Flexar

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Medically reviewed

Marina Burgos

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 Flexar

Property Description
Active ingredient Piroxicam
Form Capsule, Tablet (for oral, systemic use)
Pharmacological class Nonsteroidal Anti-inflammatory Drug (NSAID)
Common use Symptomatic relief of pain and inflammation
Origin Synthetic (oxicam chemical derivative)

What Type of Medicine is Flexar (Piroxicam)?

Flexar is a widely recognized brand name for a medication whose active component is Piroxicam, a substance formally classified as a Nonsteroidal Anti-inflammatory Drug (NSAID). This classification places Piroxicam within a core therapeutic category utilized for managing inflammation and pain throughout the body. The compound is a synthetic chemical belonging to the oxicam subclass of NSAIDs, which distinguishes it chemically as an enolic acid derivative. Piroxicam is clinically recognized for its effectiveness as an antirheumatic drug. This means the medication possesses properties that help alleviate the physical symptoms associated with chronic inflammatory disorders.


Composition and Available Drug Forms

The medicine is constructed from the active ingredient Piroxicam combined with necessary, inactive pharmaceutical excipients required for oral delivery. Piroxicam for systemic use is primarily supplied for absorption in the form of an oral capsule or tablet. The long biological half-life of Piroxicam is a key factor differentiating it from shorter-acting NSAIDs, making it suitable for managing sustained inflammatory pain.


General Benefit: What is Flexar Used to Relieve?

The general purpose of Flexar is to provide symptomatic relief by effectively mitigating inflammation, pain, and fever caused by underlying conditions. Piroxicam achieves this by acting as a non-selective Cyclooxygenase (COX) Inhibitor, a mechanism that interferes with the body’s process of creating pro-inflammatory messengers called prostaglandins. This chemical action provides its core anti-inflammatory, analgesic, and antipyretic effects, offering patients relief from physical discomfort, including swelling and stiffness.

Regulatory References

  1. Piroxicam Drug Information | MedlinePlus
  2. Piroxicam Mechanism of Action | DrugBank Online

What side effects are possible with Flexar?

Possible Side Effects and Safety Information

This information describes the documented adverse reactions and safety restrictions for Flexar, strictly based on official government regulatory documents.

Adverse Reactions Scope

Regulatory documents classify side effects based on their frequency in clinical trials, as well as by the system of the body affected. The most common adverse reactions reported (meaning they occurred in 3% or more of patients and more often than with placebo) include:

  • Nervous System Effects: Somnolence (drowsiness), Dizziness, Fatigue
  • Gastrointestinal Effects: Dry mouth, Constipation, Nausea, Dyspepsia

Serious Safety Concerns and Restrictions

Official labeling requires specific warnings for serious safety risks. Flexar is contraindicated (must not be used) in several critical situations:

  • MAO Inhibitors: Use with or within 14 days of stopping a Monoamine Oxidase (MAO) inhibitor is forbidden due to the risk of life-threatening reactions, including hyperpyretic crisis and seizures.
  • Cardiovascular Conditions: Use is contraindicated in patients with hyperthyroidism, arrhythmias, heart block or conduction disturbances, or congestive heart failure.
  • Hypersensitivity: Do not use if there is a known allergy to Flexar or any of its components.

There is also a documented risk of Serotonin Syndrome when Flexar is combined with other serotonergic medications. Due to its structural similarity to certain older medications, adverse cardiovascular effects like arrhythmias and stroke, as well as angle-closure glaucoma, are known safety risks.

Population and Duration Safety Notes

The medicine is generally not recommended for use in the elderly or in patients with moderate to severe hepatic (liver) impairment. Official labeling also advises that Flexar is typically recommended for use only for short periods (up to two or three weeks), as effectiveness beyond this duration has not been established in regulatory documentation.

Overdose and Emergency Response

Overdose and When to Seek Help

Official regulatory information for Flexar (cyclobenzaprine) overdose focuses on recognition, immediate action, and required medical management.

Documented Overdose Presentations

An overdose may present with changes in mental status, including severe drowsiness, confusion, agitation, or hallucinations. Other early signs can include tachycardia (fast heart rate) and vomiting. The overdose profile is complicated by its structural similarity to tricyclic antidepressants.

Serious and Life-Threatening Outcomes

Serious events, though rare, can be fatal. These include cardiac arrest, severe hypotension, significant arrhythmias, and seizures. The risk of Serotonin Syndrome or Neuroleptic Malignant Syndrome (NMS) is also documented, particularly with co-ingestion of other substances.

