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Arthrotec 75

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Arthrotec 75

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Medically reviewed

Marina Burgos

Last updated on 10/01/2026

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.

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Overview of Arthrotec 75

Property Description
Active ingredient Diclofenac Sodium and Misoprostol
Form Delayed-release oral tablet
Pharmacological class NSAID and Prostaglandin Analog Combination
Common use Chronic inflammatory joint pain management
Origin Synthetic

Arthrotec 75 is a specialized, prescription-only medicine designed as a fixed-dose combination product containing two distinct synthetic active ingredients: Diclofenac Sodium and Misoprostol. It is classified pharmacologically as a Nonsteroidal Anti-inflammatory Drug (NSAID) and Prostaglandin Analog Combination. Clinical recognition supports the rationale of this formulation: combining the anti-inflammatory agent with the gastroprotective agent addresses the risk of serious gastrointestinal events associated with sustained NSAID use. This unique formulation is clinically recognized for its targeted approach to managing chronic joint pain while protecting the stomach lining.


1. Defining Arthrotec 75: Combination and Composition

This medication is presented as a sophisticated, delayed-release tablet structured for systemic use. Its key differentiating feature is its physical design: the tablet contains an inner core with 75 milligrams of Diclofenac, which is enteric-coated to resist stomach acid, surrounded by an outer mantle containing Misoprostol. The Misoprostol component is released first to establish early gastroprotection.

This fixed-dose strategy sets Arthrotec 75 apart from regimens that require taking separate pills for inflammation and gastric protection. This product is designed for patients who need continuous pain relief but also require dedicated defense for their digestive tract.


2. What Does the "75" Indicate in Arthrotec 75?

The numerical designation "75" in the product name refers precisely to the concentration of the Diclofenac component, which is 75 milligrams per tablet. This dose of the NSAID is consistently paired with 200 micrograms of the Misoprostol component. The existence of different concentrations (e.g., Arthrotec 50) allows the therapeutic dose of the anti-inflammatory agent to be matched to the individual's needs, while the core principle of combination therapy—the pairing with the gastroprotectant—remains constant. The tablet's distinctive marking, often engraved with a "75" and the manufacturer's code, helps healthcare providers identify the strength.

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What side effects are possible with Arthrotec 75?

Possible Side Effects and Safety Information

Official regulatory documents emphasize specific safety risks associated with Arthrotec 75, which contains diclofenac and misoprostol.

Serious Adverse Reactions and Safety Warnings

Serious, potentially life-threatening risks are highlighted with regulatory warnings:

  • Cardiovascular Thrombotic Events: An increased risk of serious events such as myocardial infarction (heart attack) and stroke, which can be fatal. This risk may increase with longer duration of use.
  • Gastrointestinal Events: A heightened risk of serious gastrointestinal adverse events, including bleeding, ulceration, and perforation of the stomach or intestines. These events can occur without warning symptoms and may be fatal.
  • Fetal Toxicity (Misoprostol Component): The medicine is strictly contraindicated in pregnant women as the misoprostol component can cause severe harm to the fetus, including abortion, premature birth, birth defects, and uterine rupture. Women of childbearing potential must use effective contraception during treatment.

Common and Other Adverse Reactions

Adverse reactions are officially classified by the body system affected and how often they occur.

The most frequent side effects, classified as Very Common or Common, primarily involve the gastrointestinal system and may include:

  • Abdominal pain
  • Diarrhea
  • Dyspepsia (indigestion)
  • Nausea
  • Flatulence
  • Headache
  • Vomiting
  • Dizziness

Less common, serious adverse reactions affecting other body systems include severe skin reactions (such as Stevens-Johnson Syndrome), hepatotoxicity (liver damage), and renal toxicity (kidney damage).

Safety-Related Restrictions

Based on the documented risks, the medicine is contraindicated (prohibited) for specific patient groups and uses, including:

  • During pregnancy.
  • For the treatment of peri-operative pain in the setting of Coronary Artery Bypass Graft (CABG) surgery.
  • In patients with established congestive heart failure (NYHA Class II-IV) or established ischemic heart disease, peripheral arterial disease, or cerebrovascular disease.

