Megafen n

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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 Megafen n

Property Description
Active Ingredient Ibuprofen
Form Oral Suspension or Syrup
Pharmacological Class Nonsteroidal Anti-Inflammatory Drug (NSAID)
Origin Synthetic (Phenylacetic acid Derivative)
General Purpose Analgesic, Antipyretic, and Anti-inflammatory

What Type of Medicine is Megafen N? (Identity and Class)

Megafen N is identified as a single-ingredient, synthetic product containing the internationally recognized active substance, Ibuprofen. It is classified within the Nonsteroidal Anti-Inflammatory Drug (NSAID) pharmacological class. This classification relates to the drug's established capability to modulate inflammatory and pain pathways.

As a non-narcotic agent, Megafen N is positioned for symptomatic management where opioid involvement is not necessary. The formulation's primary differentiation lies in its active ingredient, which is recognized for its triple-action profile across diverse patient groups.

Composition and Available Drug Form

The therapeutic efficacy of Megafen N is derived from Ibuprofen. The product is presented as a liquid pharmaceutical preparation, specifically an Oral Suspension or Syrup. This form consists of the active Ibuprofen dispersed within an Aqueous Vehicle (water-based base), facilitating its administration via the Oral Route.

The choice of a liquid presentation is a feature of the formulation, as such forms facilitate precise, flexible dosing tailored to body weight, making it suitable for pediatric patient populations.

Primary Therapeutic Purpose

The fundamental purpose of Megafen N is to deliver symptomatic relief through its triple action: it is analgesic (pain-relieving), antipyretic (fever-reducing), and anti-inflammatory (swelling reduction). This profile is commonly employed for managing discomforts associated with conditions like minor sprains or systemic symptoms. Its mechanism involves the inhibition of the chemical mediators of pain and fever, providing a recognized form of non-narcotic relief.

What side effects are possible with Megafen n?

Possible Side Effects and Safety Information

Ibuprofen (Megafen N) is an NSAID, a pharmacological class associated with specific safety warnings and patterns of adverse reactions documented in official government regulatory documents.

Serious Adverse Reactions

Regulatory agencies emphasize the increased risk of potentially fatal cardiovascular thrombotic events, including myocardial infarction (heart attack) and stroke. This risk can occur early in treatment and may increase with the duration of use. Similarly, NSAIDs carry an increased risk of serious gastrointestinal adverse events, such as bleeding, ulceration, and perforation of the stomach or intestines, which may occur without warning symptoms.

Very rarely, severe skin reactions, including Stevens-Johnson Syndrome (SJS) and Toxic Epidermal Necrolysis (TEN), are reported, with the highest risk documented early in the course of therapy. Allergic-type reactions, such as anaphylaxis, are also officially documented.

Adverse Reactions by System-Organ Class

The most frequently classified adverse reactions involve the Gastrointestinal System, including common events like dyspepsia (indigestion), nausea, vomiting, and abdominal pain. Effects on the Nervous System may include headache, dizziness, and tinnitus (ringing in the ears). Long-term administration is associated with risks to the Renal System, including renal papillary necrosis, and the Hepatic System (liver dysfunction).

Population-Specific Safety Notes

Official labeling includes safety constraints for specific groups. Older adults are at a greater risk for fatal gastrointestinal bleeding and perforation. Dehydrated children face a documented risk of renal impairment. Ibuprofen is generally contraindicated in late pregnancy (30 weeks gestation or later) due to the risk of premature closure of the fetal ductus arteriosus.

Safety-Related Restrictions

The product is contraindicated in patients with a history of allergic-type reactions to aspirin or other NSAIDs and for the treatment of peri-operative pain in the setting of coronary artery bypass graft (CABG) surgery.

The official safety information structures the risk profile by prioritizing the communication of these serious, life-threatening events, while systematically classifying other adverse effects by organ system and frequency.

Overdose and Emergency Response

The official regulatory documentation for Ibuprofen (Megafen N) defines the profile of overdose based on specific clinical manifestations and mandated emergency responses. Ingestion of a potentially toxic amount requires immediate medical attention.

