Coligan

Quick links to important sections

Coligan

Treatment option:

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 Coligan

Coligan: Identity, Composition, and General Purpose

Property Description
Active ingredient Mefenamic Acid (INN)
Form Tablet, Capsule, Oral suspension
Pharmacological class Nonsteroidal Anti-Inflammatory Drug (NSAID)
Common purpose Relief from pain, swelling, and fever
Origin Synthetic compound

What Type of Drug is Coligan? Classification and Composition

Coligan is a pharmaceutical preparation whose sole active ingredient is Mefenamic Acid, a synthetic compound chemically categorized as an Anthranilic acid derivative. This medicine belongs to the broad and widely utilized Nonsteroidal Anti-Inflammatory Drug (NSAID) pharmacological class. As a single-ingredient product, its therapeutic effects are solely due to the action of Mefenamic Acid, which has been clinically recognized for its broad utility as an analgesic and anti-inflammatory agent.

When administered orally to achieve a systemic effect, Coligan is typically supplied in established dosage forms, including the familiar Tablet and Capsule formats, and sometimes as an Oral suspension. The classification of Mefenamic Acid as an NSAID is consistently documented by health bodies, confirming its role among general pain and inflammation relievers.


What is Coligan’s General Purpose? Pain, Swelling, and Fever Relief

The general purpose of Coligan is to provide reliable symptomatic relief by managing three common physiological responses: general pain, mild to moderate swelling, and elevated body temperature or fever. The drug achieves this through its core Mechanism of effect, which is acting as a Prostaglandin synthesis inhibitor.

This action gives the drug a multifaceted role, allowing it to deliver a demonstrable Analgesic effect (relief from pain), an Anti-inflammatory effect (reduction of swelling), and an Antipyretic action (fever reduction). This profile makes Coligan suitable for non-specific uses, such as reducing discomfort associated with general body aches.

Regulatory References

  1. Mefenamic Acid: MedlinePlus Drug Information

What side effects are possible with Coligan?

Possible Side Effects

Coligan, a combination of Colchicine and Probenecid, may cause side effects, many of which are related to the gastrointestinal system and typically diminish over time as the body adjusts to the medication. It is essential to report any persistent or worsening side effects to a healthcare provider.


Common Side Effects

The most commonly reported side effects include diarrhea, nausea, vomiting, abdominal pain or cramping, loss of appetite, headache, and dizziness.

Serious Side Effects

Contact a healthcare provider immediately if you experience signs of a serious reaction, which may include:

  • Blood disorders: Fever, sore throat, unusual bleeding or bruising, or extreme fatigue, which could indicate bone marrow suppression.
  • Allergic reactions: Hives, difficulty breathing, or swelling of the face, lips, tongue, or throat.
  • Kidney problems: Painful or difficult urination, blood in the urine, severe back or flank pain, or a sudden decrease in the amount of urine.
  • Neuromuscular toxicity: Severe muscle weakness or pain, especially with fever or dark urine.

Safety Information and Precautions

Contraindications: Coligan should generally not be used by patients with pre-existing severe kidney or liver disease, certain blood disorders (blood dyscrasias), or in the presence of an acute gout attack when starting therapy. It is also generally contraindicated for use in children under two years of age.

Drug Interactions: The effectiveness of Coligan can be reduced by taking aspirin or other salicylates. The risk of toxicity is increased when combined with certain other medications, including some antibiotics and cholesterol-lowering drugs (statins). Always inform your doctor of all prescription, over-the-counter medications, and supplements you are taking.

Special Considerations: Patients should drink plenty of fluids while taking this medication to help prevent the formation of uric acid kidney stones. Alcohol consumption should be limited or avoided, as it can worsen gout and increase the risk of side effects. This medication is generally not recommended during pregnancy or breastfeeding due to potential risks to the fetus or infant.

Overdose and Emergency Response

Overdose and When to Seek Help

Official regulatory documents define the overdose profile of Coligan (Mefenamic Acid) by outlining specific manifestations and mandated emergency actions. Overdose is primarily associated with central nervous system (CNS) and gastrointestinal effects.

