Voltaren 75

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Medically reviewed

Laura Arias

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 Voltaren 75

Property Description
Active Ingredient Diclofenac sodium
Form Modified-Release Oral Tablet
Pharmacological Class Nonsteroidal Anti-inflammatory Drug (NSAID)
Common Therapeutic Purpose Relief of pain and management of inflammation
Origin Synthetic, phenylacetic acid derivative

What Type of Medicine is Voltaren 75 and What is its Composition?

Voltaren 75 is a prescription medication whose active substance is Diclofenac, which belongs to the class of drugs known as Nonsteroidal Anti-inflammatory Drugs (NSAIDs). This medication is used for addressing pain, swelling, and fever, and is recognized for its ability to reduce the internal processes that cause these symptoms. Voltaren 75 is a single-component product, containing only Diclofenac sodium as its therapeutic agent. The active ingredient, Diclofenac, is a synthetic compound derived from the phenylacetic acid class.


How Does the Modified-Release Tablet Form Provide General Relief?

The pharmaceutical form of Voltaren 75 is an oral solid dosage form engineered as a modified-release tablet with a dosage strength of 75 mg. The medication is designed so that the active compound is not released immediately but is gradually delivered into the system over an extended period. This extended-release mechanism provides a consistent presence of the active substance in the body. Diclofenac achieves its general therapeutic purpose—providing analgesic properties and an anti-inflammatory effect—by inhibiting the synthesis of prostaglandins, which are chemical messengers that signal pain and drive the inflammatory response. Diclofenac acts to reduce inflammation and manage discomfort associated with conditions requiring sustained symptomatic control.

Regulatory References

  1. National Institutes of Health (NIH)

What side effects are possible with Voltaren 75?

Possible Side Effects and Safety Information

Serious Safety Risks

Official regulatory information emphasizes the potential for serious, sometimes fatal, risks associated with this medicine. These risks are described in Boxed Warnings within official labeling:

  • Cardiovascular Thrombotic Events: Use of this medicine may increase the risk of serious events like myocardial infarction (heart attack) and stroke, which can be fatal. This risk may increase with the duration of use and the dose taken.
  • Gastrointestinal Risk: This medicine may cause serious gastrointestinal adverse events, including inflammation, bleeding, ulceration, and perforation of the stomach or intestines. These events can occur without warning symptoms and may be fatal. Elderly patients are at greater risk for these events.

Contraindications and Restrictions

This medicine must not be used in certain situations or patient populations, as defined in official regulatory documents:

  • Immediately before or after coronary artery bypass graft (CABG) surgery.
  • In patients with established congestive heart failure (New York Heart Association [NYHA] Class II-IV), ischemic heart disease, peripheral arterial disease, or cerebrovascular disease.
  • Beginning at 30 weeks of pregnancy due to the risk of premature closure of the fetal ductus arteriosus.

Adverse Reactions by Body System

Side effects are officially categorized by frequency and the body system affected (System-Organ Class). Common reactions documented in regulatory sources include headache, dizziness, abdominal pain, indigestion (dyspepsia), and diarrhea. Serious reactions, classified as rare or very rare, include severe skin reactions (such as Stevens-Johnson Syndrome and Toxic Epidermal Necrolysis) and severe hepatic (liver) injury. Patients are advised that the lowest effective dose should be used for the shortest possible duration to minimize the potential for serious cardiovascular and gastrointestinal risks.

Overdose and Emergency Response

Overdose and when to seek help

Regulatory documentation mandates that individuals seek immediate medical attention or emergency help if an overdose of Diclofenac sodium is suspected. Upon suspicion, emergency services or a Poison Control Center should be contacted immediately, and vomiting should not be induced unless explicitly directed by medical personnel.

Documented Overdose Manifestations

System Manifestations Listed in Regulatory Labels
Gastrointestinal Nausea, vomiting (sometimes bloody or resembling coffee grounds), stomach pain, or black/tarry stools (melena).
CNS Drowsiness, dizziness, headache, agitation, confusion, and tinnitus. Severe outcomes include seizures and coma.
Severe Organ Effects Acute renal failure, liver failure (hepatic necrosis), and potentially fatal gastrointestinal perforation or bleeding.

