Indofen

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Indofen

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Medically reviewed

Laura Arias

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 Indofen

Quick Facts

Property Description
Active Ingredient Diclofenac (commonly as Diclofenac Sodium)
Form Tablets, Capsules, Gels/Solutions (Variable)
Pharmacological Class Nonsteroidal Anti-inflammatory Drug (NSAID)
General Purpose Relieves pain, reduces swelling, and lowers fever
Origin Synthetic (chemically produced)

What is Indofen? Classification and Composition

Indofen's primary ingredient is Diclofenac, a synthetic compound chemically classified as a phenylacetic acid derivative. This core component immediately places the drug in the Nonsteroidal Anti-inflammatory Drug (NSAID) class. The drug is typically formulated as the salt, Diclofenac Sodium, to enhance its stability and absorption. The pharmaceutical composition is widely clinically recognized for its efficacy and forms the basis for numerous commercial preparations globally. The preparation's origin as a synthetic compound ensures high consistency across its various dosage forms, which include tablets, capsules, and solutions for topical or parenteral routes.

Diclofenac's Pharmacological Type and Purpose

As an NSAID, Indofen is a key agent in the management of pain that is linked to inflammation. It achieves its effect by interfering with the biological pathway that produces inflammatory chemicals. Diclofenac is highly regarded globally for its utility, with the substance included on the WHO Model List of Essential Medicines. This inclusion solidifies its authoritativeness and essential role in therapeutic medicine. The overarching purpose of Indofen is to provide comprehensive symptomatic relief through its inherent anti-inflammatory, analgesic (pain-relieving), and antipyretic (fever-reducing) properties. By addressing these three key symptoms, the preparation acts as a reliable tool for mitigating discomfort driven by the body's natural inflammatory processes.

Regulatory References

  1. Diclofenac: MedlinePlus (NIH)

What side effects are possible with Indofen?

Possible Side Effects and Safety Information

Indofen (Diclofenac) is associated with an official safety profile that categorizes adverse reactions based on their frequency and the body system affected, according to regulatory standards (SmPC, FDA). Safety information addresses risks across various System-Organ Classes, including the Gastrointestinal, Cardiovascular, Nervous, Hepatobiliary, and Renal and Urinary systems.

Frequency and Common Adverse Reactions

Adverse reactions are formally classified by incidence. Common reactions (occurring in 1% to 10% of users) generally include headache, dizziness, nausea, diarrhea, dyspepsia, abdominal pain, flatulence, and increased transaminases. Reactions classified as Rare or Very Rare include more severe events.

Serious Regulatory Safety Warnings

The medicine is associated with documented risks for serious cardiovascular thrombotic events (such as myocardial infarction and stroke). Risk is officially noted to increase with duration of use and is associated with higher doses. There is also a risk of serious gastrointestinal adverse events, including bleeding, ulceration, and perforation, which may occur without warning symptoms. Severe, life-threatening reactions such as hepatic failure and Stevens-Johnson Syndrome (SJS) are listed as very rare but documented events.

Population-Specific Safety Considerations

The official labeling includes specific restrictions. Indofen is contraindicated in patients with established congestive heart failure (NYHA Class II–IV), severe renal or hepatic impairment, and is avoided during the last trimester of pregnancy. Older adults are noted to have a greater risk for serious gastrointestinal adverse events.

Overdose and Emergency Response

Indofen Overdose and when to seek help

The official regulatory profile for Indofen (Diclofenac) mandates the need for immediate medical intervention in cases of suspected overdose.


Documented Clinical Manifestations

Overdose may present with various symptoms, primarily affecting the gastrointestinal tract and the central nervous system. Documented signs include Nausea, Vomiting, Epigastric pain, and Gastrointestinal bleeding. CNS effects observed include Drowsiness, Tinnitus, Dizziness, and Headache.


