Flector 1%

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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 Flector 1%

Quick Facts

Property Description
Active ingredient Diclofenac epolamine
Form Topical patch (medicated plaster)
Pharmacological class Non-Steroidal Anti-Inflammatory Drug (NSAID)
Common purpose Localized anti-inflammatory and analgesic effect
Origin Synthetic (phenylacetic acid derivative)

The medicinal product Flector 1% is a specialized pharmaceutical preparation designed for cutaneous administration, utilizing a topical patch to deliver localized pain relief and reduce inflammation. This formulation ensures that the therapeutic action is concentrated at the site of application.


What Type of Medicine is Flector 1%?

Flector 1% is categorized as a Non-Steroidal Anti-Inflammatory Drug (NSAID). This pharmacological classification confirms the drug’s role in modulating the body’s inflammatory responses. The active ingredient, Diclofenac epolamine, is a synthetic compound chemically identified as a phenylacetic acid derivative.

The design as a medicated plaster facilitates a non-systemic approach, concentrating the drug beneath the patch for local action, a method often chosen for managing localized soft tissue discomfort. This topical system is clinically recognized for its targeted delivery, supporting relief in the area of application.

Composition and Pharmaceutical Form

The composition relies on the single active ingredient, Diclofenac epolamine, contained within a hydrophilic adhesive matrix and a non-woven backing layer. This specific salt form is used to optimize the release and penetration of the drug through the skin.

The 1% concentration refers to the specific strength of the active agent within this transdermal delivery system. This arrangement is fundamentally different from oral forms of NSAIDs, as it is engineered to sustain the release of the medication directly into the localized tissues for prolonged action.

General Purpose and Core Action

The general therapeutic purpose of Flector 1% is to provide analgesic and anti-inflammatory effects. Its action is based on the NSAID mechanism of inhibiting cyclooxygenase enzymes, which leads to a reduction in the body's production of prostaglandins. Since prostaglandins mediate inflammation and transmit pain signals, reducing their synthesis directly addresses the source of localized discomfort and swelling.

Regulatory References

  1. Diclofenac Transdermal Patch: MedlinePlus Drug Information

What side effects are possible with Flector 1%?

Possible Side Effects and Safety Information

The safety profile for the diclofenac epolamine topical patch is characterized predominantly by adverse reactions occurring at the application site. Regulatory documents classify these localized effects as Common, affecting up to 10% of users. These reactions include pruritus (itching), erythema (redness), various types of rash, and a burning sensation.

While systemic exposure is lower than with oral forms, the medicine’s active ingredient requires regulatory inclusion of the potential for the NSAID class effects. Serious adverse reactions, though classified as Very Rare, must be acknowledged and involve severe hypersensitivity reactions (e.g., angioedema) and gastrointestinal ulceration, bleeding, or perforation.

Adverse effects are grouped by official System-Organ Classes, most frequently involving the Skin and Subcutaneous Tissue Disorders, but also including Immune System, Gastrointestinal, and Nervous System disorders. Localized reactions, such as itching and redness, are often noted to occur most frequently at the beginning of treatment.

Official safety statements define patient-specific constraints. The patch is contra-indicated for individuals with a history of asthma, urticaria, or acute rhinitis precipitated by aspirin or other NSAIDs, and its use is restricted during the third trimester of pregnancy. Furthermore, the patch must not be applied to broken skin, wounds, or infections.

Overdose and Emergency Response

Overdose and when to seek help

The information regarding overdose for Flector 1% (diclofenac epolamine) is aligned with the known systemic risks of its active ingredient, Diclofenac, a Non-Steroidal Anti-Inflammatory Drug (NSAID). Due to the topical nature of the patch, the risk of systemic overdose is low but remains a concern following excessive application or accidental ingestion.

Overdose manifestations, reflecting systemic exposure, may include gastrointestinal symptoms such as nausea, vomiting, abdominal pain, and Central Nervous System effects like headache and drowsiness. Regulatory documents note that overexposure can escalate to serious, potentially fatal outcomes associated with systemic NSAID toxicity.