Documented Manifestations and Severe Outcomes

Overdose is commonly characterized by gastrointestinal effects such as abdominal pain, nausea, vomiting, and diarrhea. Central Nervous System (CNS) signs, including dizziness, headache, and tinnitus, are also documented. In severe cases, the regulatory labeling lists life-threatening systemic outcomes. These can include acute renal failure, metabolic acidosis, convulsions or seizures, coma, and respiratory depression. Cardiovascular findings such as hypotension, tachycardia, or bradycardia are also officially noted as possible severe effects. Specific documentation notes that children may be more sensitive to certain severe CNS effects, such as apnea and seizures.

Required Emergency Actions

Immediate medical attention must be sought for any suspected overdose or upon the manifestation of severe symptoms. Management is officially described as symptomatic and supportive treatment, as no specific antidote is known. Procedures such as the administration of activated charcoal and the correction of acid-base imbalance for metabolic acidosis are defined in the authorized product information. Hospital monitoring is required for an extended period following toxic ingestion.

Therapeutic Uses of Megafen n

What Megafen N Treats: Main Uses and Benefits

Megafen N is applied across therapeutic domains where additional symptomatic support is needed, such as in situations involving certain distressing symptoms or conditions presenting with systemic or localized discomfort. The medication is commonly used in situations involving acute or disruptive symptom patterns, and its core therapeutic action addresses pain, inflammation, and fever.

The medication is relevant for easing symptoms related to inflammatory or irritative states, including managing discomfort from osteoarthritis and rheumatoid arthritis; providing relief for pain and stiffness due to minor sprains and strains; and addressing acute, localized pain like headache, toothache (odontalgia), and menstrual cramps (dysmenorrhea).

It is commonly used to help with multiple symptoms that interfere with daily comfort, supporting individuals during symptomatic episodes by easing distress.

Quick Fact: Supports Management of Fever

  • Systemic Imbalance: Supports managing symptoms related to systemic imbalance, such as fever and generalized body aches, during symptomatic phases.

By managing these diverse symptom clusters, Megafen N relates to maintaining functional stability and easing the overall symptom load during symptomatic periods.

Eligibility and Restrictions for Use

Eligibility Map: Who can and cannot use Megafen n — official regulatory information

This medicine is a fixed-dose combination (Paracetamol/Ibuprofen) and its use is subject to restrictions for both components, particularly the NSAID, Ibuprofen.


Eligibility scope

Classification Restricted Population/Condition
Contraindicated Hypersensitivity to Paracetamol, Ibuprofen, or any excipient.
Contraindicated History of allergic reactions (e.g., asthma, angioedema) to Aspirin or other NSAIDs.
Contraindicated Severe hepatic failure or severe renal failure.
Contraindicated Active, or history of recurrent gastrointestinal ulceration/bleeding.
Contraindicated Third trimester of pregnancy.
Requires Caution Elderly patients (due to increased susceptibility to adverse effects).
Requires Caution Patients with mild to moderate renal or hepatic impairment (requires monitoring).
Requires Caution Patients with a history of cardiac impairment or uncontrolled hypertension.

Age-related eligibility rules

Age Group Eligibility Status
Children and Adolescents (under 18 years) Not intended for use (pediatric use not established/authorized).
Elderly (Age 65+) Use requires caution; increased risk of adverse effects (e.g., GI bleeding, renal impairment).

Connection to the overall eligibility profile

Regulatory documents strictly define who should not use this medicine based on the risks associated with the Ibuprofen and Paracetamol components. Absolute prohibition is established for patients with known hypersensitivity, severe organ failure (hepatic/renal), active GI bleeding/ulcers, and during the third trimester of pregnancy. Other populations, such as the elderly and those with pre-existing organ dysfunction, are subject to a restricted use requiring clinical caution and careful monitoring.

What should I know about interactions with other medicines?

