Metindol

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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 Metindol

Property Description
Active Ingredient Indometacin (Indomethacin)
Pharmacological Class Nonsteroidal Anti-inflammatory Drug (NSAID)
Common Use Symptomatic relief of inflammation, pain, and fever
Origin Synthetic compound (Indole derivative)

What Type of Medicine is Metindol?

Metindol is the trade name for a potent Nonsteroidal Anti-inflammatory Drug (NSAID), with its core action derived from the single active ingredient, Indometacin. This medication belongs to the NSAID class and is categorized based on its therapeutic action. The active substance is a synthetic compound, specifically an indole derivative, and is clinically recognized for its anti-inflammatory properties. Metindol is typically a prescription-only (Rx) medication, underscoring its pharmacological strength. It is prepared as a monotherapy product, meaning its therapeutic effect relies solely on the action of Indometacin.


Indometacin: Composition and Available Forms

The identity of Metindol is defined by the presence of Indometacin (Indomethacin) as the sole active ingredient, which is then formulated into various pharmaceutical preparations to suit different administration needs. This key component is incorporated into multiple high-level dosage forms for systemic or local application. These preparations include forms for oral use, such as capsules and tablets, for rectal administration like suppositories, and for localized application, such as ointments and gels. The availability across various forms, from systemic capsules to localized topical preparations, is a distinguishing feature that allows for flexible treatment approaches.


What is the General Purpose of Metindol?

The general purpose of Metindol is to provide symptomatic relief by modulating the body's response to inflammation, tenderness, and excessive body heat. As an NSAID, the medication primarily works by blocking the production of chemical signals that cause these symptoms. It is designated as an analgesic and anti-inflammatory agent. This indicates that the medicine serves to lessen swelling, mitigate associated pain (analgesic effect), and assists in lowering an elevated body temperature (antipyretic effect). Its role is therefore defined as a comprehensive agent for managing the key discomforts that arise from inflammatory conditions.

What side effects are possible with Metindol?

Metindol, containing the Nonsteroidal Anti-inflammatory Drug (NSAID) Indometacin, is associated with a range of formally documented adverse reactions and systemic safety warnings. The official regulatory safety profile is structured to emphasize serious risks linked to the entire NSAID class.

Serious Systemic Safety Concerns

The medication carries warnings regarding the potential for Serious Cardiovascular Thrombotic Events, including Myocardial Infarction and Stroke, which can be fatal. This risk may occur early in treatment and generally increases with the duration of use. A second major risk involves Serious Gastrointestinal Adverse Events, such as bleeding, ulceration, and perforation of the stomach or intestines, which may occur at any time during therapy and are also associated with longer-term use.

Officially Documented Adverse Reactions

Adverse reactions are classified by their documented frequency. Among the Most Common effects, typically defined as having an incidence of ge 3%, are Headache, Dizziness, Dyspepsia (indigestion), and Nausea. Other reactions may involve the Gastrointestinal system (e.g., abdominal pain, constipation, vomiting), the Nervous System (e.g., confusion, depression, listlessness), and the Cardiovascular system (e.g., fluid retention, hypertension).

Population-Specific Safety and Limitations

Specific safety considerations exist for certain groups. Older adults are at an increased risk for serious gastrointestinal events. The medicine is explicitly avoided starting at 30 weeks gestation due to the potential risk of premature closure of the fetal ductus arteriosus. Furthermore, Indometacin is formally contraindicated for the treatment of pain following Coronary Artery Bypass Graft (CABG) surgery.

Overdose and Emergency Response

Overdose and When to Seek Help

The official regulatory documentation identifies specific clinical signs and required actions when an overdose of Metindol (Indometacin) is suspected. Overdose manifestations commonly affect the gastrointestinal and central nervous systems, including severe headache, nausea, vomiting, dizziness, and mental confusion or disorientation. More severe presentations may involve restlessness, agitation, and the potential for seizures. Gastrointestinal bleeding and changes in blood pressure or heart rate are also officially documented.