Documented Overdose Manifestations

Symptoms following acute overdose are documented to include nausea, vomiting, and epigastric pain. CNS signs such as lethargy, drowsiness, headache, dizziness, confusion, and tinnitus are also reported in regulatory labeling.

Severe Regulatory-Listed Outcomes
Seizures (or Convulsions)
Acute renal failure
Coma (in severe cases)

Emergency Actions and Treatment

In all cases of suspected overdose, immediate action is required. Patients must seek immediate medical attention and contact emergency services or a Poison Control Center promptly. The regulatory profile states that no specific antidote is known for Mefenamic Acid overdose.

Management is based on symptomatic and supportive treatment. Interventions like gastric lavage and the administration of activated charcoal may be considered if performed early following ingestion. Patients require close observation and vital sign monitoring to manage the potential development of severe complications like seizures or acute renal failure.

Therapeutic Uses of Coligan

What Coligan Treats: Main Uses and Benefits

Coligan (Mefenamic Acid) is commonly used to help manage acute symptoms and physical discomfort in several key therapeutic domains. Consistent with established therapeutic profiles, the medication is relevant for easing symptoms related to mild to moderate acute pain and is commonly used for managing primary dysmenorrhea. The therapeutic profile is relevant for easing the overall symptom burden.

Key Therapeutic Applications

Eases Pain and Inflammation: Coligan is applied in settings where symptoms are related to inflammatory or irritative states, supporting general well-being during symptomatic phases where symptoms create noticeable functional strain. The medication is relevant for easing symptoms related to headaches, dental procedures, muscular strain, and joint discomfort associated with conditions like arthritis.

Menstrual Symptom Support: The medication is relevant for easing recurrent or episodic manifestations of painful periods, where functional stability becomes affected. This application supports patients during episodes of heightened discomfort during the menstrual cycle.

Antipyretic Use: Coligan is applicable within clinical settings that involve acute or disruptive symptom patterns, and generally may be part of symptomatic management for fever, particularly in the pediatric population.


Quick Fact: Relief for Acute Pain The primary benefit is providing supportive relief when symptoms interfere with routine activities, supporting general well-being during periods of heightened symptoms.

Eligibility and Restrictions for Use

Who Can and Cannot Use Coligan? (Mefenamic Acid)

This section outlines the officially documented population eligibility and non-eligibility rules for Coligan, as defined by regulatory authorities.


Contraindicated Populations

Coligan is absolutely contraindicated in patients with known hypersensitivity to Mefenamic Acid or other NSAIDs (e.g., Aspirin), active or recurrent gastrointestinal ulceration/bleeding, severe renal failure, severe hepatic failure, or severe heart failure. It must also not be used for peri-operative pain management following Coronary Artery Bypass Graft (CABG) surgery or in patients with Inflammatory Bowel Disease (IBD).


Age and Life Stage Restrictions

Population Eligibility Status (Regulatory Label)
Adults Use is approved for mild to moderate pain and primary dysmenorrhea.
Adolescents (Under 14 years) Use for pain and dysmenorrhea is not established and not recommended.
Elderly Patients Use requires caution due to a greater risk of adverse events, particularly GI bleeding.
Pregnancy (Third Trimester) Contraindicated (prohibited). Conditional use is defined for 20-30 weeks gestation.
Lactation / Fertility Not recommended for use by nursing mothers or women who are actively attempting to conceive.

Official Eligibility Statement: Eligibility is strictly limited by pre-existing conditions and life stage, with specific duration limits for approved age groups and indications.

What should I know about interactions with other medicines?

Coligan (colchicine) is a medicine with a narrow safety range, meaning small changes in its level in the body can lead to serious toxicity. Its most significant drug interactions occur with medicines that block two body mechanisms: the CYP3A4 enzyme and the P-glycoprotein (P-gp) transporter.


Critical Interactions

  • Dual Inhibitors: Co-administration of Coligan with medicines that strongly inhibit both CYP3A4 and P-gp, such as certain antifungal agents (e.g., ketoconazole, itraconazole) and antibiotics (e.g., clarithromycin), can dramatically increase Coligan levels. This combination has led to life-threatening or fatal toxicity.
  • Avoidance and Contraindication: This dual combination is contraindicated (must not be used) in patients who have kidney or liver impairment. For all other patients, co-administration should be avoided or requires careful dose reduction and monitoring by a healthcare provider.