Official Management and Constraints

No specific antidote is known for Diclofenac overdose. Management is primarily symptomatic and supportive care. Specific protocols documented in prescribing information may include the potential use of activated charcoal for decontamination in cases of large overdose. Due to the drug’s high protein binding, interventions such as hemodialysis are noted as potentially not useful.

Elderly patients are documented as being at greater risk for serious gastrointestinal events in an overdose scenario. Monitoring includes vital signs, ECG, and renal function.

Therapeutic Uses of Voltaren 75

What Voltaren 75 Treats: Main Uses and Benefits

Voltaren 75 is commonly used to help with symptomatic relief, applied across therapeutic domains where additional support is needed for managing pain and inflammation. The medication is considered relevant for easing symptoms that interfere with daily functioning.

It is used in situations involving certain distressing symptoms related to conditions like chronic inflammatory joint disorders (e.g., osteoarthritis, rheumatoid arthritis, ankylosing spondylitis); acute inflammatory episodes (gout); and painful syndromes of the vertebral column and inflammatory gynecological pain (primary dysmenorrhea).

When symptoms become intense or disruptive, particularly those characterized by persistent joint pain, stiffness, and inflammation, the use of this medication provides support that helps ease the overall symptom burden. “It is applied in scenarios where additional management of discomfort is required, assisting with maintaining functional stability during symptomatic phases.”


Quick Fact: Relief for Joint Pain and Stiffness
This medication is often used during phases when symptoms become more noticeable, specifically providing supportive relief when joint stiffness and pain interfere with routine activities, and contributes to easing the overall symptom load during periods of heightened symptoms.

Eligibility and Restrictions for Use

This section explains the official population eligibility and non-eligibility for Voltaren 75 (diclofenac sodium modified-release) based strictly on regulatory documentation, such as the FDA and EMA prescribing information.

Eligibility Scope: Prohibited and Restricted Use

Category Official Regulatory Statement
Populations for whom use is contraindicated Patients with known hypersensitivity to aspirin or other NSAIDs (asthma, allergic reactions). Prohibited in the setting of peri-operative pain for Coronary Artery Bypass Graft (CABG) surgery; patients with active gastrointestinal bleeding or ulceration (FDA Label; EMA SmPC).
Age-related eligibility rules Pediatric patients (under 18 years): Safety and efficacy of the 75 mg extended-release tablet have not been established. Geriatric patients: Use requires particular caution and the lowest effective dose for the shortest duration (FDA Label).
Condition-specific eligibility rules Contraindicated in patients with established severe heart failure (NYHA Class II-IV), severe hepatic failure, and severe renal failure (EMA SmPC). Contraindicated in established ischemic heart disease or cerebrovascular disease (EMA SmPC).
Pregnancy and lactation eligibility status Contraindicated during the last trimester of pregnancy (from 30 weeks gestation). Use is generally not recommended during breastfeeding (FDA Label; EMA SmPC).

Resulting Eligibility Structure

Official eligibility statements establish that Voltaren 75 is primarily intended for use by adults who do not have any of the specific, documented severe health conditions or life-stage restrictions listed above. The medicine is formally prohibited (contraindicated) for groups where the risk of serious complications is substantially increased, such as those with severe organ dysfunction, late-stage pregnancy, or known NSAID hypersensitivity. Individuals with mild-to-moderate organ impairment or specific cardiovascular risk factors must use the medication only under careful medical surveillance.

What should I know about interactions with other medicines?

Interactions with other medicines and products

Official regulatory documents establish specific constraints regarding the co-administration of Voltaren 75 (Diclofenac sodium) with other medicines and substances. These constraints fall into categorized domains based on the documented interaction pattern.

Interaction Classification Interacting Agents or Conditions Official Pattern/Outcome
Regulatory Prohibitions Other systemic NSAIDs; CABG surgery (perioperative pain) Not permitted for co-administration; Prohibited for use in this procedural setting.
Increased Exposure Risk Lithium; Methotrexate; Digoxin May increase the plasma concentrations and toxicity risk of these co-administered agents through altered renal clearance.