Immediate Medical Attention is Required

Any suspected ingestion exceeding the prescribed dose or the appearance of acute overdose symptoms mandates that a person seek immediate medical attention and contact emergency services or a poison control center without delay. Regulatory authorities identify severe outcomes such as acute renal failure, liver damage, coma, and life-threatening gastrointestinal perforation as possible complications of a large overdose.

Management procedures are primarily symptomatic and supportive, as no specific antidote is known for Indometacin. Procedures may involve gastric lavage or the administration of activated charcoal in the early stages, followed by close monitoring of vital signs in a hospital setting. Regulatory warnings note an increased risk of severe adverse effects in the elderly and in patients with pre-existing renal or hepatic impairment.

Therapeutic Uses of Metindol

What Metindol Treats: Main Uses and Benefits

Metindol (Indometacin) is a nonsteroidal anti-inflammatory drug (NSAID) whose therapeutic role is associated with its use in managing symptoms related to inflammatory or irritative states across several clinical domains.

The medication is commonly used across conditions presenting with systemic or localized discomfort, and is considered relevant for the supportive management of chronic conditions such as Rheumatoid Arthritis, Osteoarthritis, and Ankylosing Spondylitis. It is also applied during acute, disruptive episodes, including Acute Gouty Arthritis flares and inflammation linked to bursitis or tendinitis. Furthermore, it plays a role in managing symptoms of certain specific Indomethacin-responsive headache disorders.

Applied across domains where additional symptomatic support is needed, Metindol helps address clusters of symptoms like joint swelling, tenderness, and stiffness. It is relevant in contexts involving heightened systemic burden, helping to ease the overall symptom burden. This approach provides supportive relief when symptoms interfere with routine activities, and may assist with maintaining a sense of stability when symptoms are more noticeable.

“The application of this medication may assist with maintaining a sense of stability when symptoms are more noticeable during difficult episodes of heightened symptoms.”


Quick Fact: Symptom Management for Inflammatory Pain

Metindol is considered relevant in clinical settings that involve acute or unstable symptom patterns, and helps address symptom clusters that may become intense or disruptive in chronic joint conditions.

Eligibility and Restrictions for Use

Population Eligibility for Metindol (Indometacin)

Official regulatory documents strictly define the patient populations eligible for Metindol (Indometacin) use. The drug is primarily approved for adults and adolescents 15 years of age and older. Use for oral and rectal forms is not established in children younger than 14 years.

Absolute Contraindications

Metindol must not be used in individuals with a known hypersensitivity to indometacin or who have experienced asthma, urticaria, or allergic reactions after taking aspirin or other NSAIDs. It is strictly contraindicated for patients undergoing Coronary Artery Bypass Graft (CABG) surgery and in women during the third trimester of pregnancy (30 weeks gestation and later).

Restrictions and Required Caution

Use is generally avoided in patients with severe co-morbidities, including severe heart failure and advanced renal disease. Elderly patients require caution due to an increased risk of serious adverse reactions, and those with a history of gastrointestinal ulceration or bleeding are at greater risk for serious events. Furthermore, the drug is not recommended for women who are breastfeeding or those attempting to conceive.

What should I know about interactions with other medicines?

Interactions with other medicines and products

Metindol (Indometacin) interacts with several medicine classes primarily through effects on drug concentration and additive risks to certain body systems, as documented in official regulatory prescribing information.


Contraindicated Combinations and Restrictions

Co-administration is generally not recommended with other Nonsteroidal Anti-inflammatory Drugs (NSAIDs) or with analgesic doses of Aspirin. Metindol is contraindicated for the treatment of peri-operative pain in the setting of Coronary Artery Bypass Graft (CABG) surgery.

