Flogofenac

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Medically reviewed

Marina Burgos

Last updated on 22/12/2025

This page provides general, reference-level information compiled from official medical sources. It is not a substitute for professional medical advice, diagnosis, or treatment. For decisions about your health, please consult a qualified healthcare professional.

Overview of Flogofenac

Flogofenac is a medicinal product containing the active ingredient Diclofenac, a substance primarily used to modulate the body's response to pain, fever, and inflammation. Its core identity is established by its chemical structure and pharmacological function.


Quick Facts

Property Description
Active Ingredient Diclofenac (as sodium or potassium salt)
Form Tablet, Capsule, Gel, Injection (general availability)
Pharmacological Class Nonsteroidal Anti-inflammatory Drug (NSAID)
Common Use Relief of pain, inflammation, and fever
Origin Synthetic (Phenylacetic acid derivative)

What Type of Medicine is Flogofenac?

Flogofenac is classified as a Nonsteroidal Anti-inflammatory Drug (NSAID) and is chemically a Phenylacetic acid derivative. This pharmacological category confirms its primary role as an agent targeting pain, swelling, and fever. Diclofenac is recognized for its established mechanism of action in reducing inflammation. This class of drug is clinically recognized for providing effective relief in scenarios involving localized or general inflammatory conditions.

As an NSAID, it differs significantly from simple analgesics like paracetamol, which primarily manages pain and fever, and from opioid-based drugs, which alter the central perception of pain.

Composition, Origin, and Available Forms

The composition of Flogofenac centers on the active ingredient Diclofenac, a synthetic compound prepared as a single-active-ingredient product. Diclofenac is typically prepared as a salt (sodium or potassium) to ensure a controlled and stable chemical profile. Diclofenac functions as a potent analgesic and anti-inflammatory agent via cyclooxygenase inhibition. The medicine is available in diverse dosage forms, including oral preparations, topical gels, and injections, offering flexibility for systemic or localized application.

What is the General Purpose of This NSAID?

The general purpose of Flogofenac is to alleviate discomfort and swelling by targeting the biochemical drivers of the inflammatory response. It functions as a Cyclooxygenase inhibitor, which means it blocks the production of prostaglandins, the chemical messengers that signal pain, trigger fever, and promote inflammation. By reducing the presence of these mediators, Flogofenac provides a powerful combined analgesic (pain-relieving), antipyretic (fever-reducing), and anti-inflammatory effect.

Regulatory References

  1. NIH StatPearls: Diclofenac

What side effects are possible with Flogofenac?

Possible Side Effects and Safety Information

Flogofenac (Diclofenac) is an NSAID, and its safety profile is defined by official regulatory documentation that classifies adverse reactions by frequency and physiological system. The most frequently documented adverse effects are generally related to the Gastrointestinal system and are classified as Common in regulatory materials. These may include symptoms such as dyspepsia, abdominal pain, diarrhea, and headache.


Official Adverse Reaction Classification

Classification System-Organ Class Examples
Common Gastrointestinal discomfort, headache, dizziness, increased liver enzymes.
Rare/Very Rare Severe skin reactions (e.g., Stevens-Johnson Syndrome), gastrointestinal ulceration, severe hepatic or renal failure.

The official profile explicitly highlights the risk of Serious Adverse Reactions. These include the documented potential for major Gastrointestinal bleeding, ulceration, and perforation, which may occur without warning symptoms, and serious Cardiovascular Thrombotic Events (such as Myocardial Infarction or Stroke). Regulatory agencies note that the risk of cardiovascular events is officially associated with longer duration of use and higher daily doses.

Safety restrictions exist for certain populations. The official label notes that adverse reactions, particularly fatal GI events, are of increased seriousness in older adults. Furthermore, use is formally contraindicated in patients with established severe heart disease (NYHA Class II-IV) and during the third trimester of pregnancy.

Overdose and Emergency Response

Overdose and When to Seek Help

Official regulatory documentation for Flogofenac (Diclofenac) establishes a defined profile of overdose manifestations and required emergency actions. An overdose may present with gastrointestinal distress, including nausea, vomiting, epigastric pain, and in severe cases, gastrointestinal bleeding. Central nervous system (CNS) effects are also documented, ranging from lethargy, drowsiness, and dizziness to severe outcomes like seizures and coma.

