Diklojik

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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 Diklojik

Property Description
Active Ingredient Diclofenac
Form Tablet, Capsule, Injection Solution, Topical Gel, Suppository
Pharmacological Class Nonsteroidal Anti-inflammatory Drug (NSAID)
General Purpose Relieves pain, reduces inflammation, lowers fever
Origin Synthetic, Phenylacetic Acid Derivative

Pharmacological Identity and Composition

Diklojik is a trade name for a medication whose active component is Diclofenac, a substance formally categorized as a Nonsteroidal Anti-inflammatory Drug (NSAID). This medication belongs to the Phenylacetic Acid Derivative class, indicating its synthetic origin and specific chemical structure. Diclofenac is recognized globally and supported by pharmacological research as a potent agent in its class. Diklojik is typically marketed as a prescription-only (Rx) medication, used as a single-ingredient product, formulated as the Sodium or Potassium salt, which influences its pharmaceutical properties.

Forms and General Purpose

The active substance Diclofenac is available in a wide range of dosage forms for both systemic and localized effects, including oral tablets, capsules, injection solutions, suppositories, and topical gels. The general purpose of Diklojik, shared by all drugs in the NSAID class, is to provide a comprehensive response to physical discomfort through three core effects: analgesic (pain relief), anti-inflammatory (reduction of swelling and heat), and antipyretic (fever reduction). This makes it clinically recognized for managing general acute discomforts, such as the pain and inflammation associated with musculoskeletal strain. This overall effect is achieved by the drug's mechanism as a Cyclooxygenase inhibitor, which limits the production of pro-inflammatory messengers in the body, providing robust symptomatic relief.

Regulatory References

  1. NIH MedlinePlus

What side effects are possible with Diklojik?

Possible Side Effects and Safety Information: Diklojik

Diklojik (diclofenac) is associated with serious risks that are common to nonsteroidal anti-inflammatory drugs (NSAIDs). Use of the lowest effective dose for the shortest duration possible is advised to mitigate potential risks.


Serious and Clinically Significant Risks

Regulatory authorities document an increased risk of serious cardiovascular thrombotic events, including myocardial infarction (heart attack) and stroke, which can be fatal. This risk may increase with duration of use and higher doses (e.g., 150 mg/day or more). Diklojik is contraindicated for the treatment of pain right before or after coronary artery bypass graft (CABG) surgery.

Additionally, NSAIDs, including Diklojik, pose a risk of serious gastrointestinal (GI) adverse events, such as bleeding, ulceration, and perforation of the stomach or intestines. These events can occur without warning symptoms and may be fatal. Elderly patients and those with a prior history of GI disease are at greater risk.

Common Adverse Reactions

Common side effects generally affect the Gastrointestinal system and may include nausea, vomiting, diarrhea, constipation, dyspepsia, abdominal pain, and gas. Other frequently reported effects include headache, dizziness, drowsiness, and edema (swelling or fluid retention).

Safety Restrictions and Precautions

Contraindications for Diklojik include established ischemic heart disease, peripheral arterial disease, cerebrovascular disease, congestive heart failure (NYHA Class II–IV), and a history of asthma, urticaria, or allergic-type reactions after taking aspirin or other NSAIDs. Caution is required in patients with hypertension, a history of GI bleeding, or renal/hepatic impairment. Patients should be adequately hydrated prior to use to minimize risk of renal adverse reactions.

Overdose and Emergency Response

Diklojik Overdose and When to Seek Help

Taking an amount of Diklojik (diclofenac) that exceeds the prescribed or recommended dose can lead to an overdose. As a nonsteroidal anti-inflammatory drug (NSAID), an acute overdose of diclofenac may cause symptoms that range from mild to severe, though serious complications are generally uncommon following isolated large-scale ingestion.

Signs of Potential Overdose

Symptoms of a potential overdose primarily involve the gastrointestinal and central nervous systems, and may include:

  • Gastrointestinal: Nausea, vomiting (sometimes with blood or material resembling coffee grounds), and epigastric (upper stomach) pain.
  • Neurological: Drowsiness, dizziness, headache, and ringing in the ears (tinnitus). In very severe cases, more pronounced neurological effects such as confusion, convulsions (seizures), or coma may occur.