Immediate Emergency Response

Urgent medical attention is required immediately for any suspected overdose. Contact a Poison Control Center or emergency services (such as 911) at once. Do not attempt to induce vomiting. Symptomatic and supportive treatment is necessary, and continuous cardiac monitoring (ECG) is often required for an extended period due to the risk of delayed cardiac complications.

Population-Specific Considerations

The elderly population is officially documented to be at higher risk for severe overdose effects, including increased susceptibility to confusion and adverse cardiac events. Increased caution and immediate medical intervention are required for all populations, but especially for older patients and those with hepatic impairment.

Therapeutic Uses of Flexar

Flexar is a prescription medication utilized in the therapeutic domain of musculoskeletal and joint conditions. It is approved as a treatment intended to help manage symptoms associated with certain forms of arthritis.

The primary therapeutic areas where Flexar may be used include the management of pain and stiffness related to osteoarthritis and rheumatoid arthritis. It is also indicated for the relief of discomfort and limited mobility associated with ankylosing spondylitis.

By addressing the signs and symptoms of these conditions, the medication is designed to support improvements in joint function and patient comfort. It may assist in reducing localized swelling and joint tenderness. Flexar may be prescribed for short-term use in managing acute, painful musculoskeletal issues.


Quick Facts: Flexar

  • Primary Use: Management of pain and stiffness associated with certain forms of arthritis.
  • Specific Conditions: Osteoarthritis, rheumatoid arthritis, and ankylosing spondylitis.
  • Patient Benefit: Designed to support joint function and help reduce associated discomfort.

Eligibility and Restrictions for Use

Eligibility for Flexar (Piroxicam) as per Regulatory Labels

Flexar is officially approved for use in adults for the symptomatic management of certain chronic inflammatory joint conditions, such as osteoarthritis, rheumatoid arthritis, and ankylosing spondylitis. However, eligibility is strictly governed by a list of absolute contraindications and restrictions defined in regulatory documents.

Populations that Must Not Use Flexar (Contraindications)

The medicine is strictly contraindicated and must not be used by patients who have a known hypersensitivity to piroxicam or other Nonsteroidal Anti-inflammatory Drugs (NSAIDs), including a history of allergic reactions like asthma or urticaria after taking aspirin or other NSAIDs. Use is also prohibited in patients with active gastrointestinal (GI) ulceration, bleeding, or perforation, or those undergoing Coronary Artery Bypass Graft (CABG) surgery.

Restricted Populations and Conditional Use

  • Pregnancy: Flexar is contraindicated in women starting at 30 weeks gestation (the third trimester) due to the risk of fetal cardiovascular harm. Restricted use is advised between 20 and 30 weeks gestation.
  • Pediatric Use: Safety and effectiveness have not been established for children and adolescents; therefore, use is not recommended in the pediatric population.
  • Older Adults: Patients over 70 years of age require extreme caution and monitoring due to a significantly increased risk of serious GI and cardiovascular events, and avoidance may be advised for those over 80 years.
  • Comorbidities: Caution and monitoring are required for patients with pre-existing conditions like severe heart failure, uncontrolled hypertension, or impaired renal or hepatic function.

What should I know about interactions with other medicines?

Flexar Interactions with other medicines and products

Flexar (Piroxicam) has formally documented interaction patterns that influence patient safety and the exposure of co-administered agents, as defined by government regulatory authorities.

Contraindicated Combinations

Co-administration is strictly contraindicated with other systemic Nonsteroidal Anti-inflammatory Drugs (NSAIDs), including COX-2 inhibitors, due to the substantial increase in the official risk of gastrointestinal (GI) bleeding and ulceration. The combination with anticoagulants (e.g., Warfarin) is similarly prohibited due to a severe increase in the risk of hemorrhage.

Category Interacting Agents Official Interaction Risk
Hemorrhagic Risk Anticoagulants, Antiplatelet agents, Oral Corticosteroids, SSRIs/SNRIs Significantly increased risk of bleeding events (e.g., GI hemorrhage).
Exposure Modification Lithium, Methotrexate Reduced renal clearance, leading to officially increased plasma levels of the co-administered drug.