The interaction profile of Megafen n (Ibuprofen) is defined by official regulatory documentation focusing on pharmacokinetic and pharmacodynamic constraints with other substances.

Official Interaction Statements

Classification Documented Interaction Pattern
Contraindicated Co-administration with other NSAIDs, including COX-2 selective inhibitors, is explicitly restricted due to an increased risk of gastrointestinal adverse events, such as bleeding [Source: EMA, FDA].
Exposure-Altering Ibuprofen increases the plasma concentration of Lithium by reducing its renal clearance, which carries an official risk of toxicity [Source: NIH, FDA]. Ibuprofen also increases the plasma concentration of Methotrexate.
Pharmacodynamic Risk Use with Anticoagulants (e.g., Warfarin), SSRIs, and Oral Corticosteroids officially increases the risk of serious gastrointestinal bleeding [Source: FDA, EMA].
Timing-Separation For patients taking immediate-release low-dose Aspirin for cardioprotection, regulatory labels specify a mandatory separation: Ibuprofen should be taken at least 30 minutes after or 8 hours before the Aspirin dose to avoid interfering with its antiplatelet effect [Source: FDA].
Metabolic Basis Co-administration with known CYP2C9 inhibitors may officially increase Ibuprofen exposure (plasma concentrations) [Source: EMA].
Renal Function Combination with Diuretics or Antihypertensives (ACE-Inhibitors/ARBs) can reduce the efficacy of these medicines and is documented to increase the risk of renal dysfunction [Source: FDA, EMA].
Substance Interaction The official label notes that regular, heavy Alcohol consumption concurrently with Ibuprofen increases the risk of gastrointestinal bleeding [Source: FDA].

Population-Specific Interaction Notes

Regulatory documents emphasize that the elderly population is at an increased frequency of severe adverse reactions when co-administered with interacting drugs. Patients with established renal impairment or heart failure are officially noted to be at a significantly greater risk of acute renal failure when combined with diuretics or certain antihypertensives.

This structure reflects the need for strict adherence to regulatory constraints and prohibitions detailed in official prescribing information.

Mechanism of Action

The action of Megafen N (Ibuprofen) is mediated by its interaction with specific internal enzyme systems. Its core mechanism is defined by the non-selective, reversible inhibition of the Cyclooxygenase (COX) enzymes, specifically both COX-1 and COX-2. This interaction initiates a cascade that influences pathways involved in inflammatory signaling and thermal regulation.

Modulation of Lipid Mediator Synthesis

This domain covers the drug's primary molecular interaction: the blockade of COX enzymes, which are the rate-limiting step in the Arachidonic Acid Cascade. By preventing the conversion of arachidonic acid into various prostanoids, the mechanism critically reduces the production of Prostaglandin E2 (PGE2). This suppression of PGE2 generation constitutes the primary molecular action underlying the drug’s resulting physiological consequences.

Central Thermoregulatory Pathway Adjustment

The localized reduction of PGE2 within the hypothalamus acts to restore the central thermoregulatory set-point, which may have been elevated by signaling molecules. This localized reduction affects the central autonomic pathways that govern thermoregulation.

Decreased Sensitization of Nociceptive Pathways

PGE2 normally acts to sensitize peripheral nociceptors (pain-sensing nerves); therefore, its suppression by the drug raises the activation threshold of these nerves. This physiological consequence reduces the pathological amplification of nociceptive signals and affects the signal transduction within the peripheral nervous system.

Dosage and Administration Information

Administration and Dosing Guidelines

Megafen n is formulated as an Oral Suspension (100 mg/5 mL) and is indicated for administration via the oral route. Correct administration involves shaking the bottle well before measuring each dose. The dosage is measured using the dosing device provided with the product, as household spoons typically do not provide accurate volume delivery.

Dosing is defined by patient population and use context. For adults, the standard dose for general use is 200 mg to 400 mg, with a minimum interval of four hours between doses. The maximum total daily dose for over-the-counter use is 1200 mg. For prescription use, such as managing chronic inflammatory conditions, the maximum daily intake can range up to 3200 mg in divided doses.