Additive Bleeding and Efficacy Risks

Co-administration with Anticoagulants (such as Warfarin), Corticosteroids, Aspirin, and SSRIs is consistently associated with an additive pharmacodynamic risk of gastrointestinal bleeding or ulceration.

Furthermore, Diclofenac may diminish the therapeutic effect of Diuretics, ACE Inhibitors, and ARBs, potentially reducing their natriuretic or antihypertensive actions. This interaction carries a risk of renal function deterioration, which is particularly noted in elderly patients and individuals with existing renal or hepatic impairment.

Separately, the ingestion of alcohol is linked to an increased risk of gastrointestinal bleeding. The extent of Diclofenac absorption from the modified-release formulation is documented as not significantly affected by food.

Mechanism of Action

How Voltaren 75 Works: Mechanism of Action

Voltaren 75 (Diclofenac) exerts its effect through the precise modulation of prostanoid synthesis pathways responsible for inflammation and nociceptive signaling. The drug’s primary action is the reversible inhibition of the Cyclooxygenase (COX) enzyme system, targeting both the constitutive COX-1 and inducible COX-2 isoforms. This interaction competitively blocks the enzyme's active site, preventing the conversion of arachidonic acid into prostanoid mediators.

By suppressing COX activity, Diclofenac significantly limits the downstream production of key signaling molecules, particularly prostaglandins ( PGE2). These mediators are involved in the sensitization of peripheral nociceptors and the mediation of local vascular responses. The resulting reduction in prostaglandin concentration facilitates a reduction in prostaglandin-mediated nociceptor sensitization and enables an adjustment of the hypothalamic thermoregulatory set point. This mechanism operates both peripherally at tissue sites and centrally in the spinal cord and brain, contributing to the dampening of inflammatory pathway activity.

Dosage and Administration Information

How to Use Voltaren 75 (Diclofenac Sodium Delayed-Release)

This section outlines the instructions for the proper administration and dosing of Voltaren 75 mg (diclofenac sodium) delayed-release tablets. These instructions are procedural and do not address efficacy, side effects, or drug interactions.

Official Administration Guidelines

Field Official Instruction
Route of Administration Oral (by mouth).
Standard Dosing Schedule (Adults) Typically 75 mg twice daily. The maximum recommended daily dose for chronic conditions like osteoarthritis is 150 mg.
Administration Timing The tablets may be taken with or without food. Some instructions advise taking them before meals.
Tablet Handling The delayed-release tablet must be swallowed whole with liquid. The tablet should not be crushed, chewed, or split to maintain the integrity of the specialized coating.
Dose Minimization Use the lowest effective dose for the shortest duration possible, consistent with the individual patient's treatment goals.
Age-Group Rules The 75 mg strength is generally not recommended for pediatric patients (under 18 years). Geriatric patients should use caution and the lowest effective dose.

Procedural Structure

Proper use involves the following sequence:

  1. Swallow the 75 mg tablet whole without altering its form.
  2. Take the dose approximately twice daily, as prescribed, to maintain the total daily dosage.

The administration method and frequency are defined to ensure the proper release of the medication within the body.

Recent Clinical Evidence

Research Evidence / Overview of Studies for Voltaren 75

This section describes the research that has explored diclofenac (the active component of Voltaren 75), focusing on the types of studies conducted, what outcomes were measured, and what remains uncertain in the evidence landscape. This information is for context only and is not medical advice or a substitute for professional consultation.


Evidence for use in Osteoarthritis (OA)

Research exploring diclofenac for osteoarthritis has primarily utilized short-term Randomized Controlled Trials (RCTs), applied in studies examining patient-reported experiences. These studies typically lasted 6 to 12 weeks. The research examined outcomes related to physical discomfort and changes in functional ability, such as those measured by the WOMAC Pain and Physical Function Subscales.

