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Reumacap SR

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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.

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Overview of Reumacap SR

Property Description
Active Ingredient Indometacin (or Indomethacin)
Form Sustained-Release (SR) Capsule
Pharmacological Class Nonsteroidal Anti-Inflammatory Drug (NSAID)
Common Purpose Systemic relief of pain, inflammation, and fever
Origin Synthetic (indoleacetic acid derivative)

What Type of Medicine is Reumacap SR and Its Core Composition?

Reumacap SR is a prescription-only medicinal product classified as a Nonsteroidal Anti-Inflammatory Drug (NSAID), designed for systemic action. The sole active ingredient is Indometacin, a potent compound also frequently referred to as Indomethacin. Indometacin is a synthetically produced substance, specifically identified as an indoleacetic acid derivative, confirming its chemical origin. Indomethacin is used to reduce pain, swelling, and fever, which underscores its clinically recognized function as an anti-inflammatory agent and antipyretic.

Understanding the Sustained-Release (SR) Capsule Formulation

The medication is administered as an oral capsule using a specialized delivery system denoted by "SR," which signifies a Sustained-Release or Extended-Release formulation. This controlled-release capsule is engineered to deliver the Indometacin slowly over an extended period after ingestion, differentiating it from immediate-release oral forms. This pharmaceutical design is a key feature, as the sustained-release approach provides long-acting analgesic and anti-inflammatory effects over multiple hours.

The General Purpose and Anti-Inflammatory Action of Indometacin

The general therapeutic purpose of Reumacap SR is to alleviate discomfort by acting as a strong analgesic and anti-inflammatory agent. This function is achieved by Indometacin's mechanism as a prostaglandin synthesis inhibitor. It works primarily by blocking the cyclooxygenase (COX) enzymes, which are responsible for producing the body’s messengers that initiate pain, swelling, and fever. Consequently, its benefit encompasses the reduction of inflammation, alleviation of pain, and action as an antipyretic, making it useful for conditions where these three aspects coexist.

Regulatory References

  1. MedlinePlus, Indomethacin is used to reduce pain, swelling, and fever
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What side effects are possible with Reumacap SR?

Possible Side Effects and Safety Information

Reumacap SR, which contains the active substance Indomethacin, is associated with a range of documented side effects, primarily involving the Gastrointestinal (GI) tract and the Nervous System.

Common Adverse Reactions

Commonly reported side effects (incidence 3%) include headache, dizziness, drowsiness, nausea, dyspepsia (indigestion), vomiting, abdominal pain, diarrhea, and heartburn. Headaches and mild vertigo may occur during the initial weeks of therapy, which are often transient and may subside with continued use or dose adjustment.

Serious and Clinically Significant Adverse Reactions

The most serious documented safety concerns include the risk of gastrointestinal bleeding, ulceration, and perforation, which can occur at any time, often without warning symptoms, and can be fatal. This risk may be heightened in elderly patients or those with a history of GI disease. The drug also carries a serious warning regarding the increased risk of cardiovascular thrombotic events, including myocardial infarction (heart attack) and stroke, which can be fatal. These risks may increase with the duration of use. Additionally, the drug has the potential for renal toxicity (kidney problems) and hepatotoxicity (liver problems).

Contraindications and Safety Considerations

Reumacap SR is contraindicated in patients with known hypersensitivity to indomethacin or other NSAIDs, those with active GI conditions (such as ulcers, gastritis, or active ulcerative colitis), and in the setting of coronary artery bypass graft (CABG) surgery. It is also classified as unsafe during pregnancy, particularly in the third trimester, due to the risk of premature closure of the fetal ductus arteriosus. Use in patients with pre-existing conditions like severe kidney disease, liver disease, congestive heart failure, or neurological/psychiatric disorders (e.g., epilepsy, Parkinsonism) requires particular caution and monitoring.

Monitoring Requirements

For patients on long-term treatment, regulatory labeling advises regular monitoring of kidney function, liver function, and levels of blood components to detect potential complications early.

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Overdose and Emergency Response

Overdose and When to Seek Help

The official regulatory documentation for Indometacin, the active ingredient in Reumacap SR, describes specific clinical manifestations that may occur following an overdose. Immediate medical attention is required for any suspected overdose.

Overdose may present with gastrointestinal effects, including nausea, vomiting, abdominal pain, and diarrhea. Central Nervous System (CNS) effects are also commonly documented, such as severe headache, confusion, disorientation, lethargy, tinnitus, and tremors. In cases of severe exposure, outcomes can escalate to life-threatening events, including severe CNS depression, seizures, coma, and Acute Renal Failure.

Required Emergency Action

Official guidance mandates that individuals must seek immediate medical attention and contact emergency services or a Poison Control Center at once if an overdose is suspected. This immediate action is critical because no specific antidote is known for Indometacin toxicity.