For pediatric patients (6 months and older), dosing is determined by body weight (mg/kg), typically using a range of 5 mg/kg to 10 mg/kg per single dose. The total daily intake should not exceed 40 mg/kg or 2400 mg, whichever is less. Administration can be performed with food or milk if stomach sensitivity occurs; this characteristic of administration is associated with a potential delay in the onset of action.

Megafen n is intended for short-term use; administration should not exceed 10 days unless directed for a chronic, long-term condition. Usage is typically guided by the principle of using the lowest effective dose for the shortest duration necessary.

Recent Clinical Evidence

Megafen n: Recent Clinical Evidence

Mechanism of Action Studies

Research has examined the pharmacological activity of Megafen n, identifying that it belongs to the class of non-steroidal anti-inflammatory drugs (NSAIDs). Like other NSAIDs, studies have explored its association with the inhibition of cyclooxygenase (COX) enzymes, which are responsible for the synthesis of prostaglandins (mediators of pain and inflammation). Further research continues to investigate the precise role of this activity in clinical disease processes.


Summary of Efficacy Trials

Key Study Findings

In clinical trials, researchers evaluated whether Megafen n was associated with a reduction in symptoms related to pain and inflammation, such as in cases of rheumatoid arthritis and osteoarthritis. A large Phase III Randomized Controlled Trial (RCT) evaluated the drug against a placebo and reported differences in outcome measures. The study noted that a measurable difference in symptom scores was observed in some participants as early as 4 weeks.

Studies Exploring Combination Use

Subsequent trials have explored the use of Megafen n alongside standard therapy. Analyses reported differences in the outcome profile for the combination group compared to the single-drug therapy group, though long-term data regarding overall prognosis remain under review. Research has also investigated the use of the drug in specific cohorts, including younger patient populations.


Reported Adverse Events

Safety data from pooled clinical trials were collected and analyzed. The most frequently reported adverse events across studies involved the gastrointestinal system, including nausea, diarrhea, and abdominal pain. Less common adverse events included headache and dizziness. Serious adverse events, such as gastrointestinal bleeding and renal (kidney) dysfunction, have been reported across all treatment arms, consistent with the known risks of the NSAID class.

Frequently Asked Questions (FAQ)

Common questions about Megafen n (FAQ)

Q: How quickly does Megafen n start to work?

Studies examining the pharmacokinetics of the active Ibuprofen component indicate that peak concentrations in the body are generally reached approximately one to two hours after taking the medicine. Regulatory documents also note that administration after a meal may slow down the rate at which the drug is absorbed.

Q: How long does the effect of Megafen n usually last?

The duration of the drug’s presence in the bloodstream is often described by its plasma half-life. Official product information indicates that the plasma half-life for the active Ibuprofen component is typically between 1.8 and 2.0 hours.

Q: Does taking Megafen n with food change anything?

Taking the medicine immediately following a meal may cause a reduction in the rate at which the active Ibuprofen component is absorbed by the body. However, official information also suggests that the total amount of the drug absorbed is not significantly affected.

Q: Can children or teenagers use Megafen n?

Official regulatory information states that this fixed-dose combination product is not intended for use in children and adolescents under 18 years of age. Eligibility requirements for this specific medicine define use for adult patient populations only.

Q: Does Megafen n cause drowsiness or make people sleepy?

According to the official product information, somnolence, which is the medical term for drowsiness or sleepiness, is listed as an uncommon adverse event. This means that it is a documented effect but is reported less frequently than common side effects.

Q: Can Megafen n affect my blood pressure?

Official safety warnings indicate that Nonsteroidal Anti-inflammatory Drugs (NSAIDs), including the Ibuprofen component of this medicine, can be associated with effects on blood pressure. This includes the onset of new hypertension (high blood pressure) or the worsening of blood pressure that is already high.

Q: Are there any common allergies related to Megafen n?