Pharmacodynamic Interactions

Interacting Substance/Class Official Documented Interaction Pattern
Anticoagulants (e.g., Warfarin) Increased risk of serious bleeding events.
ACE Inhibitors/ARBs/Beta-Blockers May diminish the antihypertensive effect of these drugs.
Diuretics (e.g., Furosemide, Thiazides) Can reduce the natriuretic and antihypertensive effect of the diuretic.

Exposure-Modifying Interactions

Indometacin can officially increase the serum concentration of several key medications, including Lithium, Digoxin, and Methotrexate, which may necessitate close monitoring of their plasma levels. Conversely, the chronic concurrent use of Aspirin in high doses may decrease Indometacin blood levels.

Population and Product Notes

The label lists alcohol use as a factor that increases the risk of gastrointestinal bleeding when combined with the medicine. Furthermore, in elderly or renally impaired patients, co-administration with ACE Inhibitors or ARBs may result in deterioration of renal function.

Mechanism of Action

The core action of Indometacin (Metindol) is defined by its influence on specific molecular targets and signaling pathways, resulting in alterations to specific physiological pathways.

Modulating Prostanoid Synthesis and Inflammation

Indometacin engages its primary mechanism by non-selectively inhibiting the Cyclooxygenase (COX) enzymes ( COX-1 and COX-2). This action halts the cellular production of prostaglandins and other lipid mediators that are involved in inflammatory signaling. The mechanistic consequence is the suppression of mediator-induced nociceptive signaling and modulation of vascular permeability.

Unique Central and Vascular Pathway Modulation

Beyond the typical NSAID mechanism, Indometacin acts centrally to suppress prostaglandin activity in the hypothalamus, which resets the body's elevated temperature set point. This action is complemented by its ability to modulate nitric oxide ( NO) signaling, inducing specific vasoconstriction in cerebral blood vessels, and potentially engaging non-COX pathways like the CB1 receptor to influence central responses.

Dosage and Administration Information

Official Administration Guidelines for Metindol (Indomethacin)

This section outlines the methods and instructions for using indomethacin.

Administration Scope Official Instructions
Route of Administration Oral (capsules, suspension), Rectal (suppositories), Intravenous (IV, typically for neonates).
Timing in Relation to Meals Oral formulations must be taken with food, immediately after meals, or with antacids to minimize potential adverse effects.
Capsule Handling Immediate-release and extended-release capsules must be swallowed whole. Do not crush, chew, or open the capsules.
Suspension Preparation The oral suspension must be shaken well before each measured dose.

Standard Dosage and Frequency

Indomethacin should be administered using the lowest effective dosage for the shortest duration consistent with individual treatment goals.

  • Initial Dose: For conditions like osteoarthritis and rheumatoid arthritis, the starting dose is typically 25 mg two or three times a day.
  • Dose Adjustment: The daily dosage may be increased by 25 mg or 50 mg at weekly intervals until a satisfactory response is achieved or a maximum is reached. The total daily dose must not exceed 200 mg.
  • Acute Gouty Arthritis: The labeled dose is generally 50 mg three times a day, with the dose rapidly reduced to cessation once the pain is tolerable.
  • Bedtime Dosing: A large portion of the total daily dose, up to a maximum of 100 mg, may be taken at bedtime to help relieve persistent night pain or morning stiffness.

Age-Specific Rules

Elderly patients require the lowest effective dose for the shortest duration and close monitoring due to increased risk of adverse reactions.

Recent Clinical Evidence

Metindol: Overview of Clinical Evidence


Evidence for Chronic Inflammatory Joint Conditions

Research examining Metindol for conditions associated with Rheumatoid Arthritis, Osteoarthritis, and Ankylosing Spondylitis relies primarily on Randomized Controlled Trials (RCTs) and meta-analyses involving adult populations. These studies evaluate measures of symptomatic outcome, such as changes in pain intensity, the number of tender and swollen joints, and functional measures like stiffness. Studies monitored measurements of change in these indices during short-term periods, contributing to the understanding of symptom patterns. A key limitation is that the evidence focuses on symptomatic relief endpoints rather than disease modification.