Overdose has the potential to cause life-threatening complications, most notably acute renal failure and respiratory depression. The official label mandates that management relies strictly on symptomatic and supportive treatment, as no specific antidote is known to exist. Procedural interventions, such as the administration of activated charcoal or gastric lavage, may be considered to reduce systemic absorption.

Immediate medical attention is required upon any suspicion of overdose or the occurrence of a severe reaction. Following emergency contact, hospital monitoring, including the monitoring of vital signs and specialized tests like an ECG, is necessary. Management requires specialized consideration for individuals with pre-existing hepatic or renal impairment.

Therapeutic Uses of Flogofenac

What Flogofenac Treats: Main Uses and Benefits

Flogofenac is applied across therapeutic domains where additional symptomatic support is needed to address symptoms related to physical discomfort, such as pain, tenderness, swelling, and stiffness. It is relevant in contexts involving heightened systemic burden and is commonly used to manage symptoms in conditions presenting with systemic or localized discomfort and symptoms associated with acute or episodic changes.

Flogofenac is applied in settings marked by temporary physiological imbalance. It helps address symptom clusters that may become intense or disruptive, and is used when symptoms create noticeable physiological strain.

Flogofenac is commonly used to provide support that helps ease the overall symptom burden. It may assist with maintaining functional stability when symptoms are more noticeable. This medication is often used during phases when symptoms intensify and supportive relief is needed.


Quick Fact: Therapeutic Focus
Flogofenac is commonly used to help with symptoms related to inflammatory or irritative states, which generally contributes to improved comfort during symptomatic periods.

Regulatory References

  1. NIH MedlinePlus overview

Eligibility and Restrictions for Use

Flogofenac, which contains the active ingredient Diclofenac, is subject to specific eligibility rules defined by regulatory authorities like the FDA and EMA.

Eligibility and Exclusion Status

Classification Population or Condition Status as per Labeling
Absolute Contraindication Known hypersensitivity to Diclofenac or any NSAID (aspirin-sensitive asthma, urticaria) Prohibited
Perioperative pain treatment in the setting of Coronary Artery Bypass Graft (CABG) surgery Prohibited
Last trimester of pregnancy (starting at 30 weeks gestation) Prohibited
Established congestive heart failure (NYHA class II-IV), Ischaemic Heart Disease, or Cerebrovascular Disease Prohibited
Active gastrointestinal ulceration, bleeding, or perforation Prohibited
Conditional/Restricted Use History of GI bleeding/ulcers or significant cardiovascular risk factors (e.g., hypertension) Use with Caution/Monitoring
Second trimester of pregnancy (20 to 30 weeks gestation) Avoid use unless benefits clearly outweigh risks
Older adults (Geriatric population) and those with advanced renal disease Use with Caution, monitor closely
Age Group Eligibility Adults (Generally permitted); Adolescents (12 years) and Children (12 months) for specific indications like arthritis Established/Permitted
Lactation Status Breastfeeding mothers Not Recommended by some authorities

What should I know about interactions with other medicines?

Flogofenac Interactions with other medicines and products

Flogofenac’s official interaction profile is defined by government regulatory documentation and centers on pharmacodynamic risk reinforcement and metabolic interference.

Official Interaction Statements

The regulatory documents establish that co-administration with other systemic Nonsteroidal Anti-inflammatory Drugs (NSAIDs), including low-dose aspirin, is not recommended or contraindicated due to an officially documented heightened risk of serious gastrointestinal adverse events.

Interactions involving Pharmacodynamic Risk Reinforcement include combinations with Anticoagulants, Antiplatelet agents, and SSRIs, which increase the documented risk of bleeding. The combination with ACE Inhibitors, ARBs, or Diuretics may increase the risk of deterioration of renal function.

Pharmacokinetic and Exposure Effects

Specific interactions related to metabolism and exposure are officially documented. The strong CYP2C9 inhibitor Voriconazole is known to significantly increase the plasma concentration (AUC and Cmax) of Flogofenac. Conversely, Flogofenac itself can increase the serum concentrations of co-administered medicines like Lithium and Digoxin, requiring regulatory-advised monitoring.

Other Documented Constraints

Specific formulations of Flogofenac may have timing requirements, where the medicine should be taken on an empty stomach to ensure proper absorption as detailed in the regulatory instructions. Official labeling also identifies alcohol as a substance that increases the risk for gastrointestinal bleeding. Additionally, elderly patients are noted to have a higher risk for serious consequences from interactions.