Findings describe patterns observed in the studies related to short-term changes. However, the follow-up durations were limited; therefore, long-term effects are not fully established beyond the typical 12-week study period. The results apply only to the populations studied, and data for certain groups remain insufficient.


Evidence for use in Rheumatoid Arthritis (RA)

Research exploring diclofenac for rheumatoid arthritis was evaluated in research contexts involving fluctuating or unstable symptoms, using short-term RCTs and older double-blind studies. Research examined outcomes such as the duration of morning stiffness, total number of painful and swollen joints, and changes in grip strength.

Studies reported how symptoms evolved in the observed populations during the trial period. The evidence quality varies across studies, and some trials had modest sample sizes. Data for long-term outcomes regarding the effects on structural damage are not consistently available, and certainty remains low regarding the full long-term context.


What is Still Uncertain About Voltaren 75's Evidence

The evidence highlights what is known, and what is still uncertain. Evidence is limited for long-term outcomes across all indications, as the majority of follow-up durations were limited. Findings describe group patterns, not personal outcomes, and the research does not determine whether an individual will respond similarly.

Key Studies & References

  1. NSAIDs for the treatment of pain in knee and hip osteoarthritis: a systematic review and meta-analysis

Frequently Asked Questions (FAQ)

Common questions about Voltaren 75 (FAQ)


Q: How long does it typically take for Voltaren 75 to start working?

A: The Voltaren 75 tablet is a delayed-release formulation, meaning the release of the active ingredient is slowed. Official information indicates that taking the medication with food may delay the start of absorption by 1 to 4.5 hours. The time it takes for a person to experience noticeable relief is not explicitly detailed in the standard patient labeling, but the design is intended to provide sustained release.

Q: What is the expected duration of action for one tablet of Voltaren 75?

A: The drug is typically prescribed for administration twice daily. This modified-release design is consistent with a dosing schedule intended to provide symptomatic coverage over an extended interval.

Q: Why are the tablets labeled '75'? What does that number mean?

A: The number '75' stamped on the tablets refers to the strength of the medication. It signifies that each tablet contains 75 milligrams (mg) of the active ingredient, which is diclofenac sodium.

Q: Are generic versions of diclofenac 75 mg considered therapeutically equivalent to Voltaren 75?

A: The U.S. Food and Drug Administration (FDA) is responsible for determining if a generic drug is comparable to its brand-name counterpart. Generic formulations of diclofenac sodium delayed-release tablets that receive an AB rating from the FDA are considered therapeutically equivalent to Voltaren 75.

Q: Can Voltaren 75 be taken on an empty stomach?

A: The official administration instructions state that the tablets may be taken with or without food. While taking the tablet with food may delay how quickly the drug is absorbed into the system, regulatory data indicates that the overall amount of drug absorbed is not significantly affected.

Q: What does 'enteric-coated' mean in relation to Voltaren 75 tablets?

A: Voltaren 75 is an enteric-coated (or delayed-release) tablet. This means the tablet has a special coating that prevents it from dissolving until it passes out of the stomach and into the small intestine. This design is primarily intended to help protect the stomach lining from the active ingredient, diclofenac.

Q: Is Voltaren 75 the same as generic diclofenac?

A: Voltaren 75 is the brand name given to this specific medication. The active ingredient in both the branded product and the generic versions is the same substance, diclofenac sodium.

Q: What is the difference between Voltaren 75 and Voltaren over the counter (OTC)?

A: Voltaren 75 is an oral tablet available only by prescription. In contrast, the Voltaren product often sold over-the-counter (OTC) in the U.S. is typically a topical gel containing a lower concentration of diclofenac. The OTC gel is used for localized arthritis pain, while the prescription tablet is intended for systemic conditions.

Q: Is Voltaren 75 used for back pain?

A: Official product information indicates that the drug is prescribed to relieve pain and reduce inflammation associated with various painful syndromes. The medicine is commonly used for symptoms linked to conditions such as osteoarthritis and rheumatoid arthritis.

Q: Is it common to feel dizzy when using Voltaren 75?