When to Seek Emergency Medical Help

Always seek immediate emergency medical attention if you suspect an overdose, even if the person appears well. Treatment is generally supportive and aimed at managing symptoms and preventing drug absorption. Do not attempt to induce vomiting unless specifically instructed by a healthcare professional.

Immediate emergency care is mandatory if you observe any of the following serious signs, as they may indicate life-threatening complications:

  • Severe, persistent stomach pain or signs of bleeding (black or bloody stools, or vomiting blood).
  • Difficulty breathing or wheezing.
  • Seizures or loss of consciousness.
  • Signs of kidney issues, such as little to no urine output.

Be prepared to provide the healthcare provider with information about the person's age, weight, the medication name and strength, the amount taken, and the time of ingestion.

Therapeutic Uses of Diklojik

Main Uses and Therapeutic Action

Diklojik is a medication belonging to the class of non-steroidal anti-inflammatory drugs (NSAIDs). It is primarily utilized to manage symptoms associated with inflammatory and degenerative conditions affecting the musculoskeletal system. The active component works by inhibiting the production of prostaglandins, which are chemicals in the body that signal pain and contribute to inflammation.

Inflammatory Joint Conditions

The medication is frequently indicated for the symptomatic relief of various forms of arthritis. By reducing swelling and joint stiffness, it helps improve physical function in conditions such as:

  • Rheumatoid Arthritis: A chronic inflammatory disorder affecting the lining of the joints.
  • Osteoarthritis: A degenerative joint disease characterized by the breakdown of cartilage.
  • Ankylosing Spondylitis: A type of inflammatory arthritis affecting the spine and large joints.

Acute Musculoskeletal Disorders and Trauma

Beyond chronic conditions, Diklojik is used to address short-term, acute episodes of pain and inflammation resulting from physical injury or localized tissue stress. These applications include:

  • Soft Tissue Injuries: Management of inflammation in tendons (tendonitis), ligaments, and bursae (bursitis).
  • Post-Traumatic Pain: Relief of discomfort following sprains, strains, or dislocations.
  • Post-Operative Recovery: Management of pain and swelling following minor surgical or dental procedures.

Other Pain Management Applications

Because of its analgesic properties, the medication may also be used for other specific painful conditions where inflammation is a contributing factor, such as:

  • Acute Gout: Management of the intense pain and inflammation associated with gout attacks.
  • Primary Dysmenorrhea: Relief of painful menstrual cramps.
  • Migraine Attacks: Reduction of symptoms during acute migraine episodes.

Benefits and Expected Outcomes

The primary benefit of Diklojik is the systemic reduction of inflammatory markers, which leads to a significant decrease in localized pain. For patients with chronic conditions, this reduction in symptoms can contribute to increased mobility and a better ability to perform daily activities. For acute conditions, the medication facilitates a more comfortable recovery process by controlling the body's inflammatory response to injury.

Eligibility and Restrictions for Use

The eligibility for using Diklojik (Diclofenac) is strictly governed by authoritative regulatory documents, which define specific populations and conditions that pose a heightened risk, leading to contraindications or restricted use.

Classification Status & Official Constraint
Absolute Contraindications Must Not Be Used in patients with known hypersensitivity (allergy) to diclofenac or other Nonsteroidal Anti-inflammatory Drugs (NSAIDs), a history of aspirin-sensitive asthma, active gastrointestinal (GI) bleeding or ulceration, or for pain related to Coronary Artery Bypass Graft (CABG) surgery.
Cardiovascular Exclusion In some regulatory regions (e.g., EU/UK), use is contraindicated in patients with established congestive heart failure (NYHA II-IV), ischaemic heart disease, or cerebrovascular disease.
Pregnancy/Lactation Contraindicated starting at 30 weeks gestation due to fetal risk. Use is generally avoided after 20 weeks. Diclofenac passes into breast milk, and use during lactation requires a clinical decision weighing benefits and risks.
Age and Organ Function Safety and efficacy are not established for most oral forms in children under 12 years. Use is avoided in patients with advanced renal disease and requires caution in older adults due to increased risk of age-related GI or kidney problems.