Management is strictly symptomatic and supportive treatment. Procedures such as Gastric Emptying or the administration of Activated Charcoal may be described to limit absorption. Clinical monitoring is required in a hospital setting to assess and manage vital signs, renal function, and hepatic function.

Population-specific warnings note that elderly patients and those with pre-existing impaired renal function may experience greater severity of adverse effects in an overdose scenario.

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Therapeutic Uses of Reumacap SR

What Reumacap SR Treats: Main Uses and Benefits

Reumacap SR (Indometacin Sustained-Release) is commonly used in situations involving certain distressing symptoms related to inflammatory or irritative states. Its therapeutic relevance involves use in musculoskeletal conditions where short-term symptomatic assistance is needed.

The medication is considered relevant for easing symptom clusters that may become intense or disruptive in conditions characterized by periods of heightened symptoms such as Rheumatoid Arthritis, Ankylosing Spondylitis, Osteoarthritis, and acute episodes like Gouty Arthritis and Tendinitis.

Easing Acute and Chronic Symptom Burden

The sustained-release formulation may be part of symptomatic management to help address symptoms that interfere with daily functioning, such as persistent joint pain, swelling, and morning stiffness. This use contributes to improved comfort during periods of heightened symptoms, and may assist the patient during difficult episodes by easing distress. Reumacap SR is commonly used to help with acute or unstable symptom patterns, for example, addressing flare-ups of chronic conditions, and may assist with functional stability.

Quick Fact: Supports Easing of Stiffness and Joint Swelling

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Eligibility and Restrictions for Use

This section explains the official population eligibility and exclusion rules for Reumacap SR (Indometacin Sustained-Release Capsule) as mandated by regulatory documents.

Contraindicated Populations

Use of this medicine is strictly prohibited in the following groups:

Classification Exclusion Criteria
Allergy/Sensitivity Patients with known hypersensitivity to indometacin or who have experienced allergic-type reactions (e.g., asthma, hives) after taking aspirin or other NSAIDs (Nonsteroidal Anti-Inflammatory Drugs).
Surgical Setting For the treatment of peri-operative pain in the setting of Coronary Artery Bypass Graft (CABG) surgery.
Pregnancy Women starting at 30 weeks gestation and later.
GI Condition Patients with active peptic ulceration or active gastrointestinal bleeding.

Restricted and Conditional Use

Certain populations require special consideration or are advised to avoid use unless benefits clearly outweigh risks:

  • Pediatric Use: Safety and effectiveness for the capsule formulation have not been established in children 14 years of age and younger.
  • Organ Dysfunction: Use should be avoided in patients with severe heart failure or advanced renal disease. Use in patients with hepatic or renal impairment requires close monitoring.
  • Older Adults: The geriatric population should use the medicine with greater care due to increased risk of serious adverse events, including gastrointestinal complications.
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What should I know about interactions with other medicines?

Interactions with other medicines and products

Official regulatory documents identify several classes of medicines that require caution when used concomitantly with Reumacap SR.

Co-administration with anticoagulants (blood thinners) increases the risk of bleeding. The active ingredient in Reumacap SR affects platelet function and may disrupt the effects of drugs like warfarin, requiring careful monitoring.

Simultaneous use with Lithium is associated with an elevated risk of toxicity. Reumacap SR can significantly increase the concentration of Lithium in the bloodstream, which may necessitate a reduction in the Lithium dose or increased clinical observation.

Documented Interaction Agents

Medicine Class / Agent
Anticoagulants (e.g., Warfarin)
Lithium
Diuretics
Antihypertensive drugs (including beta-blockers)
Diflunisal
Aspirin
Sulfonylureas
Probenecid

When combined with diuretics (water pills) or most antihypertensive drugs (such as beta-blockers), Reumacap SR may diminish the blood-pressure-lowering effect of those medications. This may require regular blood pressure assessment and should be considered during treatment.

The concurrent use of other Non-Steroidal Anti-Inflammatory Drugs (NSAIDs), such as Diflunisal or Aspirin, is generally not recommended, as it may heighten the risk of adverse effects without providing additional therapeutic benefit. Additionally, Reumacap SR may interfere with the action of certain antidiabetic agents known as sulfonylureas, which calls for caution and monitoring of blood glucose levels.

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Mechanism of Action

Primary Enzyme Inhibition and Signal Restriction

The mechanism of action of Indometacin (in Reumacap SR) is rooted in its ability to suppress key chemical mediators responsible for nociceptive and inflammatory signaling. The drug acts primarily through the nonselective inhibition of Cyclooxygenase (COX) enzymes—specifically both COX-1 and COX-2 isoforms. This molecular action immediately blocks the conversion of arachidonic acid into various prostaglandins, PGI2, and thromboxanes. This mechanism restricts the generation of eicosanoid mediators, altering the magnitude of subsequent physiological signaling.