A: Official adverse reaction documents list dizziness as a known and commonly reported side effect associated with taking diclofenac. If a person experiences this, regulatory documents advise caution when operating machinery.

Q: Does Voltaren 75 affect blood pressure?

A: Regulatory documents indicate that diclofenac can cause a new onset of high blood pressure (hypertension) or worsen existing high blood pressure. Due to this potential effect, regulatory information indicates that blood pressure monitoring is recommended at the start of treatment and throughout the course of therapy.

Q: Can Voltaren 75 cause drowsiness, making it difficult to drive?

A: Diclofenac is documented to cause effects on the nervous system, including drowsiness (somnolence) and dizziness. Official warnings state that patients experiencing these types of effects are advised not to drive or operate machinery.

Q: What are some signs that Voltaren 75 might not be agreeing with a person's system?

A: Signs of a potential serious reaction include symptoms such as chest pain, difficulty breathing, slurring of speech, or unexplained swelling in the face, ankles, or feet. Other serious signs can involve the digestive system, such as black or tarry stools. These symptoms are considered serious and require prompt medical review.

Q: Is there a maximum time frame for using Voltaren 75 that is described in official documents?

A: Regulatory guidance consistently advises using the lowest effective dose for the shortest duration possible to minimize the potential for serious cardiovascular and gastrointestinal risks. Treatment that continues for more than four weeks is recommended to be re-evaluated periodically by a healthcare professional.

Q: Is Voltaren 75 considered a habit-forming or addictive drug?

A: The active ingredient in Voltaren 75, diclofenac, is not classified as a controlled substance by regulatory authorities. This means the medication is not considered a habit-forming or addictive drug.

Q: What are the differences between Voltaren 75 and Voltaren 100 mg tablets?

A: The main difference between these two products is the dosage strength of the active ingredient. Voltaren 75 contains 75 mg of diclofenac sodium, while the Voltaren 100 mg contains 100 mg. Both are typically formulated as prolonged-release tablets.

Q: Why is it important to have regular check-ups while taking Voltaren 75 long-term?

A: For individuals taking the medication for a prolonged period, regular check-ups are recommended to monitor for potential changes. Specifically, monitoring of liver function, kidney function, and blood pressure is advised due to the known risks associated with long-term NSAID use.

Q: Does Voltaren 75 have a known effect on laboratory blood tests?

A: Official information indicates that use of diclofenac can affect the results of certain laboratory blood tests. This includes tests for liver enzymes (transaminases) and also tests used to measure kidney function.

Q: Can Voltaren 75 cause retention of fluids or swelling in the ankles?

A: Yes, regulatory documents indicate that diclofenac, like other NSAIDs, may cause fluid retention and edema (swelling). This effect can occur and may contribute to or worsen conditions such as heart failure.

Q: What are the signs of a serious skin reaction related to Voltaren 75?

A: Signs of rare but serious skin reactions include the rapid onset of a rash that spreads, blistering, peeling, or loosening of the skin. These symptoms are often accompanied by fever and are considered serious, requiring prompt medical review.

Q: Can Voltaren 75 affect fertility in men or women?

A: Official product information notes that diclofenac may cause a delay or prevention of ovulation in some women. This effect has been associated with reversible infertility in some women. Regulatory information indicates that this effect is likely to resolve after stopping the medication.

How should Voltaren 75 be stored and disposed of?

Storage and Disposal Guidelines

Official guidelines for Voltaren 75 mg delayed-release tablets (diclofenac sodium) focus on maintaining the drug's stability and ensuring safety.

Storage Requirements

The medication must be stored at controlled room temperature, specifically between 20 C and 25 C (68 F and 77 F). The packaging supports a shelf-life of 3 years when stored below 25 C. It is mandatory to keep the medicine out of the reach of children.

Disposal Procedures

The tablets are not on the list of medicines recommended for flushing. If a drug take-back program is unavailable, expired or unused tablets should be disposed of in the household trash. This involves first mixing the medication with an unpalatable substance like dirt or used coffee grounds, placing the mixture in a sealed bag, and then discarding it.

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

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