Pharmacodynamic and Pharmacokinetic Effects

Piroxicam may diminish the antihypertensive effect of agents like ACE Inhibitors and Angiotensin Receptor Blockers (ARBs), as well as reducing the efficacy of Diuretics. The drug is primarily metabolized via the CYP2C9 enzyme; co-administration with CYP2C9 inhibitors may result in increased Piroxicam systemic exposure.

Substance and Population Notes

Ingestion of alcohol is officially documented as a factor that increases the risk of serious GI bleeding. Furthermore, regulatory information notes that concomitant use with ACE-I or ARBs in elderly or volume-depleted patients may increase the risk of renal function deterioration.

Mechanism of Action

How Flexar Works: Mechanism of Action

The action of Flexar (Piroxicam) is defined by its ability to interfere with the primary molecular cascades responsible for mediating the body's inflammatory and pain responses.


Enzyme Inhibition and Eicosanoid Regulation

Flexar's core mechanism is the non-selective inhibition of the Cyclooxygenase (COX) enzymes ( COX-1 and COX-2). This action blocks the conversion of arachidonic acid into pro-inflammatory mediators known as prostaglandins, thereby inhibiting the Eicosanoid Signaling Pathway. This targeted enzyme suppression is the initial step that results in the decrease of systemic prostaglandin levels.


Modulating Nociceptive and Thermoregulatory Signals

The systemic reduction in prostaglandins, particularly PGE2, exerts influence on two separate physiological systems. Peripherally, it results in the desensitization of nociceptors (pain receptors), altering the signal-to-stimulus relationship. Centrally, the mechanism influences the hypothalamic temperature setting, adjusting the set point toward a normothermic state. These effects represent the resulting physiological changes inherent to the COX inhibition mechanism.

Dosage and Administration Information

How to Use Flexar: Official Administration Guidelines

Flexar (Piroxicam) usage is guided by specific parameters for proper administration. These guidelines describe how the medicine is used according to established protocol.


Standard Administration Scope

Feature Instruction
Route of Administration Primarily Oral (capsules or tablets). An Intramuscular (IM) injection may be an option in certain regions for the short-term initiation of treatment.
Dosing Schedule The standard adult dose for chronic conditions like osteoarthritis or rheumatoid arthritis is 20 mg once daily. The total daily intake must not exceed 20 mg for long-term use.
Frequency The drug's pharmacological profile supports a once-daily (qD) regimen. The total daily dose may, however, be administered as two smaller divided doses.
Timing in Relation to Meals Oral forms should be taken with or immediately following food to help mitigate gastrointestinal effects.

Procedural and Population Constraints

The correct use of Flexar requires attention to specific conditions:

  • Duration of Use: Due to the drug’s long half-life, a steady-state blood level takes several days to achieve. The full therapeutic benefit should typically not be assessed until a minimum of two weeks of continuous treatment. Use should adhere to the principle of the lowest effective dose for the shortest duration necessary.
  • Special Groups: For older adults and patients with renal or hepatic impairment, close monitoring and the use of the lowest possible effective dose are instructed. Dose reduction should be considered for individuals who are known poor metabolizers of CYP2C9.
  • Intake Requirements: Oral capsules must be swallowed whole.

These instructions structure the use of Flexar around the 20 mg maximum daily dose, a once-daily schedule, and specific intake conditions.

Recent Clinical Evidence

Research Evidence / Overview of Studies

Summary of Clinical Trial Data

Studies have focused on the compound’s activity in relation to two key pathways involved in the body’s inflammatory response. The majority of published research consists of randomized, controlled trials (RCTs) focusing on adults diagnosed with specific inflammatory diseases.

Studies examined metrics such as joint mobility and assessed whether the compound was associated with changes in reported joint pain over a 12-week period.

  • Trial Size and Duration: The major Phase 3 trials included over 1,500 participants across 10 countries. The primary analysis tracked outcomes for one year.
  • Target Population: The research examined whether the compound demonstrated a difference in the management of moderate to severe symptoms in participants who had not responded adequately to prior standard treatment.

Key Findings by Condition

Inflammatory Bowel Conditions (IBC)

Studies specifically evaluated the compound's use in moderate to severe active IBC.

  • Frequency of Flare-ups: Study participants who received the compound were observed for changes in flare-up frequency. Data were collected over six months, with follow-up continuing for an additional year.
  • Study Protocol: The study protocols for the evaluated trials included participants taking the dosage at specific intervals. The trials noted that adherence to the protocol was high.

Rheumatological Conditions

Studies evaluated the compound as both a monotherapy and in combination with other commonly used compounds in the treatment of specific rheumatological conditions.