Central and Peripheral Pathway Modulation

Indometacin engages distinct physiological pathways: peripherally, it prevents prostaglandins from sensitizing nociceptors (pain receptors); and centrally, it blocks PGE2 synthesis within the hypothalamus, the brain's thermoregulatory center. This combined action initiates or suppresses signaling sequences that modulate pathway activity, resulting in an altered steady state within peripheral nerve endings and the central temperature control system.

Non-Canonical Receptor and Cellular Effects

Beyond its dominant enzyme blockade, the mechanism includes interaction with the central CB1 receptor as a Positive Allosteric Modulator (PAM), influencing endogenous neural signaling pathways. Furthermore, Indometacin directly modulates the inflammatory cascade by inhibiting the function and movement of certain immune cells like polymorphonuclear leukocytes (PMNs), contributing to the modulation of mediator concentration and cellular function at the tissue level.

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Dosage and Administration Information

The following instructions detail the proper administration of Reumacap SR (Indomethacin 75 mg Extended-Release Capsule).

Administration and Dosage

Usage Rule Guidance
Route of Administration Oral (by mouth) only.
Dosing Schedule Chronic conditions (e.g., Rheumatoid Arthritis): 75 mg once daily (one extended-release capsule). Acute conditions (e.g., Painful Shoulder): 75 mg once or twice daily, not to exceed 150 mg to 200 mg per day total.
Timing & Food Take with food, immediately after meals, or with antacids to mitigate gastrointestinal side effects.
Handling The extended-release capsule must be swallowed whole. Do not crush, chew, or break the capsule, as this will compromise the sustained-release mechanism and alter the intended drug release.
Missed Dose If a dose is missed, take it as soon as remembered. If it is almost time for the next dose, skip the missed dose. Do not double the dose to catch up.

Special Population Rule:

  • Elderly Patients: Indomethacin should be used with greater care in the elderly due to the increased possibility of adverse reactions.

The overall use protocol requires employing the lowest effective dosage for the shortest duration consistent with individual treatment goals. For certain acute conditions, such as painful shoulder, treatment is typically discontinued within 7 to 14 days once symptoms are controlled.

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Recent Clinical Evidence

Research evidence / Overview of studies for Reumacap SR

Evidence for Chronic Inflammatory Conditions

Research regarding Indometacin was studied for conditions characterized by fluctuating or episodic manifestations such as Rheumatoid Arthritis, Ankylosing Spondylitis, and Osteoarthritis. These chronic conditions, which involve periods of heightened symptoms, were explored through clinical trials, including Randomized Controlled Trials (RCTs) and comprehensive Systematic Reviews. Studies examined outcomes linked to inflammatory or irritative states, such as measurements of swelling and joint tenderness, alongside patient-reported outcomes describing perceived discomfort.

Long-term retrospective observational studies, with follow-up durations extending for years in some cases, were applied in observational settings examining daily-life functioning for the active ingredient. Research contributes to the broader evidence landscape related to these chronic conditions. The research describes how studies explored only symptomatic relief; the evidence does not examine whether the agent alters the progressive course of the underlying disease.

Evidence for Acute, Short-Term Flares

The evidence base also includes research relevant in trials assessing short-term or episodic symptom patterns, such as those associated with Acute Gouty Arthritis and localized acute conditions like Bursitis or Tendinitis. These studies were conducted during periods of increased symptom activity and was evaluated in adult populations experiencing acute or disruptive episodes.

For acute gout, short-term trials and clinical evaluations research examined outcomes describing episodic or acute changes, such as the speed of symptom resolution and measurements of swelling and heat. Comparative evidence is lacking between the sustained-release capsule and other treatments for short-term, localized conditions.

What is Still Uncertain About Reumacap SR's Research Base

The overall research explores symptomatic relief; studies provide limited insight into whether the agent alters the underlying disease structure or evaluates long-term disease progression. Additionally, comparative evidence is lacking specifically for the sustained-release capsule formulation against its immediate-release counterpart in all indications. Research indicates that the evidence quality varies across studies, and long-term effects are not fully established beyond symptom control.

Key Studies & References

  1. Indomethacin - National Library of Medicine (NLM) StatPearls
  2. Nonsteroidal Anti-Inflammatory Drugs in the Treatment of Gout: A Review
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Frequently Asked Questions (FAQ)

Common questions about Reumacap SR (FAQ)

Q: What are the risks of taking Reumacap SR with alcohol?

According to official product information, taking this medication with alcohol significantly increases the risk of serious gastrointestinal side effects. These risks include stomach bleeding and ulceration, which can occur without warning. Regulatory documents advise caution with concurrent use, and any concerns should be discussed with a healthcare professional.