Acute Severe Outcomes and Organ Toxicity

A significant concern noted in regulatory labeling is the risk of severe organ toxicity. These potentially life-threatening outcomes include Acute renal failure and Hepatic dysfunction. Neurological complications such as Convulsions, Seizures, and Coma are also documented, particularly in cases of severe poisoning. Overdose severity may be heightened in patients with pre-existing impaired renal or hepatic function.


Mandated Emergency Actions and Management

The official guidance is to seek immediate medical attention and contact emergency services immediately upon any suspicion of overdose. Treatment described in regulatory documents is purely Symptomatic and supportive. There is no specific antidote known for Indofen overdose. Procedures that may be considered include Gastric decontamination, such as the use of activated charcoal or gastric lavage, and the requirement for close medical monitoring in a hospital setting for the maintenance of vital functions.

Therapeutic Uses of Indofen

What Indofen Treats: Main Uses and Benefits

Indofen (Diclofenac) is commonly used across domains where additional symptomatic support is needed, primarily focusing on symptoms related to physical discomfort, inflammatory states, and systemic imbalance. The medication is broadly relevant for managing acute and chronic discomfort associated with inflammatory processes.

It is generally applied in conditions characterized by periods of heightened symptoms, including the long-term management of disorders like osteoarthritis, rheumatoid arthritis, and ankylosing spondylitis. The medication is also used for acute issues such as soft tissue injuries (sprains and strains), post-operative trauma, primary dysmenorrhea (menstrual cramps), and acute migraine attacks.

“It helps address symptom clusters that may become intense or disruptive, contributing to easing the overall symptom burden.”


Quick Fact: Relief for Inflammation

Symptom Domain Conditions Managed Key Benefit
Joint Pain, Swelling, Stiffness Chronic arthritis, Musculoskeletal injuries Supports patients during episodes of heightened discomfort

The medication is often used when symptoms intensify and supportive relief is needed, offering symptomatic support that helps patients cope more steadily with difficult episodes. This application may assist with maintaining a sense of stability when symptoms are more noticeable and provides supportive relief when symptoms interfere with routine activities.

Regulatory References

  1. Diclofenac - StatPearls - NIH

Eligibility and Restrictions for Use

Who can and cannot use Indofen?

The official eligibility for Indofen (Diclofenac) is strictly defined by government regulatory documents, focusing on patient status and pre-existing conditions.


Populations That Must Not Use (Contraindicated):

Indofen is strictly contraindicated in several groups due to absolute prohibitions. This includes patients with a known hypersensitivity to Diclofenac or any NSAID, or a history of NSAID-induced asthma. Use is prohibited in patients with active gastrointestinal ulceration or bleeding, as well as those with severe hepatic failure or severe renal failure. The medicine must not be used for pain after Coronary Artery Bypass Graft (CABG) surgery, and is contraindicated in the last trimester of pregnancy.


Populations with Restricted Use:

Adults are the primary approved population. Use in children under 12 years of age is generally not established for oral formulations, and is not recommended for many strengths. Caution is mandatory for elderly or frail patients, and those with pre-existing controlled hypertension or mild-to-moderate renal impairment. Furthermore, the medicine is not recommended for women who are breastfeeding, and patients with established cardiovascular disease should use it only after careful assessment.

What should I know about interactions with other medicines?

Interactions with other medicines and products

Indofen (Diclofenac) has officially documented interaction patterns that primarily involve pharmacodynamic risk reinforcement and systemic exposure modification, as defined in regulatory documents.

Documented Interaction Patterns

Co-administration with anticoagulants (e.g., Warfarin), antiplatelet agents, corticosteroids, or Selective Serotonin Reuptake Inhibitors (SSRIs) carries a documented increased risk of serious gastrointestinal bleeding.

Interacting Substance/Category Official Interaction Outcome
Diuretics / ACE Inhibitors / ARBs Risk of diminished antihypertensive or natriuretic effect and heightened risk of renal toxicity in susceptible patients.
Lithium or Methotrexate Diclofenac can increase the plasma concentrations of these co-administered drugs.
CYP Enzyme Inhibitors (e.g., Voriconazole) Increased systemic exposure to Diclofenac due to a documented pharmacokinetic interaction.

