administration Scope Detail
Route of Application Topical application to the skin.
Dosing/Size Rule Cut to the appropriate size to securely cover and affix the primary dressing or device.
Frequency/Schedule Apply as needed for secure fixation of dressings and medical devices.
Age-Specific Rules No specific adjustments are documented for pediatric or geriatric populations.

Procedural Steps for Application

The following sequence is used to ensure secure application:

  1. Preparation: Ensure the skin area where the tape will adhere is clean and dry.
  2. Sizing: Cut the tape to the desired shape and size using the pre-measured protection paper as a guide.
  3. Backing Removal: Separate the two parts of the protection paper by lightly stretching and bending the Mefix tape, and then remove the narrow part first.
  4. Application (Crucial Step): Apply the exposed adhesive part to the skin, taking care to not stretch Mefix when applying. This instruction is important when applying over joints to avoid tension.
  5. Securing: Remove the remaining protection paper and firmly smooth the Mefix tape to obtain proper adhesion, ensuring there are no wrinkles or air bubbles.

Special Procedural Condition

It is important to avoid stretching Mefix during application, especially over joints. The tape is designed for single use.

Recent Clinical Evidence

Mefix: Recent Clinical Evidence

The primary function of the Mefix self-adhesive fabric tape is to provide secure fixation for various medical devices and dressings, including wound pads, swabs, catheters, and tubes. Clinical data and product material analyses focus on the physical characteristics and skin tolerance of the retention tape.

Key Characteristics and Skin Tolerance

Research regarding the design of dressing retention tapes often centers on patient comfort and skin safety, particularly in individuals requiring prolonged or repeated use. Mefix is composed of a porous, non-woven polyester fabric coated with a water-based polyacrylate adhesive.

  • Skin Compatibility: The adhesive formulation is solvent-free and designed to be gentle on the skin. The material's porous structure is intended to allow air and water vapor to pass through, which may support skin health by reducing the risk of maceration beneath the dressing.
  • Conformability: The fabric is flexible and conforms well to the body's contours. This feature is important when securing dressings over joints or awkward areas, aiming to allow for a degree of natural movement without compromising the tape's integrity or causing shear forces on the skin.
  • Radiotransparency: The fabric and adhesive mass are described as radiotransparent, suggesting they may not need to be removed when a patient undergoes an X-ray procedure.

Application in Specialized Procedures

While predominantly known for dressing fixation, the term "Mefix" has also appeared in surgical literature in reference to a mesenteric fixation method (MEFIX) in specific complex gastrointestinal procedures. Early-stage retrospective studies and clinical trial protocols have explored the use of a mesenteric fixing technique in patients undergoing certain gastrectomies to potentially reduce the occurrence of Petersen's hernia.

Research in this surgical area indicates that this particular method of fixation may be faster to perform compared to traditional space closure techniques, without a noted increase in complication rates in limited study populations. However, this application involves a surgical technique and not the adhesive tape product itself, underscoring the term's use in distinct medical contexts.

Frequently Asked Questions (FAQ)

Common questions about Mefix (FAQ)


Q: Is Mefix considered a long-term or short-term treatment?

According to official product information for Mefenamic Acid, the medicine is intended only for short-term use. The maximum recommended duration of use for pain is generally seven days. For the management of menstrual cramps, use is typically limited to two or three days.


Q: Does Mefix have any known long-term side effects?

Regulatory documents state that long-term use of this class of drug (NSAIDs) may be associated with an increased risk of serious cardiovascular events, such as heart attack or stroke. There is also an increased risk of serious gastrointestinal events, including bleeding, ulceration, and perforation. For this reason, the drug is approved only for short-term use, as specified on the label.


Q: How quickly do side effects from Mefix typically start after use?

Official information indicates that the highest risk for certain serious reactions, such as severe skin reactions, is described as occurring relatively early in the course of therapy. This can often happen within the first month of treatment. However, official information also notes that other adverse events may occur at any time during use.


Q: Are there any specific foods that should be avoided while using Mefix?