Evidence for Acute Painful and Inflammatory Episodes

The evidence for treating Acute Gouty Arthritis flares and soft tissue inflammation (e.g., bursitis) comes from short-term, randomized comparative trials. These studies explored research scenarios involving periods of heightened symptom activity, examining outcomes describing acute changes, such as the time required to measure symptomatic change and reduction in localized signs of inflammation. Studies observed findings over defined, short time intervals. Due to the nature of the condition, trials are necessarily of short duration, meaning long-term effects are not fully established.


Evidence Gaps and Research Uncertainty

The evidence base for Metindol has several remaining gaps. Evidence for specific Indometacin-responsive headache disorders is characterized by smaller Case Series and diagnostic trials, resulting in modest sample sizes and limited long-term follow-up for maintenance use. For chronic conditions, while some retrospective observational studies track outcomes over extended periods, highly controlled trials providing long-term data are limited. Furthermore, specific data for certain groups, such as children (pediatric populations), remain insufficient, and studies for older adults have observed different outcome patterns. The follow-up durations in many pivotal short-term RCTs mean that long-term effects are not fully established by the highest quality evidence.

Key Studies & References

  1. Indomethacin Product Monograph (Health Canada/Regulatory Agency Document)
  2. Indometacin sensitive headache guidance (NHS Scotland Clinical Guideline)

Frequently Asked Questions (FAQ)

Common questions about Metindol (FAQ)

Q: In what specific conditions is Metindol officially indicated for use?

A: Official regulatory documents state that Metindol is primarily indicated for providing symptomatic relief from moderate-to-severe pain, inflammation, and stiffness. This includes use for chronic conditions like rheumatoid arthritis and osteoarthritis, as well as acute flares such as gouty arthritis.

Q: Is Metindol use generally considered safe for older adults according to regulatory warnings like the Beers Criteria?

A: Official information indicates that older adults are generally at a greater risk for experiencing serious side effects, especially gastrointestinal bleeding and kidney problems. Due to this increased risk, labeling advises utilizing the lowest effective dose for the shortest possible duration, and close monitoring is often referenced in official documentation for this patient population.

Q: Is Metindol contraindicated for people with severe kidney or liver disease?

A: The medication is generally avoided in patients with advanced renal disease (severe kidney impairment) because of the risk of renal function deterioration. Some international regulatory labels also specify severe hepatic impairment (liver disease) as a condition where use is restricted or formally contraindicated.

Q: Why is Metindol sometimes used for conditions that are not primarily pain or inflammation?

A: The mechanism of action involves more than just affecting inflammation throughout the body. Regulatory pharmacology documents note that it modulates prostaglandin activity in the hypothalamus, which supports its antipyretic (fever-lowering) effect. It also causes vasoconstriction in cerebral blood vessels, supporting its use in certain headache disorders.

Q: What is the significance of the 'Retard' (extended-release) formulation of Metindol?

A: Extended-release formulations are designed to be absorbed more slowly than immediate-release forms, resulting in lower peak concentrations in the blood. This is designed to support less frequent dosing and may be used to help relieve persistent night pain or morning stiffness.

Q: Are there different restrictions for Metindol depending on the route of administration (e.g., oral vs. suppository)?

A: While oral and rectal (suppository) forms share most contraindications, the intravenous (IV) route, which is typically used for infants, has specific additional restrictions. These include warnings against use in cases of proven or suspected necrotizing enterocolitis or significant kidney impairment in that population.

Q: Does Metindol have the potential to cause psychological side effects like confusion or psychosis?

A: The medication has been associated with side effects affecting the central nervous system, including confusion and depression. Although less common, severe psychiatric disturbances, such as hallucinations, have also been noted in documentation from regulatory sources.

Q: What are the signs of potential kidney problems that patients should be aware of when using Metindol?

A: Regulatory patient information describes several signs that may suggest a potential kidney problem. These include a noticeable change in the amount of urine a person passes, swelling of the feet or ankles, or sudden weight gain due to fluid retention.