Other Significant Interactions

  • Statins and Fibrates: Combining Coligan with cholesterol-lowering medicines like HMG-CoA reductase inhibitors (Statins) or Fibrates increases the risk of muscle damage (myopathy and rhabdomyolysis).
  • Grapefruit Juice: Consuming grapefruit or grapefruit juice should be avoided, as it is a moderate CYP3A4 inhibitor and can increase Coligan concentrations, raising the risk of side effects.

Always inform your doctor or pharmacist of all prescription and non-prescription products, including herbal supplements, vitamins, and dietary products, you are taking before starting or changing treatment with Coligan.

Mechanism of Action

Coligan exerts its physiological effects through two distinct and complementary mechanistic domains: the alteration of eicosanoid production and the stabilization of fibrin polymers.

Interference with Prostaglandin Biosynthesis

This domain involves inhibiting the Cyclooxygenase (COX-1 and COX-2) enzymes, which are critical early steps in the conversion of arachidonic acid into prostaglandins. Prostaglandins are lipid compounds that function as local biological mediators; inhibition of prostaglandin synthesis results in reduced levels of these compounds, thereby altering downstream signaling pathways.

Inhibition of Fibrinolysis

This mechanism centers on the plasminogen-plasmin system, where the component acts as an antifibrinolytic agent. By binding to lysine-binding sites on plasminogen and active plasmin, it blocks the enzyme's capacity to degrade fibrin, the structural foundation of blood clots. Binding of plasminogen and plasmin results in the preservation of fibrin structure, thereby influencing the duration of clot integrity.

Dosage and Administration Information

Coligan (Mefenamic Acid) is administered exclusively by the oral route using established dosage forms such as capsules, tablets, or oral suspension. The use of this drug is governed by principles of short-term, acute management. The fundamental rule for all administration is to use the lowest effective dose for the shortest duration necessary.

Standard Labeled Dosing Regimens (Adults)

For the primary adult indications of acute pain and primary dysmenorrhea, the dosing follows a defined, intermittent schedule:

Regimen Component Dosage and Frequency
Starting Dose 500 mg administered as a single dose.
Maintenance Dose 250 mg per dose.
Frequency Taken every 6 hours (q6hr) as needed.

Administration Constraints and Duration

The administration context requires that treatment for acute pain not exceed 7 days in total duration. When used for painful menstrual periods (primary dysmenorrhea), the treatment course is typically limited to 2 to 3 days, and administration should commence at the onset of bleeding and associated pain.

To optimize tolerance, the drug may be taken with food or milk. Regarding specific populations, guidance advises caution in older adults, necessitating the lowest effective dose, and the drug is generally not recommended for the listed indications in pediatric patients under 14 years of age.

Recent Clinical Evidence

Coligan (Generic Name: Undenatured Type II Collagen, or UC-II) is a compound that has been the focus of numerous clinical trials, primarily examining its potential application in joint health and conditions like osteoarthritis (OA). The research aims to describe the compound's impact on joint function and patient-reported pain levels.


Research Findings in Osteoarthritis

Studies have investigated Coligan's effect on knee function and pain in patients diagnosed with early OA. Several randomized controlled trials (RCTs) have compared the compound against a placebo or against other established joint supplements, such as glucosamine and chondroitin sulfate (G+C). Key research findings often focus on standardized outcome measures, including:

  • WOMAC (Western Ontario and McMaster Universities Osteoarthritis Index): This composite score assesses pain, stiffness, and physical function.
  • VAS (Visual Analogue Scale): This score is used to measure patient-reported pain intensity.

In some studies, scores on the WOMAC and VAS scales were observed to improve following Coligan administration compared to baseline measurements. Further research is necessary to substantiate these findings across larger patient populations.


Tolerability and Safety Profile

Across clinical research, Coligan has generally been found to be well tolerated by participants. The complications and reported adverse events observed in trials were similar to those reported for other nutritional supplements used in the management of OA. Due to the diverse nature of collagen products—including hydrolyzed and undenatured forms—clinical conclusions are often specific to the particular compound type and dosage tested in each study.