The official product information does not generally advise patients to avoid specific foods while taking Mefenamic Acid. Official product information states that patients generally continue their normal diet. It is noted that alcohol increases the risk of gastrointestinal bleeding, and certain antacids can increase drug absorption.


Q: Does Mefix affect the results of standard lab blood work?

Yes, official safety information indicates that this medicine may interfere with certain laboratory tests. For example, it may cause false positive results for urine bile tests. Labeling describes that laboratory personnel need to be aware the patient is taking this medication to ensure accurate test interpretation.


Q: How long does it usually take to notice the full benefits of Mefix?

Studies indicate that the active component, Mefenamic Acid, is rapidly absorbed from the gut after oral administration, reaching peak levels in the blood within 1 to 4 hours. The pain-relieving effects of a single dose are commonly assessed over a 4 to 6-hour period.


Q: What is the expected duration of the effects of a single application of Mefix?

Official use is based on administration every 6 hours as needed for pain. This pattern suggests the therapeutic effect of a single dose lasts for approximately this amount of time. The half-life of the drug, which is the time it takes for the amount of drug in the body to be reduced by half, is approximately 2 hours.


Q: What should a patient do if they miss a scheduled use of Mefix?

Official guidance describes that if a dose is missed, patients are generally instructed to take it when recalled, unless it is close to the time for the next scheduled dose. In that scenario, the missed dose is typically skipped to avoid taking extra medication. Regulatory advice is explicit that a double or extra dose should not be taken.


Q: Is it necessary to take Mefix at the exact same time every day?

Mefenamic Acid is typically prescribed as needed for pain and not on a mandatory fixed schedule like some other medications. It is often taken every 6 hours and usually with food. Specific timing information is found within the instructions provided by the prescribing professional.


Q: Where can I find the official regulatory documents for Mefix?

Official prescribing information and regulatory documents, such as the FDA-approved label or Summary of Product Characteristics, are available on government health authority websites. This prescribing information is typically available on databases like DailyMed (US) or the official portals of other regulatory bodies.


Q: Is Mefix available as a generic version, or is it only sold under the brand name?

Official information confirms that Mefenamic Acid, the active ingredient in Mefix, is available as a generic oral capsule, in addition to any existing brand names. This means it is supplied both under its brand name and as a generic alternative.


Q: Does Mefix cause drowsiness or affect a person's ability to drive?

Yes, regulatory documents list drowsiness and dizziness as reported side effects of Mefenamic Acid. Official documents indicate that caution is necessary when performing tasks requiring mental alertness, such as driving or operating machinery, until a person is aware of how the medicine affects them.


Q: Is Mefix intended to relieve chronic pain?

According to official labeling, Mefenamic Acid is approved for the short-term treatment of mild-to-moderate pain and is not intended or approved for the management of chronic pain. The duration of use is specifically restricted to a few days or one week.


Q: Does Mefix affect hormonal balance?

Official product information notes that Mefenamic Acid may temporarily and reversibly affect female fertility by interfering with ovulation. Official product information states that its use is not recommended for women who are actively trying to conceive.


Q: Is there a maximum amount of time a person can safely use Mefix?

Regulatory authorities have set a maximum recommended duration of use for Mefenamic Acid. The maximum recommended duration of use for pain is seven days. For menstrual cramps, the duration is limited to two to three days.


How should Mefix be stored and disposed of?

How to Store and Dispose of Mefix?

The storage and disposal of Mefix (Mefenamic Acid) must strictly follow official regulatory requirements to maintain product stability and ensure safe waste handling.

Area Official Regulatory Condition
Temperature Store at controlled room temperature, typically 20 C to 25 C (68 F to 77 F). Do not store above 30 C.
Protection Keep container tightly closed. Protect from light and excessive moisture.
Child Safety Must be stored out of the sight and reach of children.
Disposal Dispose of unused or expired product according to local, regional, and national regulations. Do not flush down the toilet or throw into household waste.

Adherence to these conditions is necessary to validate the product's official shelf-life. Disposal must avoid entry into drains or surface water, emphasizing pharmaceutical waste protocols.

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

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