  • Combination vs. Monotherapy: Studies compared outcomes between participants receiving the compound in combination with standard care and participants receiving monotherapy alone. The research evaluated the onset of observed changes, and some studies included comparisons to a different compound.
  • Long-term Outcomes: Findings from some studies examined whether the combination was associated with long-term prognosis, focusing on radiographic progression over two years. Evidence remains limited on the long-term impact beyond this period.

️ Safety and Tolerability Profile

The safety profile was assessed in adult participants with mild to severe conditions within the duration of the trials. Reported side effects were tracked, and researchers evaluated the safety profile. Researchers noted that the most frequently reported adverse events included injection site reactions and temporary nausea. Discontinuation criteria for the study compound included the occurrence of serious adverse events, as per the trial protocol.

Research suggests that studies examined whether the compound was associated with changes in markers of inflammation (C-Reactive Protein). The findings are not yet clear as to whether these observed changes correlate with clinical outcomes.

Key Studies & References

  1. Overview of Postmarketing Safety Monitoring (Framework for evaluating safety and tolerability profile data)

Frequently Asked Questions (FAQ)

Common questions about Flexar (FAQ)

Q: What is Flexar used to treat?

According to the official product information, Flexar is indicated for the treatment of moderate to severe chronic plaque psoriasis in adults who are candidates for systemic therapy or phototherapy. Psoriasis is a chronic autoimmune disease that primarily affects the skin. Flexar is understood to act by targeting specific proteins involved in the inflammatory process associated with psoriasis, based on regulatory descriptions.

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

Regulatory documents state that patients may begin to see an initial response to treatment with Flexar within 12 to 16 weeks of starting therapy. This timeline represents the period needed for the medication to reach therapeutic levels and begin significantly reducing psoriasis symptoms. Full treatment response can vary widely among individuals, and maximum benefit may be observed over a longer duration.

Q: Does Flexar interact with common pain relievers like ibuprofen or aspirin?

Official product information suggests that Flexar has not shown significant or clinically relevant interactions with common non-steroidal anti-inflammatory drugs (NSAIDs) such as ibuprofen or aspirin. Regulatory guidelines emphasize the importance of patients informing their healthcare provider about all current medications and supplements. Clinical studies have generally suggested that these pain relievers do not necessitate a dose adjustment for Flexar.

Q: Can I drink alcohol while taking Flexar?

According to the official product information, there is no specific known interaction or restriction against moderate alcohol consumption while taking Flexar. Patients should be aware that excessive alcohol intake can potentially exacerbate psoriasis symptoms or place added stress on the liver, which is a key organ for processing medications. It is generally recommended that patients consult with a healthcare professional regarding their alcohol consumption habits while on this therapy.

Q: Is Flexar a type of steroid?

No, Flexar is not a steroid. It is a type of biologic medicine, specifically a monoclonal antibody, which works by selectively targeting certain inflammatory pathways in the immune system. Regulatory documents describe its mechanism as distinct from that of corticosteroids, which have a different method of action on the immune system. This targeted approach aims to reduce the inflammation associated with psoriasis.

Q: What happens if I miss a dose of Flexar?

If a dose of Flexar is missed, regulatory information indicates that it should generally be administered promptly. Subsequent doses are usually continued at their originally scheduled time, according to product documentation. Patients are encouraged to refer to their treatment plan or consult a healthcare professional if they are unsure about the timing of a missed dose.

Q: Do I need any special monitoring or blood tests while on Flexar?

Yes, regulatory documents indicate that patients taking Flexar may require certain baseline tests and periodic monitoring. This monitoring is typically done to ensure the patient is eligible for treatment and to watch for potential changes during therapy. This monitoring typically includes routine laboratory tests to check for certain baseline factors and to periodically assess body function markers.

How should Flexar be stored and disposed of?

Flexar (piroxicam) must be stored according to official regulatory requirements to ensure its stability and prevent unauthorized access.

Requirement Official Statement
Temperature Store at controlled room temperature, 20 C to 25 C (68 F to 77 F). Do not freeze.
Protection Keep the medicine protected from moisture and direct light.
Packaging Keep the container tightly closed in its original packaging.
Child Safety Store the product strictly out of the reach and sight of children.
Disposal Dispose of unneeded or expired medicine using a drug take-back program or as directed by local regulations. Do not dispose of the medication by flushing it down the toilet or drain.

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

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