What should I know about interactions with other medicines?

Interactions with other medicines and products

Diklojik (Diclofenac) exhibits documented interaction patterns that are classified by regulatory authorities as pharmacokinetic or pharmacodynamic in nature. The official label strictly prohibits co-administration with other systemic Nonsteroidal Anti-inflammatory Drugs (NSAIDs), including analgesic doses of Aspirin, due to an increased risk of adverse events. The medication is also formally contraindicated for the treatment of peri-operative pain in the setting of Coronary Artery Bypass Graft (CABG) surgery.

Documented Exposure and Efficacy Changes

Pharmacokinetic interactions occur with CYP2C9 Inhibitors (e.g., Voriconazole), which are documented to increase the systemic exposure (Cmax and AUC) of Diklojik. Conversely, Diklojik is documented to increase the plasma concentrations of co-administered medicines such as Lithium, Digoxin, and Methotrexate, due to reduced clearance of these substances.

In pharmacodynamic interactions, co-administration with Anticoagulants or Antiplatelet Agents is officially stated to increase the risk of serious gastrointestinal bleeding. Furthermore, Diklojik diminishes the antihypertensive and natriuretic effects of ACE Inhibitors, ARBs, and Diuretics.

Constraints and Population Notes

Alcohol consumption is documented to increase the risk for serious gastrointestinal adverse events. For certain oral forms, the medication must be taken on an empty stomach. The risk of renal function deterioration is heightened in the elderly or renal-impaired when co-administered with ACE Inhibitors.

Mechanism of Action

Inhibition of Prostaglandin Synthesis

Diklojik's mechanism centers on the competitive inhibition of Cyclooxygenase (COX) enzymes, specifically the inducible COX-2 isoform, which drives chemical messenger production at the site of heightened inflammatory activity. This action prevents the conversion of Arachidonic Acid into Prostaglandins (PGE2), thereby reducing the primary source of signaling mediators that influence inflammatory response, fever, and nociceptor sensitization.


️ Central Thermoregulation and Peripheral Analgesia

Systemically, the reduction of Prostaglandins in the brain's hypothalamus leads to the downward adjustment of the hypothalamic temperature set-point. Peripherally, the molecule exerts a multi-target anti-nociceptive effect by desensitizing peripheral pain receptors (nociceptors) through reduced PGE2 levels and, in a non-COX action, the direct blockade of channels like Acid-Sensing Ion Channels (ASICs) on sensory neurons.


Mechanistic Scope: Symptomatic Modulation

The molecule's action is confined to modulating signaling mediators and receptor activity in response to acute stimuli. The mechanism does not engage with the underlying structural or immunological pathology of chronic diseases; its sole function is to modulate elevated physiological signaling, consistent with an action confined to the acute biochemical consequences of pathology.

Dosage and Administration Information

How Diklojik is Used: Official Administration Guidelines

Diklojik (Diclofenac) is used according to specific, non-interchangeable regimens established for clinical use. Usage is fundamentally guided by the principle of administering the lowest effective dose for the shortest duration necessary to achieve symptomatic relief.

Administration Routes and Forms

This medication is available across multiple routes of administration. Systemic delivery is achieved through Oral forms (immediate-release, delayed-release, or extended-release tablets/capsules), Intramuscular (IM) injection, Intravenous (IV) injection, and Rectal suppositories. Localized relief is achieved via Topical gels and solutions.

Standard Dosing and Frequency

Standardized dosing schedules are condition-specific. For chronic management of conditions like Rheumatoid Arthritis, the typical adult daily systemic intake ranges from 150 mg to 200 mg, administered in divided doses. Extended-release forms are typically taken once daily, while immediate-release forms may be prescribed two to four times daily, or utilized on an as-needed (PRN) basis for acute pain.

Intake Requirements and Duration

Proper administration is dependent on the dosage form. Delayed-Release and Extended-Release tablets must be swallowed whole and must not be chewed or crushed. The Oral Powder requires mixing with a small amount of water (e.g., 30 mL to 60 mL) and should be taken without food. For injection, IM and IV use is typically limited to no more than two days of therapy, with continued systemic treatment transitioning to oral or rectal forms.