Key Studies & References

  1. Safety and efficacy of undenatured type II collagen in the treatment of osteoarthritis of the knee: a clinical trial (Crowley et al., 2009)
  2. Glucosamine and Chondroitin for Osteoarthritis: What You Need To Know (National Center for Complementary and Integrative Health - NIH)

Frequently Asked Questions (FAQ)

Common questions about Coligan (FAQ)


Q: How long does it usually take for Coligan to start working?

Coligan is described in regulatory documents as being rapidly absorbed after it is taken by mouth. Based on studies of how the medicine moves through the body, levels typically peak in the blood approximately 2 to 4 hours following a dose.


Q: Does Coligan interact with herbal supplements like St. John's Wort?

Official drug information advises patients to tell their healthcare provider about all prescription and non-prescription products, including herbal supplements. This disclosure allows the provider to assess the potential for unintended interactions between the drug and other substances.


Q: What if I already take a vitamin supplement with Coligan?

As a safety measure, patients should inform a healthcare provider about all products being taken, including vitamin supplements. The general principle in official guidance is to fully disclose all products before starting or changing any medication.


Q: What is the risk of a serious allergic reaction to Coligan?

Official safety warnings indicate that Coligan is contraindicated (must not be used) by anyone who has a known allergy (hypersensitivity) to Mefenamic Acid or other NSAIDs. Serious and sometimes fatal reactions, such as anaphylaxis (a severe allergic reaction), have been reported in official documents.


Q: Does Coligan interact with common cold or flu medications?

Official guidance advises patients to inform their healthcare professional of all over-the-counter (non-prescription) products, which would include common cold and flu medications. This broad disclosure helps the provider check for potential conflicts with the drug.


Q: Why is it important to tell the doctor about all other medicines when starting Coligan?

Disclosing all other medicines is critical due to the potential for serious interactions that can lead to increased toxicity. This dual combination is contraindicated for patients with severe kidney or liver impairment. The principle of full disclosure is included in official guidance because of the potential for unintended interactions.


Q: Does taking Coligan require any special monitoring or blood tests?

Official guidance states that for patients receiving long-term therapy, periodic monitoring of blood counts, kidney function, and liver function is advised. This is a measure to help evaluate a patient's response to treatment over time.


Q: How is Coligan different from a placebo in clinical trials?

In clinical trials, a placebo is an inactive substance with no pharmacological effect. Coligan, by contrast, is known to have a specific action—it inhibits the synthesis of prostaglandins, which are chemical compounds in the body involved in pain, fever, and inflammation.


Q: Is Coligan the same type of medicine as [similar drug name]?

Coligan's active ingredient, Mefenamic Acid, is chemically categorized as a Nonsteroidal Anti-Inflammatory Drug (NSAID). It is an anthranilic acid derivative, placing it within the general class of medicines used to relieve pain and reduce inflammation.


Q: Can Coligan be used for things other than its main approved uses?

Regulatory documents define Coligan as approved and indicated only for the relief of mild to moderate acute pain and the treatment of primary dysmenorrhea (painful menstrual periods). Official uses are strictly limited to these approved indications.


Q: Is it normal to feel a bit tired after taking Coligan?

Official safety documents list drowsiness or fatigue among the possible side effects associated with the medication. Any persistent or bothersome side effects are typically addressed by a healthcare provider.


Q: Are there any foods or drinks that should be avoided while using Coligan?

Official safety warnings specifically advise that consuming grapefruit or grapefruit juice should be avoided. This is because grapefruit can increase the concentration of the drug in the body, which may raise the risk of side effects.


Q: What happens if a dose of Coligan is forgotten or missed?

Official patient information outlines the recommended course of action for missed doses. This generally involves a strategy of skipping the forgotten dose rather than taking a double dose to maintain the intended schedule.


Q: Can Coligan affect my ability to drive or operate machinery?

Official warnings state that because side effects like dizziness or drowsiness may occur, patients should be aware of this potential impact. Official warnings caution that patients should take necessary precautions regarding activities like driving or operating machinery.


Q: Is Coligan an addictive medication?

Coligan's active ingredient, Mefenamic Acid, is officially classified as a non-controlled substance. It is not designated as an addictive medication under federal Controlled Substances Acts.


Q: Does Coligan cause weight gain or weight loss?