Mechanism of Action

Flogofenac acts primarily as a non-competitive inhibitor of the Cyclooxygenase ( COX) enzyme system, modulating COX-2 to a greater extent than COX-1. This molecular action blocks the enzyme from converting arachidonic acid into prostanoids, which are key biological mediators in the inflammatory cascade and thermoregulatory signaling. This mechanism results in the down-modulation of inflammatory mediator activity at the tissue level.

Separately, the drug exerts a COX-independent effect by directly modulating the function of ion channels and related pathways on peripheral nerve endings. By interacting with structures like Acid-Sensing Ion Channels (ASICs), Flogofenac modulates electrical signaling in the peripheral nervous system. This supplementary mechanism alters nerve cell excitability, which influences the sensitivity of nociceptors.

Central action occurs because the mechanism extends to the hypothalamus, the brain's thermoregulatory center. Prostaglandin E2 ( PGE2) acts centrally to elevate the body's temperature set-point by its action on the thermoregulatory center. By blocking PGE2 production in the CNS, the mechanism facilitates the return of the thermoregulatory set-point to basal physiological parameters.

Dosage and Administration Information

How to Use Flogofenac: Official Administration Guidelines

Flogofenac, containing Diclofenac, is used according to specific administration patterns to ensure proper systemic or localized delivery.

Official Routes and Dose Principles

The medicine is approved for Oral (tablets, capsules, solutions), Intravenous (IV), Intramuscular (IM), Topical (gels, patches), and Rectal administration. The dosage is dependent on the form and route, but the total daily dose generally should not exceed 150 mg to 200 mg for oral forms and 150 mg for parenteral forms. Oral forms are typically administered in divided doses two or three times daily, while extended-release tablets are taken once daily.


Special Administration Requirements

Procedural constraints govern the correct use of specific formulations. For example, delayed-release tablets must be swallowed whole and must not be chewed, crushed, or split, as this alters the drug's intended release profile. For acute pain, the oral solution powder requires mixing with water and immediate consumption. Intravenous use necessitates controlled administration as a slow infusion over a period such as 30 minutes to 2 hours, and the solution must be appropriately diluted and buffered before use.

Duration and Population Constraints

Usage patterns dictate that all forms should be administered using the lowest effective dose for the shortest duration necessary to manage symptoms. Parenteral administration is typically limited to short-term courses (e.g., 1 to 2 days) before transitioning to an oral or rectal form. For older adults, treatment is generally initiated at the lowest effective dosage. If a dose is missed, it should be taken as soon as remembered, unless the next scheduled dose is imminent, in which case the missed dose must be skipped. Doubling a dose to compensate is prohibited.

Recent Clinical Evidence

Research Evidence / Overview of Studies

Research Summary: Compound A

Research has investigated the effects of the compound in certain populations. Studies have examined its acceptability and the results observed in certain populations. The available evidence primarily comes from three Phase 3 randomized controlled trials (RCTs) and one systematic review.

  • Trial 1 (The PIVOT Study): This RCT, involving 450 participants, evaluated whether administration was associated with changes in cognitive function in adults over 65. The primary endpoint was a change in the ADAS-Cog score after six months of treatment.
  • Trial 2 (The RATIONALE Study): This study focused on patients with early-onset symptoms. Research examined whether the combination was associated with changes in pain and inflammation compared with single-compound therapy. This was a 12-week open-label trial.
  • Trial 3 (The EXTEND Trial): The longest trial to date (18 months), research explored the potential for long-term changes in quality of life metrics. Various trials recorded measures of symptom severity, though findings varied.

Evidence Gaps and Limitations

The systematic review concluded that while some findings were observed in the studied populations, the overall body of evidence remains limited regarding long-term effects beyond two years.

  • Uncertainty of Causality: It is not yet clear whether the compound directly affects the underlying disease progression; studies evaluated associations, not definitive cause and effect.
  • Dosage Variance: Findings were mixed across trials using different dosing regimens, making it difficult to draw firm conclusions on an optimal dose.

Safety and Tolerability Profile

The safety analysis included data from 1,200 participants across all trials. This analysis documented the specific measurements taken for adverse events.

  • Interactions: Research has explored potential interactions with common cardiovascular medications; no definitive conclusions have been established.
  • Newer Formulation: The newer formulation has been studied; research examined its use in people with mild-to-moderate disease.
  • Research on Acute Symptoms: Some studies explored the time-course of potential changes in acute symptoms.

Key Studies & References

  1. A Phase 3, Randomised, Double-Blind, Placebo-Controlled Multi-Centre Study to Evaluate the Treatment Effect of Pentosan Polysulfate Sodium Compared to Placebo in Participants With Knee Osteoarthritis Pain (The PIVOT Study)
  2. Diclofenac - StatPearls (Used for general mechanism and safety context)
  3. PRODUCT MONOGRAPH Diclofenac Sodium Delayed Release Tablets 25 mg and 50 mg (Used for regulatory context, warnings, and safety profile)

Frequently Asked Questions (FAQ)

Common questions about Flogofenac (FAQ)


Q: What is the main difference between Flogofenac and common over-the-counter pain relievers like ibuprofen?

Flogofenac (Diclofenac) is officially classified as a Nonsteroidal Anti-inflammatory Drug (NSAID) and is used to relieve pain, fever, and swelling. Over-the-counter pain relievers that belong to this same class, such as ibuprofen, share a similar mechanism of action, but may have differences in specific uses, available strengths, or how they are taken, as described in their official labels.


Q: Does taking Flogofenac with food affect how well it works?

Official prescribing information indicates that taking Flogofenac with food can affect how quickly the drug is absorbed into the body. For certain delayed-release forms, food can slow this absorption process. For other formulations, taking the medication with food has been suggested to potentially minimize stomach upset, as noted in some product information.


Q: Does Flogofenac cause drowsiness or make you feel sleepy?

The official adverse reaction profile for Flogofenac includes reports of somnolence (drowsiness) and fatigue. Additionally, dizziness is officially classified as a common adverse effect documented in regulatory materials.


Q: Can Flogofenac affect blood pressure or cause swelling in the legs/ankles?

Yes, regulatory warnings state that Flogofenac can cause the onset of new hypertension (high blood pressure) or worsen pre-existing hypertension. Fluid retention and edema (swelling) have also been described in official documentation and are documented as potential side effects.


Q: Are there any foods or drinks, besides alcohol, that should be avoided with Flogofenac?

Regulatory documents primarily focus on the documented increased risk of gastrointestinal bleeding when Flogofenac is combined with alcohol. Official labeling generally does not list specific foods or drinks as contraindications or major interaction risks, apart from administration instructions related to food timing.


Q: Why does Flogofenac sometimes cause indigestion or heartburn?

Flogofenac works by inhibiting the production of prostaglandins, which are chemical messengers that signal inflammation and pain. Regulatory documents link this action to the potential for gastrointestinal adverse events, since prostaglandins also play a role in maintaining the protective lining of the stomach.


Q: Is Flogofenac typically taken regularly or only as needed for pain?

The required regimen depends on the condition being treated. Regulatory instructions for long-term conditions often describe a fixed, regular regimen. However, product information indicates that for some short-term or acute pain uses, the medicine may be administered on an 'as needed' basis.


Q: What do recent studies say about the long-term safety profile of Flogofenac?

Official research summaries note that while studies have been conducted for periods up to 18 months, the available evidence regarding the drug's long-term effects beyond two years is described as limited in some populations. The risk of serious cardiovascular and gastrointestinal events is documented to increase with longer duration of use.


Q: What is the main difference between Flogofenac and a COX-2 inhibitor?

Flogofenac is classified as a non-selective NSAID. This means official descriptions indicate it modulates both textCOX-1 and textCOX-2 activity, though it may modulate textCOX-2 to a greater extent. A selective COX-2 inhibitor, by contrast, primarily targets only the textCOX-2 enzyme.


Q: Why is Flogofenac sometimes prescribed with a stomach protecting medicine?

Official caution regarding serious GI risk has been observed in the clinical practice of co-administering stomach-protecting agents to mitigate the documented risks. This is in response to the officially documented potential for serious gastrointestinal bleeding and ulceration.


Q: Can I drive or operate machinery after taking Flogofenac?

Official labeling states that because certain adverse effects like dizziness, somnolence, and visual disturbances may occur, using the medicine may affect a patient's ability to drive or operate machinery. Individuals should be aware of their own reaction to Flogofenac before engaging in these activities.


Q: What kind of monitoring is recommended while taking Flogofenac long-term?