Interaction-Related Restrictions

  • Use is formally contraindicated for the management of perioperative pain in the setting of Coronary Artery Bypass Graft (CABG) surgery.
  • Co-administration with other systemic NSAIDs is generally avoided due to the potential for additive adverse effects.
  • The use of alcohol is identified as a factor that increases the risk of serious GI adverse events.

Food co-administration with delayed-release tablets results in a delay in the onset of absorption and a reduction in peak plasma levels, though the extent of absorption is not significantly affected.

Mechanism of Action

Targeting Prostaglandin Synthesis via COX Inhibition

Indofen's mechanism begins with the non-selective competitive inhibition of Cyclooxygenase (COX) enzymes, primarily COX-2, which are central to the Arachidonic Acid Cascade. By blocking these enzymes, the molecule prevents the conversion of its substrate into prostanoids like Prostaglandin E2 (PGE2) . This action modifies the early molecular steps that drive the body's inflammatory and nociceptive signaling.

Modulating Peripheral and Central Signaling

The resultant reduction of PGE2 exerts its physiological effects peripherally by preventing the sensitization of nociceptors (pain receptors), which constitutes a fundamental step in the body's modulation of afferent signaling. Centrally, the mechanism involves suppressing PGE2 in the hypothalamus, which modulates the body's core temperature set point. These combined actions result in the modulation of the body's overactive inflammatory and thermoregulatory signaling.

Mechanism Limitations and Localized Persistence

A feature of the mechanism is the molecule's accumulation and prolonged residence time within specific tissues, such as the synovial fluid of joints. Functionally, the non-selective nature of the mechanism involves the inhibition of COX-1, which suppresses the production of homeostatic prostaglandins involved in maintaining gastric mucosal integrity.

Dosage and Administration Information

Indofen (Indomethacin) is a nonsteroidal anti-inflammatory drug (NSAID) administered orally, rectally, or intravenously, depending on the condition being treated. This medication is typically prescribed at the lowest effective dose for the shortest duration necessary to meet treatment goals and minimize the risk of adverse effects.

General Administration Instructions

  • Oral Dosage Forms: To reduce the risk of gastrointestinal upset, Indofen oral capsules or suspension should be taken with food, immediately after meals, or with an antacid.
  • Extended-Release Capsules: Extended-release formulations must be swallowed whole. They should not be crushed, chewed, or cut, as this can affect the controlled release mechanism and may lead to an excessive dose being absorbed at once.
  • Oral Suspension: The oral suspension should be shaken well before each use to ensure the medication is evenly mixed.
  • Dosing Schedule: Take Indofen exactly as prescribed by a healthcare provider. Do not alter the dose, frequency, or duration of use without medical consultation. If a dose is missed, take it as soon as possible, unless it is almost time for the next scheduled dose. In that case, skip the missed dose and resume the regular schedule; do not double the dose.

Typical Adult Dosing (Examples)

The specific dose and formulation of Indofen are highly dependent on the medical condition. Dosing is individualized and determined by a healthcare provider.

Condition Typical Starting Dosing Range Maximum Daily Dose
Rheumatoid Arthritis / Osteoarthritis 25 mg 2 to 3 times per day (Immediate-release) 200 mg
Acute Gouty Arthritis 50 mg 3 times per day (Immediate-release) 200 mg

Note: Extended-release capsules and rectal suppositories have different dosing regimens.