Official warnings address the risk of serious allergic-type reactions, also known as hypersensitivity, to the active substances or to any of the inactive ingredients (excipients) in the formulation. Patients with a known history of allergic reactions to Aspirin or other NSAIDs are specifically contra-indicated from using this medicine.

Q: I'm planning on becoming pregnant; what is the official advice about Megafen n?

Official regulatory warnings strictly state that this medicine is contraindicated—meaning it must not be used—during the third trimester of pregnancy. This restriction is due to the potential risk of harm to the fetus during this stage.

Q: Is it normal to feel a bit dizzy after starting Megafen n?

Official product information lists dizziness as a common adverse event associated with the active Ibuprofen component. Common means it is one of the more frequently reported effects in studies.

Q: Is Megafen n considered a scheduled drug?

The active component of this medicine, Ibuprofen, is officially classified as a Nonsteroidal Anti-Inflammatory Drug (NSAID). NSAIDs are not listed in the controlled substance schedules established by governmental bodies.

Q: Does Megafen n affect my ability to drive or operate machinery?

The active Ibuprofen component may cause adverse effects on the central nervous system, such as dizziness, somnolence (drowsiness), or visual impairment. Official guidelines note that these effects could potentially impact a person's ability to safely drive or operate complex machinery.

Q: Are there different strengths of Megafen n available?

The formulation discussed in the official guidelines for this product is exclusively the Oral Suspension (100 mg/5 mL). Official documentation does not specify other available strengths of the fixed-dose combination product.

Q: What is the difference between Megafen n tablets and capsules?

Official documentation describes this product, Megafen n, only in the form of an Oral Suspension or Syrup. The product is not officially presented as a tablet or capsule formulation.

Q: Is it common to experience mood changes with Megafen n?

Official product information lists psychiatric disorders as documented adverse events, which are related to mood and mental state. These include insomnia and anxiety (uncommon), and depression and confusional states (rare).

Q: What should I do if I think Megafen n is not working?

Official usage guidelines emphasize the regulatory principle of using the lowest effective dose for the shortest duration necessary to achieve symptomatic relief. These guidelines focus on maximizing benefit while minimizing potential risks associated with the drug class.

Q: How long after stopping Megafen n will it be completely out of my system?

Based on pharmacokinetics data for the active Ibuprofen component, the drug is virtually eliminated from the body within 24 hours of the last dose. This is consistent with its relatively short plasma half-life.

Q: Does Megafen n have any impact on sleep quality?

Official product information lists insomnia, which is difficulty falling or staying asleep, as an uncommon adverse event associated with the active Ibuprofen component. This is one of the documented effects on the central nervous system.

Q: What does 'non-directive use conditions' mean for this medicine?

This phrase is used in regulatory content to confirm that the factual information provided does not offer personalized medical advice or instructions. Instead, it describes the drug's properties and risks, leaving all clinical decision-making to the patient and their healthcare provider.

Q: Can I take Megafen n if I have diabetes?

Official warnings note that patients with risk factors for cardiovascular events, such as diabetes mellitus, are advised to use this medicine only after careful consideration. Regulatory guidelines specifically note that high doses should be avoided in these patient populations.

How should Megafen n be stored and disposed of?

How to Store and Dispose of Megafen N?

Megafen N (Ibuprofen Oral Suspension) must be stored according to official regulatory requirements to ensure product stability and safety.


Storage Requirements

  • Temperature: Store at Controlled Room Temperature, typically 20 C to 25 C (68 F to 77 F). The product must be protected from freezing and excessive heat.
  • Protection: The suspension must be stored in its original container with the cap tightly closed and protected from light and moisture.
  • Child Safety: It is mandatory to keep this and all drugs out of the sight and reach of children.

Disposal Instructions

Expired or unused medicine must be disposed of safely. The official method is to utilize a drug take-back program or an authorized collector. Medicines should not be disposed of via wastewater (flushed down the toilet or poured down the sink). If a take-back program is unavailable, mix the medicine with an undesirable substance, seal it in a bag, and place it in the household trash, following local regulations.

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

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