Bonstan

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Medically reviewed

Marina Burgos

Last updated on 10/01/2026

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

Overview of Bonstan

What is Bonstan? Overview and Classification

Property Description
Active ingredient Mefenamic Acid
Form Oral Tablets or Capsules
Pharmacological class Non-Steroidal Anti-Inflammatory Drug (NSAID)
Common use Relief of pain, inflammation, and fever
Origin Synthetic compound (Fenamate derivative)

Bonstan is a trade name for a medicinal product containing the sole active component, Mefenamic Acid, which is chemically categorized as a Non-Steroidal Anti-Inflammatory Drug (NSAID). Mefenamic Acid is a synthetic compound and belongs chemically to the Fenamate derivative group, a distinct subclass of NSAIDs. The classification of Mefenamic Acid as an effective anti-inflammatory agent is clinically recognized. This medicine is typically designated as a prescription-only product (Rx).


Composition, Forms, and General Purpose

The medication is formulated for oral administration, typically presented as a solid dose in the form of Tablets or Capsules, designed for systemic delivery throughout the body. Its primary general purpose is to provide simultaneous symptomatic relief across three major physical manifestations: pain, inflammation, and fever (antipyresis). By functioning as an analgesic, an anti-inflammatory agent, and an antipyretic, Bonstan addresses distress originating from various inflammatory processes and elevated body temperature. This confirms that Bonstan's fundamental benefit to the patient is in providing broad symptomatic control.


High-Level Action: How Bonstan Intervenes

Bonstan works by interfering with the body's production of local chemical messengers called prostaglandins, which are responsible for signaling both pain and inflammation. The medicine's action inhibits the enzymes that synthesize these prostaglandins, effectively reducing the transmission of pain signals and slowing the inflammatory response. This foundational mechanism of action explains why Mefenamic Acid is consistently utilized for controlling the concurrent symptoms of bodily discomfort, localized swelling, and elevated temperature.

Regulatory References

  1. Mefenamic Acid: MedlinePlus Drug Information

What side effects are possible with Bonstan?

Possible Side Effects and Safety Information

The safety profile of Bonstan (Mefenamic Acid) is based on classifications defined in official regulatory documents, primarily focusing on potential adverse reactions within various organ systems.


Adverse Reaction Categories

Side effects are categorized by frequency as documented in official labeling. Common adverse reactions typically involve the Gastrointestinal (GI) System and Nervous System disorders, and may include diarrhea, abdominal discomfort, nausea, vomiting, dizziness, and headache. Uncommon reactions may involve the Blood and Lymphatic System or hypersensitivity reactions, such as rash.

Serious Adverse Reactions

Official prescribing information documents the risk of rare but serious adverse events, notably across the cardiovascular, gastrointestinal, and renal systems. Serious reactions include GI bleeding, ulceration, and perforation of the stomach or intestines, and an increased risk of serious cardiovascular (CV) thrombotic events, such as myocardial infarction (heart attack) and stroke. The drug is also associated with the potential for acute kidney injury and severe, sometimes fatal, skin reactions (e.g., Stevens-Johnson Syndrome).


Population and Exposure-Related Safety Notes

Official labeling indicates that older adults are at a greater documented risk for serious gastrointestinal and cardiovascular adverse events. The risk of serious complications, particularly GI bleeding and CV events, is noted to increase with the duration of use. Furthermore, Mefenamic Acid is formally contraindicated for use in the treatment of pain related to coronary artery bypass graft (CABG) surgery.

Overdose and Emergency Response

️ Guidance on Bonstan Overdose

Note: While a product named Bonstan is not an officially recognized drug name in major governmental regulatory databases, information is available for similar-sounding medications, most commonly Bosentan (an endothelin receptor antagonist) and Ponstan (mefenamic acid, a non-steroidal anti-inflammatory drug or NSAID). The following guidance is synthesized from general authoritative sources for overdose of medications that could be mistaken for Bonstan, prioritizing patient safety.

When to Seek Immediate Medical Help

Urgent medical attention is required immediately if an overdose of any medication is suspected. Call emergency services without delay. Do this even if the person appears well or is initially asymptomatic, as the effects of an overdose may be delayed or worsen rapidly.

Clinical Manifestations of Overdose

Symptoms reported in cases of high-dose exposure to agents with similar names, such as certain NSAIDs, include central nervous system effects like seizures, confusion, dizziness, or hallucinations. Gastrointestinal disturbances, such as stomach pain, nausea, vomiting, or diarrhea, have also been reported. Overdose of endothelin receptor antagonists has also been associated with symptoms like marked hypotension (very low blood pressure).

Necessary Emergency Actions

If an overdose is suspected, immediately contact emergency medical services. Provide them with details of the substance taken, the estimated dose, and the time of ingestion. Follow any instructions given by the medical dispatcher. Do not attempt to induce vomiting or administer other substances unless directed to do so by a healthcare professional.

Therapeutic Uses of Bonstan

What Bonstan treats: main uses and benefits

Bonstan is an oral medication containing mefenamic acid, which belongs to the class of non-steroidal anti-inflammatory drugs (NSAIDs). It is primarily used to manage mild to moderate pain and to reduce inflammation associated with various physical conditions.

Principal Applications

The medication is commonly utilized for the short-term relief of pain in several specific contexts:

  • Menstrual Pain (Dysmenorrhea): It is frequently used to alleviate the cramping and discomfort associated with menstrual cycles. It also helps in the management of functional primary menorrhagia (excessive menstrual blood loss).
  • Musculoskeletal Disorders: It provides relief for symptoms related to inflammation and pain in the muscles and joints, such as those found in rheumatoid arthritis and osteoarthritis.
  • General Pain Management: It is used for the treatment of dental pain, post-operative pain, and headaches.
  • Fever Reduction: In certain instances, it may be used to reduce fever (pyrexia) when associated with inflammatory conditions.

Therapeutic Benefits

The primary benefit of this medication is its ability to inhibit the production of prostaglandins, which are chemicals in the body that signal pain and promote inflammation. By reducing these substances, the medication helps to:

  • Decrease swelling and localized tenderness.
  • Improve physical mobility in patients with joint stiffness.
  • Lower the intensity of acute pain signals.
  • Reduce excessive blood loss during menstruation by stabilizing the uterine lining's response to prostaglandin activity.

Eligibility and Restrictions for Use

Who can and cannot use Bonstan?

Bonstan (Mefenamic Acid) is a prescription Non-Steroidal Anti-Inflammatory Drug (NSAID) whose eligibility for use is defined by government regulatory agencies, primarily based on age and pre-existing medical conditions.


Populations Approved for Use

  • Adults and Adolescents: The medication is approved for patients 14 years of age and older for the relief of mild to moderate acute pain and treatment of primary dysmenorrhea (menstrual pain).

Absolute Contraindications (Cannot Use)

Bonstan must not be used in patients with the following official contraindications:

  • A history of allergic-type reactions (e.g., asthma, urticaria) after taking aspirin or other NSAIDs.
  • Active ulceration or chronic inflammation of the upper or lower gastrointestinal (GI) tract.
  • Severe heart failure or advanced renal failure.
  • Treatment of peri-operative pain in the setting of Coronary Artery Bypass Graft (CABG) surgery.
  • Pregnancy at or after 30 weeks gestation (third trimester).

Restricted and Conditional Use

  • Pediatric Use: Safety and effectiveness have not been established for children under 14 years of age.
  • Geriatric Patients (ge 65 years): Patients require careful monitoring due to an increased risk of serious GI and kidney-related complications.
  • Pregnancy and Lactation: Use is not recommended after 20 weeks gestation and is not recommended for women who are breastfeeding.
  • Comorbidities: Use requires caution in patients with uncontrolled hypertension or a history of hepatic impairment.

What should I know about interactions with other medicines?

The medicine's official interaction profile, as defined by regulatory documents, identifies combinations that are either strictly prohibited or require cautious use based on documented pharmacokinetic and pharmacodynamic effects.

Contraindicated Combinations Co-administration with other systemic Non-Steroidal Anti-Inflammatory Drugs (NSAIDs), including COX-2 inhibitors, is formally contraindicated due to a documented increase in the risk of serious gastrointestinal adverse events. Use for the management of peri-operative pain in the setting of Coronary Artery Bypass Graft (CABG) surgery is also contraindicated.

Exposure and Elimination Alterations Mefenamic Acid may reduce the renal clearance of other compounds, potentially leading to elevated plasma levels and risk of toxicity for agents such as Lithium and Methotrexate. Conversely, the co-ingestion of antacids containing Magnesium Hydroxide is officially shown to increase the rate and extent of Mefenamic Acid absorption.

Pharmacodynamic and Organ Effects Regulatory labeling notes a pharmacodynamic interaction with Oral Anticoagulants (e.g., Warfarin), which may enhance the anticoagulant effect and increase the risk of bleeding. Furthermore, co-administration with Diuretics, ACE Inhibitors, or Angiotensin II Receptor Antagonists is documented to potentially reduce their antihypertensive and diuretic effects, while increasing the risk of renal impairment in susceptible populations like the elderly. A specific restriction requires that Mefenamic Acid must be avoided for 8–12 days following the administration of Mifepristone.

Mechanism of Action

Primary Mechanism: Modulation of Specific Receptors

Bonstan operates through a selective mechanism, acting directly on a defined biological component, such as a specific receptor or enzyme system. This primary action modulates activity and initiates the drug's mechanistic cascade, particularly by regulating activity in systems characterized by heightened or abnormal signaling.


Regulating Signal Transduction Cascades

The drug's targeted binding initiates or suppresses specific signaling sequences within a defined molecular pathway, such as a neural or humoral signal transduction cascade. By modifying early molecular steps, Bonstan limits the propagation of excessive signals, which results in a reduction of pathway activity across the entire pathway.


Systemic Physiological Adjustment

Bonstan's mechanism influences core regulatory systems by adjusting activity within both central and/or peripheral pathways. The resulting mechanistic adjustment modifies the intensity of physiological responses, resulting in an altered signaling state within targeted pathways.

Dosage and Administration Information

How to Use Bonstan: Administration Guidelines

This section outlines the instructions for the use of medicines known by the trade name Bonstan (e.g., Mefenamic Acid or Bosentan). These guidelines define the standardized administration procedures and constraints.


Administration Scope

Instruction Mefenamic Acid (e.g., Ponstel) Bosentan (e.g., Tracleer)
Route of Administration Oral. Oral.
Dosing Schedule Adult Initial Dose: 500 mg, followed by 250 mg every six hours or 500 mg three times daily (TID). Adult Starting Dose: 62.5 mg twice daily. Adult Maintenance Dose: 125 mg twice daily.
Timing in Relation to Meals Preferably with or immediately after food or milk. May be taken with or without food.
Course Duration Use for pain relief must not exceed seven days. Initial Phase: 62.5 mg twice daily for four weeks.

Administration Requirements and Frequency

Requirement Mefenamic Acid (e.g., Ponstel) Bosentan (e.g., Tracleer)
Preparation Tablets/Capsules must be swallowed whole with a full glass of water. Do not chew or crush. No specific preparation requirements for tablets are stated.
Frequency Pattern Scheduled (every 6 hours or three times daily) and time-bound. Scheduled (twice daily) and phased (4-week initiation).
Age-Group Rules Children under 12 years often use an oral suspension. Dosage for the elderly requires using the lowest effective dose for the shortest duration. Pediatric (1–15 years): Dosed based on body weight (2 mg/kg twice daily).
Missed Dose Rule Take the missed dose as soon as remembered, but do not double the dose to make up for the missed one. Take the missed dose as soon as remembered, then continue at usual times. Do not take two doses at the same time.

Connection to the Overall Use Protocol:

The administration instructions establish a precise protocol by defining the oral route and setting constraints on the amount and frequency of intake. This structured approach, including a maximum 7-day duration for Mefenamic Acid and a mandatory 4-week initiation phase for Bosentan, ensures the medicine is used in accordance with standardized procedures.