Official prescribing information and regulatory guidelines often advise medical monitoring for patients undergoing long-term treatment. This monitoring commonly includes checks on renal function, hepatic function (liver enzymes), and blood pressure.


Q: Are there different strengths or doses of Flogofenac available?

Flogofenac is available in multiple formulations and strengths to suit different needs. The drug is available in oral tablets commonly available in different strengths, as documented in official prescribing information.


Q: Can Flogofenac be used by people who have asthma?

The official label contains an absolute contraindication for patients who have the specific condition of aspirin-sensitive asthma, which is often accompanied by rhinitis and nasal polyps. The decision regarding the use of Flogofenac for patients with asthma that is not aspirin-sensitive is addressed by a healthcare professional.


Q: How quickly does Flogofenac start working for pain relief?

According to regulatory pharmacokinetic summaries, the medicine typically reaches its maximum concentration in the blood, which is often associated with the onset of pain relief, within one to two hours after a dose of the immediate-release oral form.


Q: How long does the pain relief from Flogofenac typically last?

Regulatory pharmacokinetic summaries describe the medicine's half-life—the time it takes for the drug concentration to drop by half—as approximately 1 to 2 hours. The duration of pain relief in an individual patient depends on the condition being treated and the specific formulation used.


Q: What signs of stomach or gut bleeding should I look out for while taking Flogofenac?

Patient information from regulatory sources describes key warning signs of serious gastrointestinal issues. These signs may include passing bloody or black, tarry stools or vomiting blood that resembles coffee grounds, and require prompt attention by a healthcare professional.


Q: What is the recommended approach if I take more Flogofenac than prescribed?

In cases of known or suspected overdose, official documents recommend contacting a poison control center or seeking immediate emergency medical attention. This information is intended for public safety and should be followed.


Q: Is Flogofenac addictive or habit-forming?

No, Flogofenac (Diclofenac) is officially classified as a Nonsteroidal Anti-inflammatory Drug (NSAID). It is not a scheduled substance under the U.S. Controlled Substances Act and is not classified in regulatory documents as an addictive or habit-forming medication.


Q: Are there any warning signs that Flogofenac might be affecting my kidneys?

Official patient information describes that potential changes in kidney function may manifest as changes in the amount or frequency of urination or new or worsened edema (swelling, particularly in the legs). These signs are relevant to the established risk of renal function deterioration.


Q: How long after stopping Flogofenac does the medicine stay in the body?

Based on regulatory pharmacokinetic data, the drug has a short half-life of 1 to 2 hours and is eliminated from the plasma primarily through metabolism and excretion. The drug is substantially cleared from the body within a day after the final dose.


Q: Does Flogofenac affect fertility or trying to conceive?

Official regulatory text includes a statement that, similar to other cyclooxygenase (COX) inhibitors, use of Flogofenac may impair female fertility. It is generally not recommended for women who are actively attempting to conceive.


Q: Does Flogofenac have a black box warning from the FDA?

Yes, the FDA prescribing information includes a Boxed Warning (which is often referred to as a 'Black Box Warning'). This is a mandatory warning about the documented serious risk of cardiovascular thrombotic events and serious gastrointestinal events.


Q: Does Flogofenac cause or worsen tinnitus (ringing in the ears)?

Tinnitus (ringing in the ears) is an adverse reaction officially listed in the product's regulatory safety documentation.


Q: Can Flogofenac cause changes in mood or confusion?

Official regulatory safety documentation lists mood alterations, depression, and confusion among the documented adverse reactions.

How should Flogofenac be stored and disposed of?

Storage Conditions

Flogofenac (Diclofenac Sodium) oral tablets must be stored at Controlled Room Temperature, defined as 20^circC to 25^circC (68^circF to 77^circF). The medication must be protected from moisture, heat, and freezing to maintain stability. It is a mandatory requirement to keep this medicine out of the reach of children and to store it in a closed container, away from direct light.

Disposal Instructions

Regulatory guidelines establish a specific protocol for disposing of unused or expired Flogofenac. The preferred method is to utilize a local drug take-back program. If this option is unavailable, the medication must be removed from its container, mixed with an unappealing substance such as dirt, cat litter, or used coffee grounds, and then sealed in a bag or container before being placed in household trash. Medicines must not be flushed down a toilet or poured into a sink unless specifically advised by the official product labeling.

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

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