Recent Clinical Evidence

Research Evidence / Overview of Studies

This section provides a strictly descriptive overview of what clinical research and academic studies have evaluated regarding this drug. It does not offer clinical advice, endorse the treatment, or interpret suitability for individual patients.


Summary of Key Study Findings

Research has investigated the drug's activity by focusing on specific inflammatory pathways.

  • Studies have investigated whether the drug is associated with improvements in symptoms and whether it may have an effect on acute pain episodes.
  • Research has explored whether the drug affects chronic inflammatory markers, noting changes in C-reactive protein (CRP) levels.
  • Clinical studies have examined the drug's use in managing moderate to severe pain associated with conditions like rheumatoid arthritis and osteoarthritis.

Areas of Further Research

Dosing and Administration

Research examined outcomes associated with taking the full course of treatment, with some trials focusing on variations in dosing schedules. The goal of these studies was to understand the consistency of effect over a study period.

Combination Therapy

Research has explored whether the combination of this drug with a disease-modifying anti-rheumatic drug (DMARD) is associated with changes in patient outcomes compared to DMARD monotherapy. This research focus is on synergistic or additive effects.

Safety and Tolerability Profile

The most commonly reported side effects in studies were those described as mild. These effects often involved the gastrointestinal tract and nervous system.

  • Clinical studies have examined outcomes for patients with a known hypersensitivity to nonsteroidal anti-inflammatory drugs (NSAIDs) or specific pre-existing cardiovascular risks, with research findings having suggested these factors may be relevant to patient outcomes.
  • Comparative studies have evaluated this treatment against older classes of drugs, specifically examining differences in the frequency and type of gastrointestinal adverse events.

This approach is under research for potential effects on the reduction of inflammation, but its long-term impact on disease progression is an ongoing subject of investigation.

Key Studies & References

  1. Cardiovascular and gastrointestinal toxicity of long-term selective cyclooxygenase-2 inhibitors (COXIBs) and non-selective NSAIDs: a meta-analysis of randomized controlled trials
  2. Impact of dosing frequency and timing on the effectiveness of nonsteroidal anti-inflammatory drugs (NSAIDs) for chronic pain management: A systematic review
  3. Effect of Non-Steroidal Anti-Inflammatory Drugs on C-Reactive Protein and other inflammatory markers in chronic inflammatory conditions
  4. Drug Interaction and Co-administration of NSAIDs with Disease-Modifying Anti-Rheumatic Drugs (DMARDs): A Clinical Guideline Review
  5. Clinical Guideline: Management of Rheumatoid Arthritis

Frequently Asked Questions (FAQ)

Common questions about Diklojik (FAQ)


Q: What specific conditions is Diklojik approved to treat?

Regulatory documents state that Diklojik is approved to manage acute pain and to treat symptoms of chronic inflammatory conditions such as rheumatoid arthritis (RA), osteoarthritis (OA), and ankylosing spondylitis. In some forms, it is also approved for treating painful conditions like menstrual cramps and acute migraine attacks.


Q: How quickly can a person expect Diklojik to start working?

The time it takes for relief to begin depends on the specific dosage form. For most non-gel oral forms, the onset of pain relief is generally expected within 30 minutes of taking the dose.


Q: How long does the effect of one dose of Diklojik typically last?

According to official product information and clinical data, the analgesic (pain-relieving) effect of a single dose of Diklojik can typically last up to eight hours. The frequency of dosing is determined based on the specific condition being treated and the duration of effect.


Q: What is the difference between Diklojik and its generic version, if one exists?

Diklojik is the brand name for the active ingredient, Diclofenac. The generic version contains the same active ingredient and is required to meet regulatory standards for quality and performance equivalent to the brand product. Generic versions must demonstrate bioequivalence, meaning they achieve the same concentration in the bloodstream over the same period.


Q: Can Diklojik cause dependence or is it a controlled substance?

No, Diklojik is classified as a Nonsteroidal Anti-inflammatory Drug (NSAID) and is not typically classified as a controlled substance or narcotic. Official documents indicate that it is not associated with dependence or addiction.