These severe outcomes include cardiovascular thrombotic events (such as heart attack or stroke), gastrointestinal bleeding or perforation, acute renal toxicity, and liver injury. The risk of these serious events is explicitly noted to be greater in the elderly and in patients with preexisting renal or hepatic impairment.

When to Seek Immediate Medical Help

Official prescribing information mandates that individuals seek emergency medical help right away if they experience any signs of a serious allergic reaction (anaphylaxis), or symptoms indicative of a heart attack or stroke (e.g., chest pain, sudden weakness).

Management of Overdose

Treatment is symptomatic and supportive, as no specific antidote is known for diclofenac overexposure. Close hospital monitoring, particularly of renal function and cardiovascular parameters, may be required in cases of significant exposure.

Therapeutic Uses of Flector 1%

What Flector 1% Treats: Main Uses and Benefits

This medication is used in areas where short-term symptom management is appropriate for symptoms related to physical discomfort. It is commonly used across conditions presenting with acute episodes and localized discomfort. The medication is considered relevant for easing pain in these contexts.

Flector 1% is also applied across domains where additional symptomatic support is needed to address symptoms related to inflammatory or irritative states. It helps manage discomfort when groups of symptoms, like swelling and pain, appear suddenly. This contributes to improved day-to-day comfort during symptomatic periods. It may be part of symptomatic management in situations where patients experience heightened discomfort, offering symptomatic relief that helps patients cope more steadily with symptom fluctuations. It supports patients during episodes of heightened discomfort that interfere with routine activities.

Quick Fact: Relief for Localized Pain and Swelling

Eligibility and Restrictions for Use

Flector 1% eligibility is strictly defined by regulatory documents, establishing clear boundaries for who may use the medicine.

Population Status Official Regulatory Statement
Allowed The medicine is indicated for use in adults (18 years and older). Some jurisdictions approve use for pediatric patients 6 years of age and older.
Contraindicated Use is prohibited for individuals with a known hypersensitivity to diclofenac, aspirin, or other NSAIDs, or a history of related allergic reactions. Contraindicated for pain following Coronary Artery Bypass Graft (CABG) surgery and in the third trimester of pregnancy (at or after 30 weeks gestation).
Restricted Use should be avoided in cases of severe heart failure and advanced renal or hepatic impairment. The patch must not be applied to damaged or non-intact skin. Use in the second trimester of pregnancy and during lactation requires caution.
Age Limits Safety and effectiveness have not been established for use in children under 6 years of age. Older adult patients (65 and over) require caution due to increased risk factors.

These official statements define who may use the medicine by establishing absolute contraindications related to allergies, surgical status, and late pregnancy. They impose mandatory age restrictions and require avoidance or caution based on severe organ dysfunction and other preexisting cardiovascular conditions.

What should I know about interactions with other medicines?

The official regulatory profile for the diclofenac epolamine topical system outlines several specific interaction patterns with other medicines and substances.

Category Official Interaction Outcome
Co-Administration The use of this topical system with any oral Non-Steroidal Anti-Inflammatory Drug (NSAID), including analgesic doses of Aspirin, is not generally recommended due to increased risk of serious gastrointestinal (GI) events.
Bleeding Risk A synergistic effect on bleeding risk exists when used with Anticoagulants (e.g., Warfarin), Oral Corticosteroids, and drugs that interfere with hemostasis like SSRIs, leading to a higher documented risk of serious GI bleeding.
Antihypertensives Co-administration may diminish the antihypertensive effect of ACE Inhibitors, Angiotensin Receptor Blockers (ARBs), and Beta-Blockers, or reduce the natriuretic effect of Diuretics. This combination increases the risk of deterioration of renal function in elderly, volume-depleted, or renal-impaired patient populations.
Increased Toxicity The product can elevate the plasma levels of Lithium and Digoxin. Concomitant use may also enhance the toxicity of Methotrexate and Cyclosporine due to effects on clearance.
Substances Alcohol is identified as a risk factor that increases the risk of GI bleeding in NSAID-treated patients.

The interaction structure is defined by the potential for pharmacodynamic reinforcement of GI risk and the modification of systemic exposure or efficacy of co-administered drugs, emphasizing risk management in at-risk patient groups.

Mechanism of Action

The mechanism of action for the active ingredient, Diclofenac epolamine, is confined to the peripheral tissues and focuses on modulating the key biochemical cascade that mediates inflammatory and nociceptive signaling.

Molecular Blockade of Inflammatory Synthesis

This domain covers the drug’s direct interaction with its biological targets: the Cyclooxygenase (COX) enzymes. Diclofenac acts as a reversible inhibitor of these enzymes, particularly COX-2. By blocking their catalytic activity, the drug suppresses the metabolic conversion of Arachidonic Acid into key pro-inflammatory mediators, primarily prostaglandins. This fundamental molecular blockade limits the chemical signals that modulate the inflammatory cascade.

️ Modulation of Nociceptive and Vascular Responses

This molecular action affects processes downstream of prostaglandin synthesis. The reduction in local prostaglandin concentration, especially PGE2, achieves two primary physiological effects: it reduces the sensitization of peripheral pain fibers (nociceptors), resulting in a higher threshold for nociceptor activation; and it decreases vascular permeability. This modulation acts to restrict the influence of excessive mediator activity on tissue responses, modulating the afferent nociceptive signaling and decreasing the rate of fluid exudation (edema).

Targeted Mechanism-Delivery

Flector 1% utilizes the epolamine salt not as a second active ingredient, but as a facilitator to optimize the mechanistic action. This salt form enhances the solubility and penetration of the Diclofenac molecule through the skin. This delivery system ensures a sufficient local concentration of the COX inhibitor reaches the deep, local targets (tendons, fascia) beneath the patch, and concentrates the inhibition mechanism at the necessary peripheral site.

Dosage and Administration Information

How Flector (Diclofenac Epolamine) Topical System is Used

The administration of Flector (diclofenac epolamine) topical system is defined by specific guidelines to ensure localized drug delivery and appropriate exposure.

Administration and Dosage Regimen

Feature Official Instruction
Route Topical (cutaneous application) via a medicated adhesive patch.
Dose One (1) topical system applied to the most painful area. The patch is 1.3% diclofenac epolamine.
Frequency Twice a day (every 12 hours).
Duration Principle Use the lowest effective dosage for the shortest duration consistent with treatment goals.

Application and Handling Instructions

Flector is intended for administration only to intact skin; it must not be applied to non-intact or damaged skin, such as areas with wounds, burns, or dermatitis. The correct application procedure emphasizes proper placement and hygiene.

The patch must be applied directly to the body part requiring symptomatic relief. The topical system should not be worn when bathing or showering. Furthermore, hands must be washed thoroughly after applying, handling, or removing the patch to avoid unintended contact. If the patch edges begin to separate, they may be secured with tape, and a non-occlusive mesh netting sleeve may be used to help keep the patch in place, especially over a joint.

Usage Constraints

The twice-daily regimen is the same for adults and pediatric patients 6 years of age and older. Concomitant use with an oral Non-Steroidal Anti-Inflammatory Drug (NSAID) is not recommended unless a close clinical evaluation and monitoring of the patient is conducted to ensure the benefits outweigh the risks.

Recent Clinical Evidence

Research Evidence / Overview of Studies for Flector 1%

The research base for Flector 1% was evaluated in studies focused on specific, acute musculoskeletal symptoms, relying primarily on Randomized Controlled Trials (RCTs). This summary details the structure of the evidence and highlights what is known—and what is still uncertain. The research provides context but not individual predictions.


Evidence for Use in Acute Minor Soft Tissue Injuries

This section will summarize the structure of the primary clinical research, focusing on the randomized controlled trials (RCTs) and systematic reviews conducted for the patch’s use in conditions like minor strains, sprains, and contusions, describing the outcomes and patient assessments measured in these studies.

Clinical trials and systematic reviews examined the patch for conditions associated with acute or disruptive episodes, specifically minor strains, sprains, and contusions. Studies monitored the measurements of pain score changes over the study period. Research also explored measures of Global Response to Therapy, reflecting the patient’s or investigator's overall assessment of the outcomes observed during the study period.

Follow-up Duration and Characterization of Short-Term Data

Clinical trials focused on episodes where symptoms become more noticeable, and follow-up durations were limited. The study observations were derived from trials following participants for a maximum of 14 days. Therefore, the research provides insight into short-term changes observed during the study period, helping contextualize how patients reported their experience over the first one to two weeks.

Evidence in Specific Populations

While the core studies involved adults, the patch was evaluated in a post-marketing research context involving pediatric patients aged 6 through 16 years who had minor soft tissue injuries. This research explored short-term symptom patterns in these younger populations. The results apply only to the populations studied in the trials.

What Remains Uncertain and Research Gaps

Research exploring short-term symptom changes exists, but the evidence remains limited regarding certain longer-term aspects. Long-term effects are not fully established, as follow-up durations were limited, providing limited information for long-term outcomes beyond the typical 14-day observation period. Furthermore, the evidence base is concentrated on the study of minor soft tissue injuries and lacks evidence regarding use in conditions associated with functional limitations or more severe or chronic pain.

Key Studies & References

  1. Review of the efficacy and tolerability of the diclofenac epolamine topical patch 1.3% in patients with acute pain due to soft tissue injuries (Systematic Review Abstract)

Frequently Asked Questions (FAQ)

Common questions about Flector 1% (FAQ)


Q: Does Flector 1% contain an opioid?

A: No, the active ingredient is Diclofenac epolamine, which is classified as a Non-Steroidal Anti-Inflammatory Drug (NSAID). Official product information confirms that this topical system does not contain any opioid medications.


Q: Is Flector 1% a type of steroid medication?

A: No, Flector 1% is classified as a Non-Steroidal Anti-Inflammatory Drug (NSAID). The 'non-steroidal' component of this designation confirms that the medicine is not a steroid medication.


Q: Do I need a prescription to get Flector 1%?

A: According to official regulatory status, Flector 1% (Diclofenac Epolamine Topical System) is designated as a prescription-only medication.


Q: Does Flector 1% have a special warning label or black box warning?

A: Yes, the official regulatory label contains a Boxed Warning. This warning is mandated for NSAIDs and alerts prescribers and patients to the potential for serious cardiovascular events (such as heart attack or stroke) and serious gastrointestinal adverse events (such as bleeding or ulceration).


Q: Is Flector 1% the same kind of medicine as oral pain pills?

A: The active ingredient, Diclofenac epolamine, is classified as a Non-Steroidal Anti-Inflammatory Drug (NSAID), which is the same class as certain oral pain pills. The key difference lies in the topical patch delivery, which is designed to concentrate the medicine at the application site and reduce the amount of medicine that enters the rest of the body.


Q: What is the difference between Flector 1% and other topical diclofenac products like gels?

A: Flector 1% is provided as a medicated topical patch or plaster for application to the skin. This pharmaceutical form of a patch differs from other diclofenac topical products that may be available as gels or creams.


Q: What common non-prescription pain relievers should not be taken with Flector 1%?

A: Official interaction information advises against co-administration with other oral Non-Steroidal Anti-Inflammatory Drugs (NSAIDs), including common non-prescription pain relievers like Aspirin. This is due to a documented increased risk of serious gastrointestinal events.


Q: How long does the pain relief from Flector 1% typically last?

A: The design of the topical system is based on an intended application frequency of every 12 hours. This schedule is established to maintain the delivery of the active ingredient at the localized site.


Q: How long can I typically use Flector 1% before stopping?

A: Regulatory guidance advises that the product be used at the lowest effective dosage for the shortest duration that is consistent with the goals of treatment. Clinical trials supporting the product's effectiveness followed patients for a maximum of 14 days.


Q: Can Flector 1% be used for chronic back pain?

A: Official regulatory information indicates that Flector 1% is approved for the short-term relief of acute pain stemming from conditions like minor sprains and strains. Studies supporting the use of this topical system were focused on these acute symptoms, and evidence regarding its long-term use for chronic pain conditions, such as chronic back pain, is limited.


Q: Is Flector 1% used for arthritis pain?

A: The official indications for Flector 1% are for the relief of acute pain associated with minor soft-tissue injuries. The product was studied in the context of these short-term, acute conditions, and regulatory documents do not list chronic pain conditions like arthritis as an approved use.


Q: Can Flector 1% cause stomach problems like oral NSAIDs?

A: As a diclofenac product, the label includes a warning about the potential for serious gastrointestinal adverse events, such as bleeding, ulceration, or perforation. While the patch provides lower overall systemic exposure compared to oral pills, this potential class risk must still be acknowledged according to official regulatory documents.


Q: Can Flector 1% affect my blood pressure?

A: As an NSAID-containing product, Flector 1% carries a warning that it may cause new high blood pressure or worsen existing high blood pressure. It is also described in regulatory sources as potentially reducing the effectiveness of certain blood pressure-lowering medications when used at the same time.


Q: What are the possible signs of an allergic reaction to Flector 1%?

A: Signs of a serious allergic reaction may include hives, difficulty breathing, or swelling of the face, lips, tongue, or throat (angioedema). Official documents emphasize that the product is contraindicated for anyone with a known history of allergic reactions to diclofenac, aspirin, or other NSAIDs.


Q: Can sun exposure affect the area where Flector 1% was applied?

A: Regulatory warnings indicate that topical diclofenac products may increase the risk of a photosensitivity reaction (a reaction to sunlight, like a severe sunburn or rash) in the area where the product was applied. The label contains guidance regarding the necessity of limiting sun exposure during and shortly after product use.


Q: Can I exercise or swim with the Flector 1% patch on?

A: The official application instructions state that the patch should not be worn when bathing or showering. This guidance suggests avoiding all activities involving prolonged immersion in water, such as swimming.


Q: Is it normal to feel a warming sensation when wearing the Flector 1% patch?

A: Official documents classify a burning sensation as one of the localized adverse skin reactions that may occur at the application site for this product.


Q: What is the purpose of the adhesive material on the Flector 1% patch?

A: The adhesive matrix of the patch serves two primary purposes described in product information. It is necessary to hold the topical system firmly in place to maintain continuous contact with the skin, and it helps facilitate the controlled delivery of the medicine into the deeper, localized tissues.


Q: What is the risk of the medicine from the patch getting into my bloodstream?

A: The topical patch is designed to deliver the medicine locally to the affected tissue, leading to lower systemic exposure (the amount of medicine that enters the bloodstream) compared to taking the drug as a pill. However, because some systemic exposure does occur, the product label includes the full warnings for the NSAID drug class.


Q: Is Flector 1% generally considered a safer option than taking a pill for localized pain?

A: Official clinical data indicates that the topical system results in lower systemic exposure of diclofenac compared to taking the medicine orally. This design aims to concentrate the medicine locally, though the product label still includes the full spectrum of NSAID class warnings.


Q: Is it possible to overdose on Flector 1% patches?

A: The regulatory label includes information on overdose potential. While unlikely with correct topical application, overdose could occur through improper use or accidental ingestion, which may lead to systemic NSAID toxicity.


Q: Does Flector 1% have a generic version available?

A: Official product information confirms that generic versions of the Diclofenac Epolamine Topical System are available to the public.


Q: What are the ingredients, besides the main drug, in the Flector 1% patch?

A: Official documents list the inactive ingredients, which typically include substances that form the adhesive and backing layers of the patch. Examples of these components include glycerin, gelatin, tartaric acid, and propylene glycol.

How should Flector 1% be stored and disposed of?

How to Store and Dispose of Flector Topical System (1.3%)

The Flector Topical System must be stored at Controlled Room Temperature, defined as 20 C to 25 C (68 F to 77 F). Permitted temperature fluctuations extend from 15 C to 30 C.

Packaging and Child Safety

The patches are supplied in resealable envelopes, and the envelope must be sealed at all times when not in use to prevent the unapplied patches from drying out and compromising stability. It is mandatory to store the patches, both unused and used, out of the reach of children and pets to prevent accidental exposure.

Disposal Requirements

Upon removal, the used patch must be folded in half so the adhesive sides stick together. The folded patch must then be immediately discarded into a trash receptacle that is secured and inaccessible to children and pets.

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

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