The lowest effective dose should be used for the shortest possible duration to minimize the potential for serious risk.

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Overdose and Emergency Response

Overdose and when to seek help

An overdose of Arthrotec 75 involves overexposure to both Diclofenac (an NSAID) and Misoprostol (a prostaglandin analog). Documented signs of overdosage may include lethargy, drowsiness, confusion, vomiting, and epigastric pain from the Diclofenac component, alongside sedation, tremor, fever, hypotension, and bradycardia from the Misoprostol component.

Severe or life-threatening manifestations documented in regulatory documents include coma, convulsions, acute renal failure, and significant gastrointestinal complications such as bleeding and perforation. For women who are pregnant, a specific risk of uterine rupture, abortion, or premature birth is associated with the Misoprostol component.

Immediate medical attention is required for any suspected overdose. Emergency services must be contacted immediately if the affected person has collapsed, had a seizure, has trouble breathing, or cannot be awakened.

Overdose management is symptomatic and supportive, as official labeling states that no specific antidotes are known for either active component. Procedures such as gastric lavage, induced diuresis, and activated charcoal administration may be considered by medical professionals based on the amount ingested and the patient's status. Consultation with a Poison Control Center is recommended to determine the latest official management protocols.

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Therapeutic Uses of Arthrotec 75

This medication is commonly used to help manage the symptoms of chronic inflammatory conditions, while providing support for symptom management.


Symptomatic Management of Chronic Inflammatory Arthritis

This medication is generally applied for conditions characterized by periods of heightened symptoms, specifically Osteoarthritis (OA) and Rheumatoid Arthritis (RA). It assists in addressing symptom clusters that include persistent joint pain, swelling, and stiffness. Applied in scenarios where additional management of discomfort is required, the medicine provides supportive relief that may help with maintaining functional stability during these disruptive, recurrent episodes.


Gastroprotection for High-Risk NSAID Users

Arthrotec 75 is generally applied for adult patients who require continuous, long-term anti-inflammatory relief but are simultaneously at a high clinical risk of developing stomach and duodenal ulcers. This dual-action approach supports the patient during difficult episodes by easing distress related to gastric and duodenal ulceration. This is applied in settings marked by temporary physiological imbalance, relevant when supportive symptom management is appropriate.

Quick Fact: Therapeutic Focus is on Chronic Joint Pain and Prophylaxis for patients needing sustained anti-inflammatory support.

Regulatory References

  1. NIH DailyMed overview of diclofenac sodium and misoprostol tablets
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Eligibility and Restrictions for Use

Arthrotec 75 is officially labeled for use in adult patients (18 years and older) who require long-term treatment for conditions like Osteoarthritis or Rheumatoid Arthritis and are simultaneously at a high risk of developing NSAID-induced stomach ulcers.

Use is absolutely contraindicated for several populations. These include pregnant women due to the abortifacient risk of the misoprostol component, and patients with a history of hypersensitivity to diclofenac, misoprostol, or other NSAIDs (such as aspirin). The medicine must not be used in individuals with active peptic ulcers or severe organ failure, specifically severe renal impairment, severe hepatic impairment, or uncontrolled severe heart failure. It is also prohibited for pain management following Coronary Artery Bypass Graft (CABG) surgery.

The medicine is contraindicated in children and adolescents under 18. Women of childbearing potential must be fully informed of the risks and use effective contraception to be eligible. Older adults and patients with moderate organ impairment require special caution and close monitoring, with regulators advising the use of the lowest effective dose for the shortest duration.

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What should I know about interactions with other medicines?

The official interaction profile for Arthrotec 75 is complex, reflecting constraints imposed by both the Diclofenac and Misoprostol components. Regulatory authorities classify several combinations as strictly contraindicated, including use during pregnancy, for perioperative pain in CABG surgery, in cases of active gastrointestinal bleeding, or with a history of NSAID hypersensitivity.