The official list of reported adverse events includes both unusual weight gain and unexplained weight loss among the possible, though less common, side effects. Sudden or significant weight change is a factor typically reviewed by a healthcare provider.


Q: Why does the packaging say Coligan is a controlled substance (if applicable)?

Coligan (Mefenamic Acid) is classified as a single-ingredient Nonsteroidal Anti-Inflammatory Drug (NSAID) and is not designated as a controlled substance under federal law in the US. If the medication is part of a combination product, its status may differ.


Q: How long does Coligan stay in the body after the last dose?

The time it takes for half of the drug to be eliminated from the body (the elimination half-life) is approximately 2 to 4 hours in adults. This figure is used by regulators to understand drug clearance.


Q: Is Coligan a long-term treatment or is it usually short-term?

Official guidance consistently states that the medicine is intended for short-term use only. For acute pain, treatment should typically not exceed 7 days in total duration.


Q: Are there different brand names for the medicine Coligan?

Yes, the active ingredient, Mefenamic Acid, is available under its generic name. It has also been marketed under various brand names in different countries, such as Ponstel or Ponstan.


Q: Is it common for people to stop taking Coligan because of side effects?

Official research reports on this class of medicine show that discontinuation of therapy is often due to either a lack of effectiveness or the occurrence of adverse events (side effects). This is a common pattern observed in clinical settings.


Q: What is the main difference between Coligan and other treatments?

Coligan is classified as an NSAID that works primarily by inhibiting the synthesis of prostaglandins. This mechanism sets it apart from non-NSAID pain relievers and other treatments that target inflammation through different pathways.


Q: Why do some patients take Coligan 'as needed' instead of daily?

Official prescribing information defines the dosing schedule for acute pain and painful menstrual periods as 'as needed' (PRN) every 6 hours. This intermittent approach is used because the drug is intended for short-term, acute symptoms rather than ongoing daily treatment.


Q: Does Coligan cause issues with sleep?

Official drug information lists sleep-related issues among the possible adverse events. These can include both drowsiness during the day and difficulty sleeping (insomnia).


Q: What is the purpose of the black box warning on Coligan (if applicable)?

The purpose of a Boxed Warning is to alert patients and providers to the most serious risks. For this medicine, warnings are required regarding the increased risks of serious cardiovascular thrombotic events (like heart attack or stroke) and serious gastrointestinal adverse events (like bleeding and ulceration).


Q: Is there a generic version of Coligan available?

Yes, the active ingredient, Mefenamic Acid, is widely available as a generic medication in many jurisdictions.


Q: What conditions make someone ineligible to use Coligan?

Ineligibility is defined by several contraindications in regulatory documents. These include severe kidney, liver, or heart failure, active gastrointestinal bleeding or ulceration, and use immediately following coronary artery bypass graft (CABG) surgery.


Q: What are the requirements for getting a prescription for Coligan?

Coligan (Mefenamic Acid) is categorized as a prescription-only medicine (Rx-only) in many jurisdictions. This means that authorization from a licensed healthcare provider is required to obtain and use the medicine.


Q: Can Coligan be taken with my blood pressure medicine?

Official documents list specific interactions and advise informing a healthcare provider of all medicines taken. This is important because medicines in this class (NSAIDs) can sometimes affect blood pressure and potentially interfere with the effectiveness of certain blood pressure medications.

How should Coligan be stored and disposed of?

How to Store and Dispose of Coligan?

Coligan (Mefenamic Acid) must be stored and disposed of according to the specific conditions outlined in official regulatory labeling to ensure its stability.

Required Storage Conditions

The product must be stored at Controlled Room Temperature, typically maintained between 20 C and 25 C (68 F and 77 F). The container must be kept tightly closed and stored in its original container to protect the medicine from moisture. It is required to avoid freezing and exposure to excessive heat. All medication must be stored out of the sight and reach of children.

Official Disposal Rules

Disposal of any unused or expired Coligan should be managed via a community-based drug take-back program where available. If a program is not accessible, the medicine can be disposed of in the household trash after mixing it with an undesirable substance, but it must not be flushed down the toilet or disposed of in wastewater systems.

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

Equivalent of Coligan found in:

A-Z Index: