Painstop

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Painstop

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Medically reviewed

Rosario Oropesa

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 Painstop

What is Painstop? Identity and Classification

Property Description
Active ingredient Diclofenac and Mefenamic Acid
Form Oral dosage form (e.g., capsule or tablet)
Pharmacological class Nonsteroidal Anti-Inflammatory Drug (NSAID)
Common use Relief of mild to moderate pain and inflammation
Origin Synthetic compound

Painstop is a specialized, synthetic combination product that belongs to the Nonsteroidal Anti-Inflammatory Drug (NSAID) class of medicines. It is manufactured as an oral dosage form, typically a capsule or tablet, designed for systemic absorption through the oral route of administration. This pharmaceutical entity is defined by its dual composition, which is recognized for its analgesic and anti-inflammatory properties, representing a comprehensive approach to managing pain.

Composition: The Dual-NSAID Foundation

The foundation of Painstop lies in the combination of two distinct active ingredients: Diclofenac and Mefenamic Acid. This formulation utilizes a Phenylacetic acid derivative paired with an Anthranilic acid derivative from the Fenamate group. The two active compounds are utilized for their efficacy against pain; for instance, Diclofenac is recognized for its analgesic and anti-inflammatory properties across various conditions. The medicine helps to reduce both pain and inflammation effectively. The medicine is prepared with standard pharmaceutical excipients suitable for oral solid preparations, ensuring stability and proper delivery. This blend provides a multimodal action that integrates the properties of both constituents, distinguishing it from single-agent NSAID preparations.

General Purpose: Analgesic and Anti-Inflammatory Action

The fundamental purpose of Painstop is to act as both a systemic analgesic and an anti-inflammatory agent, simultaneously relieving pain and reducing swelling. It achieves this by working to limit the production of prostaglandins, which are chemical messengers responsible for triggering discomfort and the body's inflammatory response. Mefenamic Acid, a constituent of Painstop, functions to relieve pain by inhibiting cyclooxygenase (COX) enzymes. The medicine interrupts the chemical process causing the pain. The result is a comprehensive action that addresses mild to moderate pain while also helping to resolve inflammation and associated fever, offering general symptomatic relief typical of recovery from acute inflammatory conditions.

Regulatory References

  1. National Library of Medicine
  2. MedlinePlus Information on Mefenamic Acid

What side effects are possible with Painstop?

Possible Side Effects and Safety Information

The official safety profile for Painstop, a combination Nonsteroidal Anti-Inflammatory Drug (NSAID), is structured around several major regulatory domains concerning adverse reactions, serious risks, and population-specific considerations. All documented effects are classified by physiological system and frequency, strictly according to governmental labeling.


Adverse Reaction Classification

Most Common Effects officially documented include Gastrointestinal Disturbances, such as nausea, diarrhea, dyspepsia, and abdominal pain. Additionally, effects on the Nervous System, like headache and dizziness, are also commonly reported.

System-Organ Classes involved include the Gastrointestinal, Cardiovascular, Renal and Urinary, Hepatobiliary, and Nervous Systems. Rare but serious effects involve the Blood and Lymphatic System and the Skin (Dermatological).


Serious Adverse Reactions (Warnings)

Governmental documents highlight the potential for Serious Cardiovascular (CV) Thrombotic Events, including myocardial infarction and stroke. There is also a documented risk of Serious Gastrointestinal (GI) Adverse Events, such as ulceration, perforation, and bleeding, which may be fatal. Less common but officially noted serious risks include Severe Hepatic Reactions (liver failure) and Serious Skin Reactions (e.g., Stevens-Johnson syndrome).

Time and Duration Patterns: The risk of serious CV and GI adverse events may increase with the duration of use. Serious skin reactions are noted as potentially occurring early in the course of therapy.

Population-Specific Safety: Older adults (Geriatric Patients) face an increased risk for serious adverse reactions, especially GI bleeding. The use of this medicine is contraindicated in late pregnancy (from approximately 30 weeks gestation) due to the documented risk of premature closure of the fetal ductus arteriosus.

Safety Restrictions: Painstop is explicitly contraindicated in the setting of Coronary Artery Bypass Graft (CABG) surgery and for patients with a history of allergic-type reactions (asthma, urticaria) to aspirin or other NSAIDs.

Overdose and Emergency Response

Overdose and When to Seek Help

Painstop contains both paracetamol (acetaminophen) and codeine, and an overdose involves risks associated with both components. Prompt medical attention is essential, even if symptoms are not immediately apparent, as the severe effects of paracetamol overdose, primarily liver damage, can be delayed by several days. Codeine, an opioid, poses the most immediate life-threatening risk due to its potential to cause respiratory depression.

Symptoms of Overdose

Symptoms can vary depending on the amount taken and the individual. Early signs of a paracetamol overdose may include nausea, vomiting, and abdominal pain. Codeine overdose symptoms, which can lead to life-threatening respiratory failure, may include:

  • Slow or shallow breathing
  • Extreme drowsiness or loss of consciousness (coma)
  • Pinpoint pupils
  • Cold, clammy skin
  • Confusion

When to Seek Immediate Help

Seek emergency medical care immediately if you suspect an overdose of Painstop or any medicine containing paracetamol or codeine. Do not wait for symptoms to develop. Taking too much paracetamol can cause serious and irreversible liver failure, and codeine can cause breathing to stop, which can be fatal. Inform the medical team about the exact amount taken, when it was taken, and any other medications used. Treatment may involve specific antidotes, such as N-acetylcysteine for paracetamol and naloxone for the opioid effects of codeine.

Therapeutic Uses of Painstop

What Painstop Treats: Main Uses and Benefits

This therapeutic class is commonly indicated for symptoms related to inflammatory or irritative states, including various forms of arthritis. Painstop is applied across domains where additional symptomatic support is needed, addressing symptom clusters that may become intense or disruptive across various conditions.


Symptom Relief and Application Contexts

Painstop is commonly used across conditions characterized by episodic or fluctuating manifestations, including musculoskeletal ailments like rheumatic diseases and acute pain following trauma or minor postoperative procedures. It is relevant in clinical settings that involve acute or unstable symptom patterns, specifically addressing mild to moderate pain, swelling, stiffness, and fever. For women, it is applied to ease the distress of severe menstrual cramping (dysmenorrhea) and may assist with the management of excessive menstrual bleeding (menorrhagia).

“It is used for managing symptoms that create noticeable physiological strain, helps address the cluster of pain, swelling, and stiffness.”

This supportive relief assists with maintaining functional stability and contributes to improved comfort during periods of heightened symptoms.


Quick Fact: Relief for Inflammatory Symptoms Painstop is applied in addressing the simultaneous pain and inflammation that often characterize conditions where symptoms may intensify temporarily, providing supportive relief when symptoms interfere with routine activities.

Eligibility and Restrictions for Use

Painstop is subject to specific regulatory eligibility and non-eligibility criteria based on the official prescribing information for its active NSAID components.

Contraindicated Populations (Must Not Use)

Use is contraindicated for patients with a known hypersensitivity to the drug’s components or a history of allergic-type reactions, such as asthma or hives, triggered by aspirin or other Nonsteroidal Anti-Inflammatory Drugs (NSAIDs). The medicine is also prohibited for patients with severe heart failure, severe renal failure, active GI tract ulceration or inflammation, and is not permitted for treating pain following Coronary Artery Bypass Graft (CABG) surgery.

Age-Related and Conditional Use

Regulatory documents establish that use is not established for children under 14 years of age. Use in older adults is permitted but requires caution due to a documented increased risk of serious gastrointestinal and renal events. Eligibility is also restricted by specific cardiovascular risks, requiring use to be avoided in patients with a recent myocardial infarction (MI).