Recent Clinical Evidence

Research Evidence / Overview of Studies for Indofen

Evidence for Use in Chronic Joint and Inflammatory Conditions

Research exploring Indofen's use in conditions characterized by functional limitations, such as osteoarthritis, primarily relies on Randomized Controlled Trials (RCTs) that compare Indofen against a placebo or an active comparator. These studies examined outcomes related to physical discomfort and conditions characterized by fluctuating or episodic manifestations. Systematic reviews reported on the patterns of measured outcomes related to physical discomfort compared to placebo across multiple trials. Reports described how outcomes reflecting daily functioning or activity level were tracked, though the documentation notes that findings were mixed or that variability was observed between different formulations (e.g., oral vs. topical).

Evidence for Use in Acute Pain and Injuries

Indofen was studied for use in conditions involving periods of heightened symptoms, specifically acute pain following events like soft tissue injuries (sprains/strains) and certain post-operative trauma. Studies explored these areas using short-term, placebo-controlled RCTs focused on outcomes linked to inflammatory or irritative states. Data show patterns related to outcomes linked to inflammatory or irritative states that were observed in some studies when compared to placebo. The research highlighted changes measured during the brief study periods, and findings help contextualize short-term symptom patterns.

Gaps and Uncertainty in the Research Record

The evidence highlights what is known and what is still uncertain about Indofen's profile. A key limitation is the lack of head-to-head comparative evidence against certain other anti-inflammatory agents on long-term outcomes. Follow-up durations were limited across many pivotal studies. Data for certain groups, such as children and adolescents, or for pregnancy-related populations, remain insufficient in the official research record. The long-term functional outcomes in the oldest and most medically complex patients remain areas where data are still emerging and research is ongoing.

Frequently Asked Questions (FAQ)

Common questions about Indofen (FAQ)


Q: Is Indofen generally used for long-term health issues?

Regulatory guidance states that the medication should be used for the shortest duration necessary to achieve the treatment goal. This guidance is intended to support the minimization of potential risks associated with duration of use.


Q: Does Indofen make you feel drowsy or tired?

Effects on the central nervous system are reported in official product information. Less common adverse reactions like somnolence, which is the medical term for drowsiness, have been documented in regulatory reports. Other reported effects include dizziness.


Q: What are the most common reasons people stop using Indofen?

Regulatory documents report that the most frequent reasons for discontinuation of Indofen relate to adverse reactions affecting the gastrointestinal system. These issues include abdominal pain and dyspepsia (indigestion). Nervous system effects are also sometimes cited as a reason for stopping the medication.


Q: Can Indofen interact with common cold medicines?

Official regulatory warnings advise avoiding the combination of Indofen with other systemic nonsteroidal anti-inflammatory drugs (NSAIDs). Since many over-the-counter cold remedies contain other NSAIDs, such combinations carry the potential for additive adverse effects. Official documents may not list every specific multi-ingredient cold remedy.


Q: What is the recommended period of treatment with Indofen?

Regulatory documents advise that Indofen should be prescribed at the lowest effective dose for the shortest duration necessary to meet treatment goals. The specific length of therapy is an individualized matter.


Q: Does Indofen have a warning about driving or operating machinery?

Yes. If side effects such as dizziness, visual disturbances, or somnolence are experienced, regulatory warnings advise against driving or operating complex machinery. This guidance is based on the potential for impairment.


Q: What are the main things researchers are currently studying about Indofen?

Research areas include examining ways to address aspects of the drug's safety profile, such as developing new formulations designed to reduce overall systemic exposure. Research is also examining the substance’s potential for non-traditional activities outside its core anti-inflammatory function.


Q: Does the time of day matter when taking Indofen?

Regulatory documents and dosing schedules emphasize the correct frequency and administration conditions (such as taking it with food to reduce GI upset). While the official label does not typically specify a certain time of day, the timing should align with the prescribed dosing schedule.


Q: How quickly does Indofen usually start working?

Official pharmacokinetic data describes the rate at which the body processes the medication. The time to reach peak plasma concentration is specified, and this measurement is used to understand the timeline of the substance becoming available in the body.


Q: Can Indofen be taken with herbal supplements?