Interactions are primarily divided into Pharmacodynamic (PD) and Pharmacokinetic (PK) effects. The PD domain includes a heightened risk of serious bleeding when co-administered with Anticoagulants, Antiplatelets, SSRIs, or SNRIs. Furthermore, co-use with ACE Inhibitors, ARBs, or Diuretics may diminish the antihypertensive effect and can lead to deterioration of renal function in elderly or volume-depleted patients.

PK interactions involve the metabolism of Diclofenac by CYP2C9; inhibitors of this enzyme may increase the drug’s plasma exposure, while inducers may decrease it. Co-administration may also increase serum concentrations of drugs like Lithium and Digoxin, requiring mandated therapeutic monitoring. Specific timing rules apply to Pemetrexed, which requires a four-day dose avoidance window in patients with moderate renal impairment. Finally, Magnesium-containing antacids and alcohol are restricted due to documented risks of diarrhea exacerbation and increased gastrointestinal bleeding, respectively.

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Mechanism of Action

How Arthrotec 75 Works

Modulating Chemical Signals via Enzyme Inhibition

This component of the drug acts as a non-selective inhibitor of cyclooxygenase (COX) enzymes. By blocking these key molecular targets, the drug suppresses the synthesis of prostaglandins, which are central chemical mediators in the body's physiological response systems. This interruption of the eicosanoid pathway reduces the downstream signaling associated with the local release of pro-inflammatory mediators.

Activating Protective Gastric Receptors

The second component functions as a direct agonist by activating specific Prostaglandin E2 receptors (EP3) on the cells lining the stomach. This mechanistic action initiates a signal cascade that actively inhibits the release of gastric acid while simultaneously stimulating the production of protective substances, such as mucus and bicarbonate, and increases the presence of local barrier factors.

Mechanistic Mitigation and Balanced Action

The drug exerts its effect through a combination of actions where the systemic inhibition of COX enzymes (which compromises native gastric protection) is counterbalanced by the local receptor activation mechanism in the stomach. This combined action ensures that the modulation of systemic physiological signaling is achieved while the activity of the gastrointestinal system is maintained despite the reduction in native prostaglandin synthesis.

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Dosage and Administration Information

Arthrotec 75 is a combination medication containing 75 mg of diclofenac sodium (a Non-Steroidal Anti-Inflammatory Drug or NSAID) and 200 mcg of misoprostol (a gastrointestinal mucosal protectant). It is typically prescribed for the treatment of signs and symptoms of osteoarthritis or rheumatoid arthritis in patients at high risk of developing NSAID-induced ulcers.

General Administration

  • Always take Arthrotec 75 exactly as prescribed by your healthcare provider. Use the lowest effective dosage for the shortest duration necessary to achieve treatment goals.
  • Swallow the tablet whole with food and a full glass of water. Do not chew, crush, or dissolve the tablet, as this can affect the delayed-release mechanism of the diclofenac component and the protection offered by the misoprostol component.
  • Taking the medication with food can help minimize the potential for stomach upset and diarrhea related to the misoprostol component.

Dosage for Arthrotec 75

For both Osteoarthritis and Rheumatoid Arthritis, the usual prescribed dosage for Arthrotec 75 is one tablet (75 mg diclofenac/200 mcg misoprostol) taken two times daily. The total daily dosage of diclofenac should generally not exceed 150 mg for osteoarthritis and 200 mg for rheumatoid arthritis.

Condition Arthrotec 75 Regimen Daily Dose (Diclofenac) Daily Dose (Misoprostol)
Osteoarthritis One tablet twice daily* 150 mg 400 mcg
Rheumatoid Arthritis One tablet twice daily* 150 mg 400 mcg

*Note: This twice-daily regimen provides less ulcer protection than a thrice-daily Arthrotec 50 regimen, and a healthcare professional should determine if it is appropriate for the individual patient.

Important Considerations

Do not take Arthrotec 75 with magnesium-containing antacids, as they may worsen misoprostol-induced diarrhea. If you miss a dose, take it as soon as you remember, unless it is almost time for your next scheduled dose. Do not take a double dose to compensate for a missed dose.