Pregnancy and Lactation Status

Painstop is contraindicated starting at 30 weeks of gestation due to the risk of premature closure of the fetal ductus arteriosus. Use is also restricted between 20 and 30 weeks of gestation. Furthermore, the medicine is not generally recommended for women who are breastfeeding.

What should I know about interactions with other medicines?

Interactions with other medicines and products

Painstop, a combination NSAID product, has officially documented interaction patterns primarily categorized by their effect on bleeding risk, metabolism, and elimination of co-administered substances, as stated in regulatory labels.

Documented Pharmacological Interactions

Interacting Substance Category Official Interaction Outcome (Regulatory Description)
Other NSAIDs/Low-Dose Aspirin Co-administration is formally contraindicated due to severe, additive risk of gastrointestinal bleeding.
Anticoagulants and SSRIs/SNRIs Increased risk of bleeding complications (Pharmacodynamic reinforcement).
Methotrexate, Lithium, Digoxin NSAIDs reduce the renal clearance of these drugs, leading to elevated plasma concentrations and potential for toxicity.
CYP2C9 Inhibitors (e.g., Fluconazole) May increase the plasma concentration of Diclofenac due to inhibited metabolism.
Diuretics and ACE Inhibitors/ARBs Reduced antihypertensive effect and increased risk of renal impairment.

Administration and Contextual Restrictions

Administration of Mefenamic Acid and substances like Cholestyramine requires temporal separation to ensure adequate absorption of Mefenamic Acid. Co-administration with alcohol increases the documented risk of gastrointestinal irritation. Caution is specifically noted in elderly patients and those with compromised renal function when co-administering with drugs that affect kidney function, due to heightened risk of interaction-related renal impairment.

Mechanism of Action

The pharmacological action of the Diclofenac/Mefenamic Acid combination involves a dual-action mechanism that interferes with the inflammatory cascade and modulates nociceptive signaling primarily at the peripheral level.

Enzyme Inhibition and Mediator Suppression

The core mechanism involves inhibiting the Cyclooxygenase (COX) enzymes responsible for converting arachidonic acid into pro-inflammatory Prostaglandins (PGE2). Diclofenac preferentially targets the inducible COX-2 isoform, while Mefenamic Acid provides broad COX inhibition. This suppression modifies the initial molecular step of the inflammatory cascade, resulting in a decreased concentration of these key mediators.

Receptor Blockade and Nociceptive Modulation

Mefenamic Acid provides a crucial, secondary mechanism by acting as a direct antagonist at Prostanoid Receptors. This action blocks the cellular signaling of prostaglandins that have already been synthesized, independently of the COX inhibition. This process directly desensitizes peripheral nociceptive (pain) nerve endings, which contributes to a reduction in excessive sensory signaling and affects thermal regulation in the central nervous system.

Complementary Target Engagement

The interaction between the two active ingredients involves multimodal engagement with the pathway: one component focuses on suppressing the production of mediators (Diclofenac/Mefenamic Acid on COX), while the other focuses on blocking the action of those mediators at the receptor level (Mefenamic Acid). This complementary strategy results in the modulation of signaling activity across the targeted pathway.

Dosage and Administration Information

How to Use Painstop: Administration Guidelines

The usage of Painstop is structured by core constraints. The medication is designated for oral administration only, typically via a capsule or tablet. The fundamental principle governing all administration is the use of the lowest effective dose for the shortest duration possible.


Administration Protocol

Category Instruction
Route Oral administration only via tablet or capsule
Timing Must be taken with food or milk to ensure proper intake
Frequency Typically scheduled for multiple times per day, often every six hours (q6h) for acute symptoms.
Preparation Dosage forms must be swallowed whole; the tablet or capsule should not be broken, crushed, or chewed.

Duration and Adjustments

Painstop is strictly limited to short-term, acute use. For general acute pain, the duration of treatment must not exceed seven days. For primary dysmenorrhea, administration is restricted to the symptomatic period, typically two to three days per cycle.