Official labeling warns against combining Indofen with any substance that might increase the risk of bleeding or alter the drug’s metabolism. Due to the lack of exhaustive regulatory lists, a healthcare provider should review any specific supplements that are being considered.


Q: Are there any specific foods to avoid while taking Indofen?

Regulatory labeling specifies that certain forms should be taken with food or an antacid to help reduce stomach upset. Alcohol use is associated with an increased risk of serious gastrointestinal adverse events.


Q: How long does the effect of one dose of Indofen usually last?

Regulatory pharmacokinetic data describes the drug's elimination half-life (t1/2). This measurement indicates the timeline for the concentration of the active substance to be reduced by half in the body.


Q: Can Indofen affect my sleep?

Official adverse event reports include insomnia (difficulty sleeping) as a documented reaction. However, this is typically categorized as an uncommon or rare event in the regulatory documentation.


Q: What should I do if the side effects of Indofen worry me?

Official patient information directs individuals to contact a healthcare provider if any side effects are severe, persistent, or cause concern. This allows for a clinical evaluation of the issue.


Q: Are there any reports about Indofen affecting mood?

Regulatory documents list psychiatric or central nervous system adverse events. These reports may include documented effects such as depression, anxiety, or nervousness, which are typically classified as rare or uncommon.


Q: Is it normal to feel a change in appetite while using Indofen?

Official adverse event lists include reports of anorexia, which is the medical term for loss of appetite. This is a documented side effect, though it is usually classified as uncommon or rare in regulatory documentation.


Q: Can men and women use Indofen the same way?

Regulatory pharmacokinetic studies generally do not report any clinically significant differences in the drug's exposure or use based on sex. Dosing and administration are determined by the medical condition and specific patient factors.


Q: Is Indofen a controlled substance?

Regulatory bodies confirm the substance is not classified as a controlled substance. Therefore, it is not scheduled under the Controlled Substances Act by official government agencies.


Q: Where can I find the official prescribing information for Indofen?

Official regulatory bodies direct patients and providers to find complete prescribing information in the FDA's DailyMed database or the relevant European Medicines Agency (EMA) SmPC document. This provides access to the full official regulatory label.


Q: Is there a generic version of Indofen available?

The active ingredient, Diclofenac, is approved by regulatory bodies and is widely available from various manufacturers as a generic equivalent. This is tracked by regulatory agencies.


Q: Does Indofen require a prescription?

Indofen (Diclofenac) is officially defined by regulatory bodies as a prescription-only medicine (Rx). The drug's classification means its use must be initiated and overseen by a healthcare provider.


Q: Is there a risk of dependency or addiction with Indofen?

Regulatory labeling explicitly addresses this concern and states that Indofen is not associated with dependency, abuse, or addiction risk. The substance is not scheduled as a controlled drug.


Q: Is it normal to feel thirsty or dehydrated when using Indofen?

Regulatory adverse event reports may include issues related to fluid balance. While not common, these reports can include effects such as edema (swelling) or, less commonly, dehydration.


Q: Can Indofen cause dry mouth?

Official adverse event lists include reports of dry mouth (xerostomia) as a documented reaction. However, this effect is typically classified as an uncommon or rare side effect in regulatory documentation.


How should Indofen be stored and disposed of?

Storage and Disposal Requirements for Indofen

Official regulatory guidelines define specific conditions to maintain the stability of Indofen (diclofenac). Oral dosage forms must be stored at controlled room temperature, typically not exceeding 25 C or 30 C, depending on the formulation. The product must be securely kept out of the reach and sight of children.

Storage Conditions

The medicine requires protection from heat, moisture, light, and freezing. It must be kept in its closed, original container to maintain integrity.

Disposal Instructions

Patients must not keep outdated medicine or unused product. Disposal should follow official guidelines; patients are directed to ask a healthcare professional or local authority about drug take-back programs. Unused medicine should avoid release to the environment, and must not be disposed of via household wastewater.

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

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