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Recent Clinical Evidence

Arthrotec 75: Recent Clinical Evidence

Evidence for Symptom Management in Chronic Inflammatory Arthritis

Research has examined the activity of this combination medicine in conditions characterized by fluctuating or episodic manifestations, such as Osteoarthritis (OA) and Rheumatoid Arthritis (RA). Studies focused on adult populations and used a randomized controlled design. This involved short-term trials applied in research contexts involving functional limitations. The research primarily examined outcomes related to physical discomfort, including joint pain, morning stiffness, and patient-reported outcomes describing perceived discomfort. Studies monitored how symptoms evolved in the observed populations, and findings describe patterns observed in the studies in relation to the anti-inflammatory component alone. Research provides insight into short-term changes, but evidence remains limited and heterogeneous regarding long-term outcomes and the durability of measured changes.

Evidence for Gastrointestinal Ulcer Prophylaxis

The combination product was evaluated in studies for its ability to address outcomes related to systemic or functional imbalance linked to inflammatory or irritative states within the digestive tract. Research describes the use of randomized controlled trials (RCTs) and long-term observational settings to measure the prevention of ulcers. Studies focused on populations considered at a high clinical risk for developing digestive tract complications from nonsteroidal anti-inflammatory drug (NSAID) use, such as older adults or those with a history of prior ulcers. Findings indicate that studies reported a consistent pattern of lower measured ulcer incidence in the upper digestive tract (gastric and duodenal) when compared to taking the anti-inflammatory component alone. The evidence contributes to the broader landscape of understanding symptom patterns in high-risk groups. However, trials were associated with high rates of patient withdrawal due to gastrointestinal-related adverse effects; evidence is also limited regarding protection for the lower gastrointestinal tract.

Study Duration and Long-Term Follow-up

The majority of studies exploring how symptoms change over time have concentrated on short-to-intermediate follow-up durations, typically lasting up to a few months. Research provides context but not individual predictions about long-term use. Data show patterns related to symptom control and ulcer prevention over these defined time intervals. However, certainty remains low, and the long-term effects of sustained use are not fully established. Information on long-term outcomes is limited, and the results apply only to the populations studied under the specific conditions of the trials.

Research in Special Populations

The medicine was studied in older adult patients who are often included in the high-risk populations for NSAID-related complications. Research monitored the observed patterns of ulcer prevention within this age group. However, certain groups, such as the pediatric population, were not included in clinical studies. Data for these groups, including pregnant patients, remain insufficient, and the long-term effects for these populations are not fully established.

Evidence Gaps and Research Uncertainty

Findings were mixed across studies, particularly in how comparable the findings were across all trial groups. Certainty remains low regarding the full scope of long-term effects, as follow-up durations were limited in the primary efficacy studies. Data for certain groups remain insufficient, and research continues to explore outcomes related to long-term physiological strain. The evidence derived from research provides insight into short-term changes but does not determine whether an individual will respond similarly over extended periods.

Key Studies & References

  1. NIH DailyMed overview of diclofenac sodium and misoprostol tablets
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Frequently Asked Questions (FAQ)

Common questions about Arthrotec 75 (FAQ)


Q: Is it common to get diarrhea when starting Arthrotec 75?

Official regulatory documents indicate that diarrhea is a very common adverse reaction reported by patients taking this medication. It occurred in more than 2% of patients during clinical trials. Official administration instructions require taking the medication with food, which is intended to help minimize the potential for stomach upset related to the misoprostol component.


Q: Does Arthrotec 75 affect blood pressure?

According to official information, this medication, which contains an NSAID, may lead to the onset of new high blood pressure or worsen existing high blood pressure. It is also associated with fluid retention (edema). Official labeling suggests monitoring blood pressure regularly, as the medicine may affect blood pressure levels.


Q: Is Arthrotec 75 safe for elderly patients, such as those over 65?

Regulatory documents state that elderly patients should be closely monitored when using this medication, as the risk of experiencing serious adverse reactions is potentially greater in this population. The monitoring may include checking for severe effects on the kidneys, heart, or liver.


Q: How quickly does Arthrotec 75 start to relieve joint pain?