Dosing begins with an initial loading dose, followed by a lower maintenance dose. For specific populations, patients with hepatic (liver) impairment may require a reduced starting dose to align with risk minimization principles. The overall protocol requires adherence to these time-bound and dosage-limited instructions.

Recent Clinical Evidence

Research evidence / Overview of Studies for Painstop

Evidence for Use in Acute Pain and General Inflammation

The research base for the active components of Painstop was studied for conditions characterized by fluctuating or episodic manifestations, such as mild to moderate acute pain and states linked to inflammation. Research was conducted in adult populations, including settings like post-operative recovery or following injury, exploring short-term symptom changes.

The evidence is primarily drawn from short-term Randomized Controlled Trials (RCTs) and systematic reviews. Research examined outcomes related to physical discomfort, specifically measuring pain intensity using patient-reported outcomes. Studies also monitored the time it took for patients to report a specific level of change. The evidence is limited by its focus on acute treatment protocols, and research has provided limited insight into outcomes for chronic or long-lasting pain conditions.


Evidence for Use in Primary Dysmenorrhea and Menorrhagia

Research was specifically applied in studies examining patient-reported experiences of adult females with conditions such as severe menstrual cramping (primary dysmenorrhea) and excessive menstrual bleeding (menorrhagia).

Clinical trials were evaluated for their exploration of outcomes related to physiological strain associated with the menstrual cycle. Researchers monitored outcomes related to pain intensity and used standardized methods to measure menstrual blood loss across several cycles. The research describes symptom patterns in settings where symptoms may vary in intensity.


What is Still Uncertain about the Combination

While the evidence landscape for the individual active ingredients (Diclofenac and Mefenamic Acid) is extensive, comparative evidence is lacking specifically for the dual-NSAID combination product itself. There is limited research exploring how this specific combination performs head-to-head against a single-agent NSAID therapy for all outcomes related to physical discomfort. The absence of extensive comparative evidence means that certainty remains low regarding whether the dual-NSAID combination provides a different research profile compared to its constituents used alone.

Key Studies & References

  1. Mefenamic Acid Tablet, USP Label (Regulatory Overview, Indication and Study Data)

Frequently Asked Questions (FAQ)

Common questions about Painstop (FAQ)

Q: How long can the effects of Painstop be expected to last?

Official documents show the active components, Diclofenac and Mefenamic Acid, have a short elimination time in the body, typically with a half-life of two to four hours. This short elimination time is the pharmacological basis that informs the interval between doses. The effects are aligned with this duration.

Q: Is it normal to feel a certain way after taking the first dose of Painstop?

Individual responses to medication can vary. Common effects officially documented, such as nausea, abdominal discomfort, headache, or dizziness, may be experienced early in the course of therapy. Also, taking the medicine with food can affect how quickly the effect begins.

Q: Can Painstop interact with common vitamins or supplements?

Regulatory guidance advises that patients should share a complete list of all medications and supplements, including vitamins, minerals, and non-prescription products, with their healthcare professional. This is because any combination may have the potential for an interaction that could alter how Painstop works or increase the risk of side effects.

Q: Can Painstop be used by people who have high blood pressure?

Official warnings state that Nonsteroidal Anti-Inflammatory Drugs (NSAIDs) can sometimes cause new or worsening high blood pressure, and they may interfere with the effects of blood pressure medications. Regulatory practice states that patients with high blood pressure should be monitored closely while using NSAIDs.

Q: What is the difference between Painstop and a standard pain reliever?

Painstop is classified as a Nonsteroidal Anti-Inflammatory Drug (NSAID). Its composition is that of a combination product containing two active NSAID ingredients: Diclofenac and Mefenamic Acid. This combination is described as offering dual action to reduce both pain and inflammation.

Q: How long does it take for Painstop to be fully eliminated from the body?

Official information indicates that the rate at which the body clears the drug, known as the elimination half-life, is approximately two to four hours for both active components. Regulatory studies report that most of the medicine is processed by the liver and eliminated through natural excretion pathways.