Q: Is fatigue or drowsiness a known side effect listed for Metindol?

A: Official regulatory data on adverse effects includes sleepiness, drowsiness, and extreme fatigue as reported side effects. These effects relate to the medication's influence on the central nervous system.

Q: Is regular lab monitoring, such as blood tests, often recommended for patients on Metindol long-term?

A: Yes. For patients on long-term therapy, monitoring for signs of anemia (hematologic toxicity) and monitoring of renal function is a documented recommendation, particularly in high-risk patients.

Q: How quickly does Metindol typically begin to show its intended effects?

A: Pharmacokinetic data indicates that the onset of action for the immediate-release oral capsules typically begins around 30 minutes after taking the dose. The peak plasma concentrations, meaning the time when the drug concentration in the body is highest, are generally reached within one to two hours.

Q: Does Metindol interact with herbal supplements or common vitamins?

A: The official label details numerous drug-to-drug and alcohol interactions. While specific herbs or vitamins may not be listed in the primary data, general patient counseling information suggests interactions can occur with various supplements and herbs, and such potential interactions should be reviewed with a healthcare provider.

Q: What should a patient do if they notice changes in their vision while taking Metindol?

A: Official regulatory documents indicate that if blurred vision, difficulty reading, or any other change in vision occurs, the drug may need to be stopped immediately, and the patient’s eyes checked by an ophthalmologist.

Q: How does Metindol affect a patient who is taking medication for diabetes?

A: Regulatory-based drug interaction information advises that NSAIDs, like Indomethacin, may increase the risk of lactic acidosis (a serious condition) associated with the diabetes drug Metformin. For combined use, monitoring of renal function is frequently noted in guidelines.

Q: What are the general expectations for the duration of action after taking Metindol?

A: For conventional oral formulations, the duration of action is generally considered to be four to six hours. Pharmacokinetic data indicates the biological half-life, which is the time it takes for the drug concentration to reduce by half, typically ranges from five to ten hours in adults.

Q: What is the risk of developing a serious skin reaction like SJS/TEN while using Metindol?

A: Official product information carries a warning about the potential for serious skin reactions, including life-threatening conditions like Stevens-Johnson Syndrome (SJS) and Toxic Epidermal Necrolysis (TEN). Official guidance indicates that the drug should be stopped immediately if a rash first appears.

Q: Can Metindol be used by patients with a history of high cholesterol?

A: Official regulatory warnings note that patients who have risk factors for heart disease, which includes high cholesterol, may have a potentially greater risk of serious cardiovascular events. The management of the drug's use in this population is typically determined by a healthcare professional.

Q: How does Metindol use affect patients who are smokers?

A: Regulatory sources list tobacco use as a factor that may interact with the oral capsule formulation. Smoking is also recognized as a risk factor for heart disease, which may amplify the overall risk of serious cardiovascular events associated with the medication.

Q: What is the official advice on discontinuing Metindol use?

A: Regulatory documents indicate that the drug should be stopped in the event of severe adverse reactions. For minor adverse effects, the dosage may be reduced. Any decision regarding discontinuation or dosage changes is typically guided by a healthcare professional.

How should Metindol be stored and disposed of?

How to Store and Dispose of Metindol

Metindol (Indomethacin) must be stored and disposed of according to official regulatory labeling to ensure product stability and safety. The medication is required to be stored at Controlled Room Temperature, defined as 20 C to 25 C (68 F to 77 F). The container must be kept tightly closed and in its original packaging to protect the contents from moisture. Liquid formulations are explicitly restricted from being frozen.

Child Safety and Disposal

The medicine must be stored strictly out of the sight and reach of children. For disposal, unused or expired Metindol should be taken to an official drug take-back program. If no program is available, the product must be mixed with an unappealing substance, placed in a sealed container, and discarded in the household trash. The medication should not be disposed of into any wastewater system.

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

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