Official labeling, which is based on research, does not specify a precise time frame for when a patient will first feel pain relief. The anti-inflammatory effect begins after the drug is absorbed, but a clear onset time is not stated. The official label advises that dosage adjustments, if necessary, should be based on observation of the individual patient's response.


Q: Is Arthrotec 75 designed for short-term pain relief or long-term management?

Official indications state that Arthrotec 75 is intended for both the acute and chronic (long-term) use in managing the signs and symptoms of osteoarthritis and rheumatoid arthritis. Official labeling indicates that even for chronic use, the medication should be taken at the lowest effective dose for the shortest duration necessary.


Q: What are the key differences between Arthrotec 75 and diclofenac alone (e.g., Voltaren)?

Arthrotec 75 is a unique fixed-dose combination product containing two active ingredients: diclofenac (an NSAID for pain and inflammation) and misoprostol (a gastro-protectant). The key difference is the addition of misoprostol, which is intended to reduce the risk of serious stomach ulcers and bleeding associated with taking diclofenac alone.


Q: What conditions qualify someone as being at "high risk" for ulcers, making Arthrotec 75 appropriate?

While the official documentation states the medication is for patients at high risk of NSAID-induced ulcers, it does not provide a formal list of qualifying conditions. However, regulatory warnings indicate the risk increases in patients who are older, take higher doses, use the drug for a longer time, take concurrent aspirin or anticoagulants, or have a prior history of GI bleeding or ulcers.


Q: What type of arthritis is Arthrotec 75 officially approved to treat?

The medicine is officially indicated for the treatment of the signs and symptoms of osteoarthritis (OA) and rheumatoid arthritis (RA). These are the specific types of chronic inflammatory joint conditions addressed in the official product labeling.


Q: Does Arthrotec 75 cure arthritis or just help with the symptoms?

According to regulatory sources, this medication is indicated for the symptomatic treatment of arthritis. This means it is used to help manage the signs and symptoms, such as pain and inflammation, but it does not cure the underlying condition.


Q: Is the Diclofenac component in Arthrotec an opioid?

No, the diclofenac component of the drug is not an opioid or a narcotic. It is classified pharmacologically as a Non-Steroidal Anti-Inflammatory Drug (NSAID). Its action involves reducing chemical mediators associated with pain and inflammation.


Q: Can Arthrotec 75 cause unusual vaginal bleeding or menstrual changes?

Yes, official adverse reaction reports indicate that abnormal vaginal bleeding and intermenstrual bleeding are potential side effects of the medication. This is likely related to the misoprostol component. Postmenopausal vaginal bleeding is also a reported adverse reaction.


Q: What are the signs of liver problems related to taking Arthrotec 75?

Although rare, severe liver problems (hepatotoxicity) have been reported. Signs that a patient might observe could include jaundice (a yellowing of the skin or eyes). Official documents also note that clinically significant elevations of liver enzymes are sometimes observed in laboratory tests.


Q: Is there a risk of a serious skin rash while taking Arthrotec 75?

Yes, regulatory warnings confirm that serious, sometimes fatal, skin reactions have been reported with this medicine. These include rare but severe conditions like Stevens-Johnson syndrome (SJS), exfoliative dermatitis, and toxic epidermal necrolysis.


Q: Can Arthrotec 75 cause changes in mood, like depression or anxiety?

Yes, reports of adverse reactions include mental or mood changes such as depression. Other reported psychiatric reactions listed include confusion, dream abnormalities, and nervousness.


Q: Does taking Arthrotec 75 long-term lead to weight gain or fluid retention?

The NSAID component is associated with fluid retention and edema (swelling). This effect can potentially lead to an increase in weight. The official warning states this may lead to new or worsened high blood pressure.


Q: Can Arthrotec 75 make me dizzy or drowsy?

Official product information lists dizziness as a common adverse reaction, and drowsiness is also a reported side effect. Because dizziness and drowsiness are reported side effects, caution is generally advised when operating hazardous machinery.


Q: Is Arthrotec 75 safe for people who have kidney disease?