Q: Can Painstop interact with herbal remedies like St. John's Wort?

Regulatory guidance strongly recommends disclosing all products being taken, including any herbal or traditional remedies. These remedies are not universally tested for drug interactions and could potentially affect the safety or effectiveness of the NSAID components in Painstop.

Q: Is Painstop available over the counter?

According to official regulatory prescribing information, Painstop (the combination of Diclofenac and Mefenamic Acid) is generally classified as a prescription-only medicine. The drug’s classification as a prescription-only medicine means a prescription is required.

Q: How quickly does Painstop generally begin to work?

Studies indicate that the concentration of the active ingredients in the blood generally reaches its peak within 2 to 4 hours after taking the capsule or tablet. While this marks the highest absorption point, the actual onset of effect can vary between individuals.

Q: Do you have to take Painstop at the same time every day?

For conditions where a continuous effect is needed, regulatory instructions describe the need to maintain stable concentrations of the medicine in the body. This continuous concentration is achieved through taking the dose around the same time each day, keeping a consistent schedule.

Q: Are there different forms or strengths of Painstop available?

Official drug labels confirm that Painstop is manufactured as an oral dosage form, typically a tablet or capsule. It is available in specific, fixed-dose combinations of the two active ingredients, which are detailed in the regulatory prescribing document.

Q: Can Painstop affect the results of certain medical tests?

The official safety profile notes that the active ingredients can potentially affect certain lab results. These include tests that monitor liver function, kidney function, and blood counts. The effect on these values is noted in regulatory information, as they are used to assess liver and kidney function.

Q: Is there any data on how Painstop affects driving or operating machinery?

Official documents note that caution is required due to the potential for side effects like dizziness, drowsiness, or visual changes that may affect these activities. Patients should therefore exercise caution before attempting to drive or operate complex machinery.

Q: Is Painstop known to cause weight changes?

Weight changes have been listed as reported adverse reactions for the active ingredients contained in Painstop. Official safety information for the components lists both weight gain and weight loss under the metabolic and nutritional system class.

Q: Can Painstop cause issues with sleeping?

According to the official safety profile, the medicine may potentially cause issues with sleep. Reported nervous system effects include insomnia (difficulty falling or staying asleep), general sleepiness, and dream abnormalities.

Q: What happens if a dose of Painstop is missed?

Regulatory guidance advises that if a dose is missed, it should be taken as soon as it is remembered. However, if it is almost time for the next scheduled dose, the patient is instructed to skip the missed dose entirely and resume the normal schedule. Regulatory guidance advises against taking a double dose.

Q: Is Painstop considered a schedule drug by government agencies?

Official classification by government drug agencies designates Painstop as a non-controlled substance. It is not considered a 'schedule drug' in regulatory terms.

Q: What should a patient do if they experience unusual effects while taking Painstop?

Official patient instructions require immediate communication with a healthcare professional if any signs of a serious adverse event or unusual symptoms are experienced. This measure is in place to ensure patient safety.

Q: Is Painstop a generic or a brand-name medicine?

The drug is available under various brand names worldwide, depending on the manufacturer and the country. The combination of its two active ingredients, Diclofenac and Mefenamic Acid, is also commonly available in generic forms.

How should Painstop be stored and disposed of?

How to Store and Dispose of Painstop?

Painstop must be stored according to regulatory requirements to ensure its stability and effectiveness until the expiry date. All instructions are based on official government labeling.


Storage Conditions

The medicine must be stored at room temperature and below 30°C.

It requires protection from environmental factors and must be kept in a dry place and protected from light. The container must be kept tightly closed and stored in its original packaging. For safety, the product must be stored out of the sight and reach of children and secured in a locked area.


Disposal Instructions

Unused or expired Painstop must be disposed of in accordance with local regulations for pharmaceutical waste. The preferred method is using official drug take-back programs. The product should not be allowed to enter sewers or surface water, and it must never be flushed down a toilet or sink.

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

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