Q: Is Diklojik known to interact with herbal supplements or vitamins?

Official product information advises that caution is needed when taking Diklojik with various other products, including some herbal supplements or high-dose vitamins. This is particularly important for products that might affect the liver or kidneys, as these interactions can sometimes increase the risk of side effects.


Q: What kind of monitoring or blood tests are generally required when taking Diklojik?

For patients taking Diklojik over a long-term period, official warnings indicate that certain monitoring is often recommended. This typically includes periodic blood tests to check for any changes in liver function (hepatic) and kidney function (renal).


Q: What happens if a person stops taking Diklojik suddenly?

For individuals on long-term treatment, safety documents state that treatment review with a healthcare provider is recommended before making changes, and abrupt discontinuation is generally not advised. When stopped, the effects of the medication will gradually wear off, and the original symptoms may return.


Q: Is it normal to feel a change in energy or mood after starting Diklojik?

The official label for this medication includes potential side effects that affect the central nervous system (CNS), such as dizziness and drowsiness. Furthermore, rare reports of mental health-related effects, including changes in mood or feelings of irritability, have been documented.


Q: Why is it necessary to take Diklojik even if symptoms seem to improve?

For chronic conditions like arthritis, regulatory guidance emphasizes that the medication works to manage symptoms but does not cure the underlying disease. The regulatory guidance highlights that to help maintain consistent relief, the medication is often taken daily according to the prescribed regimen, even when symptoms are not acute.


Q: Does the time of day matter when taking Diklojik?

The timing depends on the specific form prescribed and the condition being managed. Official dosing information mentions that for some forms or conditions where pain is often worst at night or in the morning, the medication may be recommended for dosing in the evening to maintain drug levels overnight.


Q: Is Diklojik a first-line treatment option, according to regulatory information?

Official indications and usage statements suggest its role as a common first-line therapy option. As an NSAID, it is widely used as one of the initial choices for the management of acute and chronic pain and inflammation, depending on the specific condition.


Q: What is the 'half-life' of Diklojik?

The official product information cites the elimination half-life of Diclofenac in the plasma as being approximately 1.2 to 2 hours. The half-life refers to the time it takes for half of the active drug to be cleared from the bloodstream.


Q: Are there any known genetic factors that affect how people respond to Diklojik?

Studies cited in regulatory reviews suggest that specific genetic variations in the enzymes that process the drug in the body may be relevant. These variations have been associated with changes in the rate the drug is broken down, which could potentially impact the risk of adverse effects, such as liver injury.


Q: Do official documents mention any potential for Diklojik to affect fertility?

Official information notes that anti-inflammatory drugs like Diklojik can potentially affect ovulation in women, particularly when taken for a long time or in high doses. Official information indicates that this action is a possibility that may be relevant to conception in women.


Q: Is it possible to take too much of a non-prescription product that shares an ingredient with Diklojik?

Official warnings address the risk of accidental overdose and advise patients to be mindful of the total amount of the active ingredient, Diclofenac, that is being consumed. This includes ensuring they are not unintentionally co-administering the drug from both prescription and non-prescription products.


Q: Where can a person find the official patient information leaflet for Diklojik?

The official patient documentation, sometimes called the Patient Information Leaflet (PIL) or Consumer Medicine Information (CMI), is provided with the dispensed medication. It is also available in the public drug databases maintained by government regulatory authorities.

How should Diklojik be stored and disposed of?

Storage Requirements

Diklojik (Diclofenac) must be stored according to official regulatory specifications to maintain product integrity. Oral tablets and capsules must be stored at controlled room temperature, typically 20 C to 25 C (68 F to 77 F). The medication must be protected from moisture and direct light and should remain in its original container, which must be kept tightly closed.

Child Safety and Disposal

As a mandatory safety requirement, the product must be stored out of the sight and reach of children and pets. Unused or expired Diklojik must be discarded following official guidelines, preferably through a drug take-back program. It is prohibited to dispose of the medication by pouring it down the sink or toilet, as it must not enter the wastewater system.

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

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