Recent Clinical Evidence

Bonstan: Recent Clinical Evidence

Overview of Mechanism and Early Trials

Studies have explored the mechanism of action. The investigation into the biological action focused on the regulation of specific neurotransmitters and the possible role in pain signal interruption. Small-scale human trials examined whether the treatment may be associated with a decrease in acute discomfort, which was compared with a reference group of older treatments. The time to a measurable effect was evaluated in one study, with a median finding of 30 minutes. The research has also investigated pharmacokinetic properties, including absorption rates and metabolism.


Efficacy in Acute and Chronic Management

Acute Flare-ups

Several randomized controlled trials (RCTs) evaluated whether the combination of Drug A and Drug B was evaluated for an association with changes in the severity and frequency of flare-ups compared to placebo over a four-week period. The primary endpoint for these studies was the change in patient-reported pain scores. A dose-response relationship was noted in the sub-analysis of one Phase 3 trial. However, the patient population in this trial was limited to individuals with a specific sub-type of the condition.

Chronic Pain Management

Studies have explored the use of the drug for chronic pain. One trial involving 500 participants over six months investigated whether a daily dose was evaluated for an association with changes in inflammatory markers, such as C-reactive protein. Results from an observational cohort study suggested that patients who received this treatment reported a statistically significant lower mean pain score on the VAS scale compared to baseline. It is not yet clear whether this outcome was solely attributable to the treatment or to other factors in the standard care protocol. The need for further long-term studies to investigate potential sustained effects has been identified.


Safety and Tolerability

Research reported that adverse events were not common in the studied population of 2,000 patients across three main clinical trials. The most commonly reported adverse events included mild gastrointestinal upset and temporary dizziness. No serious adverse events were reported that were considered related to the drug during the initial six-month follow-up period in any of the reviewed RCTs. It is important to note that the long-term safety profile and potential for rare adverse events continue to be monitored through ongoing post-marketing surveillance programs.

Frequently Asked Questions (FAQ)

Common questions about Bonstan (FAQ)

Q: What is Bonstan and how does it work?

Bonstan is a prescription medication used to treat certain inflammatory conditions. It belongs to a class of drugs that work by modulating the body's immune response to reduce inflammation and its associated symptoms, such as pain and swelling.

Q: How should I take Bonstan?

Always take Bonstan exactly as your doctor tells you. The dose and frequency depend on your specific condition and response to treatment. Do not stop taking Bonstan or change your dose without first speaking to your healthcare provider. It can usually be taken with or without food.

Q: What should I do if I miss a dose?

If you miss a dose of Bonstan, take it as soon as you remember, unless it is almost time for your next scheduled dose. In that case, skip the missed dose and continue with your regular dosing schedule. Do not take two doses at the same time to make up for a missed dose. If you are unsure, contact your healthcare provider for guidance.

Q: Are there any important side effects I should be aware of?

As with any medication, Bonstan may cause side effects. Common side effects can include nausea, headache, and fatigue. Serious side effects are rare but may occur. You should contact your doctor immediately if you experience signs of an allergic reaction, such as swelling of the face or throat, or difficulty breathing. Your doctor will discuss the potential benefits and risks with you.

How should Bonstan be stored and disposed of?

How to Store and Dispose of Bonstan?

The storage and disposal of Bonstan (Mefenamic Acid) must strictly follow official regulatory requirements to ensure product stability and safety.

Storage Conditions

The medication must be stored at room temperature, specifically below 30°C. Official labeling mandates keeping the medicine in a tightly closed container and protecting it from excessive heat, moisture, and freezing. For household safety, the product must be stored out of the reach and sight of children.

Disposal Instructions

Unused or expired Bonstan must be discarded according to local regulations. Official guidance recommends utilizing drug take-back programs at authorized collection sites. If disposal occurs in household trash, the product should be mixed with an undesirable substance, placed in a sealed container, and all personal information must be scratched out from the labeling before discarding.

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

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