According to regulatory sources, Arthrotec 75 is strictly prohibited (contraindicated) for people with severe renal failure (severe kidney disease). Patients with pre-existing mild to moderate kidney impairment require close monitoring due to the risk of reduced kidney function.


Q: Is Arthrotec 75 safe to take if I am currently breastfeeding?

No, official product information states that the medicine is strictly contraindicated during lactation (breastfeeding).


Q: Does Arthrotec 75 interact with any common blood clotting disorders?

Diclofenac, the anti-inflammatory component, can affect the body’s ability to clot blood by inhibiting platelet aggregation (the clumping of cells that form a clot). Regulatory information indicates that patients with underlying bleeding or blood clotting disorders typically require close monitoring.


Q: Does Arthrotec 75 work better if you take it on an empty stomach?

The official instruction is to swallow the tablet whole with food and a full glass of water. This directive is provided to minimize stomach upset and diarrhea, which are common side effects, and is not related to making the drug work 'better'.


Q: Can I take Tylenol (acetaminophen) at the same time as Arthrotec 75?

There is no specific, dedicated interaction warning for this combination, but both drugs carry a risk of liver toxicity (hepatotoxicity). Because both drugs carry a risk of liver toxicity, caution is necessary to ensure the maximum daily dose of acetaminophen is not exceeded when combining treatments.


Q: Does using Arthrotec 75 affect lab results for kidney or liver function tests?

Yes, official adverse event reports indicate that use of the drug may cause changes in certain lab results. This includes clinically significant elevations of liver enzymes (such as SGOT or SGPT) and changes observed in renal function tests.


Q: Should I worry about sun exposure or sunburn while using Arthrotec 75?

Yes, official adverse reaction reports for this medicine indicate that increased sensitivity of the skin to sunlight (photosensitivity) is a potential side effect of the diclofenac component.


Q: Can Arthrotec 75 be taken with antacids, and and if so, what kind?

Magnesium-containing antacids are specifically restricted because they may worsen the diarrhea caused by the misoprostol component. For the use of antacids other than those containing magnesium, patients generally need to seek guidance from a healthcare professional.


Q: What is the role of Arthrotec 75 in treating gout?

Official regulatory documents state that the medication is only indicated for the treatment of the signs and symptoms of osteoarthritis and rheumatoid arthritis. It is not listed for the treatment of gout.


Q: Does Arthrotec 75 affect fertility in men or women?

Official adverse event reports indicate that decreased female fertility is a reported reaction associated with the medication.


Q: Does the drug cause blurred vision or changes in hearing?

Official reports of adverse reactions include hearing impairment (such as tinnitus or ringing in the ears) and visual changes. Patients should be aware of these potential effects.


Q: Can Arthrotec 75 be used for general body aches or menstrual cramps?

No, according to the official regulatory indications, the medicine is only approved for the treatment of the signs and symptoms of osteoarthritis and rheumatoid arthritis.


Q: Are there any restrictions on driving or operating machinery while taking Arthrotec 75?

Regulatory documents advise that caution should be exercised when driving or operating hazardous machinery. This warning is due to the reported adverse effects of dizziness and drowsiness associated with the medication.


Q: Is it possible to have an allergic reaction to Arthrotec 75 even if I've taken NSAIDs before?

Yes. The medication is strictly contraindicated (prohibited) for patients who have a history of allergic-type reactions, such as asthma, hives, or other allergic symptoms, after taking aspirin or other NSAIDs.

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How should Arthrotec 75 be stored and disposed of?

Official Storage and Disposal Requirements

Arthrotec 75 (diclofenac sodium and misoprostol) must be stored and handled strictly according to regulatory labeling to ensure stability and safety.

Storage Conditions

The medication must be kept at Controlled Room Temperature, defined as 20 C to 25 C (68 F to 77 F). The regulatory label instructs that the product must be kept from freezing and stored away from excessive heat, moisture, and direct light. To maintain stability, the tablets must be stored in the original package.

Requirement Official Instruction
Child Safety Keep out of the sight and reach of children.
Environmental Protection Do not throw away unused medicine via wastewater or household waste.
Disposal Ask a pharmacist how to properly dispose of medicine no longer needed.

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

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