Q: Is it normal to feel dizzy or sleepy after taking Reumacap SR?

Yes, regulatory information indicates that dizziness and drowsiness are commonly reported side effects. These central nervous system effects may occur, especially when starting the treatment. Any concerns should be discussed with a healthcare professional.


Q: Are there any natural supplements that interact with Reumacap SR?

Official regulatory documents caution against using this medication with agents that interfere with the blood clotting process, known as hemostasis. While specific supplements aren't fully listed, it is important to inform a healthcare professional about all supplements taken, as some may carry an interaction risk.


Q: Is it safe to drive while taking Reumacap SR?

Since Reumacap SR can cause dizziness, drowsiness, and fatigue, official guidance recommends exercising caution when performing activities that require full mental alertness. This includes driving a car or operating heavy machinery. It is important to understand how the medication affects you before engaging in such activities.


Q: Can Reumacap SR affect sleep?

Yes, some regulatory records indicate that insomnia, or difficulty sleeping, is a reported side effect of the active ingredient, Indomethacin. This is typically listed among the central nervous system side effects.


Q: Does Reumacap SR contain lactose or gluten?

The specific inactive ingredients (fillers and binders) used in the Reumacap SR capsule are detailed in the official product description. This is the section where the presence of substances like lactose or gluten are listed.


Q: What should I do if I take too much Reumacap SR?

Regulatory documents on overdosage describe the signs, which can include severe headache, confusion, or unusual drowsiness. If overdosage is suspected, seeking immediate emergency medical attention is advised. Management is typically supportive to treat the symptoms.


Q: Can Reumacap SR be used for headaches or fever?

The active ingredient in Reumacap SR, Indomethacin, is classified as an antipyretic (fever reducer) and an analgesic (pain reliever). Use for specific conditions like common headaches should be consistent with the approved indications and guidance from a healthcare professional.


Q: Is Reumacap SR a controlled substance?

No. Official regulatory scheduling documents confirm that the active ingredient in Reumacap SR is not classified as a controlled substance.


Q: Is it normal for Reumacap SR to cause minor weight gain or loss?

Official regulatory information warns about the risk of fluid retention and edema (swelling). This side effect may present as unexplained weight gain, and patients are advised to monitor for these symptoms. Weight loss is not typically cited as a related effect.


Q: Can Reumacap SR affect the results of blood tests?

Yes, for patients taking this medication long-term, official regulatory labeling advises regular monitoring of blood components. These tests check parameters like kidney function, liver function, and blood cell counts to detect any potential complications early.


Q: Are there any lifestyle changes recommended while taking Reumacap SR?

Official patient counseling information emphasizes the need to be alert for symptoms of serious complications, particularly gastrointestinal bleeding or cardiovascular problems. Prompt reporting of any unusual or serious symptoms to a healthcare provider is important for safe treatment.


Q: Can Reumacap SR cause changes in mood or anxiety?

Official adverse reaction lists for the active ingredient include psychiatric disturbances. These can include symptoms such as nervousness, anxiety, and depression. Significant changes in mood should be reported to a healthcare professional.


Q: What are the typical clinical trials results for Reumacap SR?

The official product labeling includes a summary of the clinical studies that were conducted to support the drug's effectiveness. These sections typically describe the type of participants, the primary goals, and the results that led to the drug's approval for its specific indications.


Q: Why do doctors prescribe Reumacap SR for gout flare-ups?

Regulatory documents indicate that the medication is approved for conditions like acute gouty arthritis. The mechanism of action involves potent inhibition of prostaglandin synthesis, which is effective at rapidly reducing the intense inflammation and pain associated with gout flares.


Q: Can Reumacap SR cause allergic reactions?

Yes, official safety information indicates that Reumacap SR has the potential to cause serious allergic-type reactions, including anaphylaxis. Patients who have a known hypersensitivity to this medication or other NSAIDs are strictly advised against using it.

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How should Reumacap SR be stored and disposed of?

How to Store and Dispose of Reumacap SR

Reumacap SR (Indomethacin Extended-Release capsules) must be stored according to specific regulatory requirements to maintain its stability.


Official Storage Conditions

Condition Requirement
Temperature Store at Controlled Room Temperature (typically 20 C to 25 C / 68 F to 77 F).
Protection Must be protected from moisture. Avoid excessive heat and freezing temperatures.
Container Keep the medicine in a tightly closed container.
Child Safety Store the product out of the sight and reach of children and pets.

Disposal Instructions

Unused or expired capsules should be disposed of properly. The recommended procedure is to take the medicine to an official drug take-back program. If a program is unavailable, dispose of the product by mixing it with an undesirable substance and sealing it in a bag before placing it in the household trash. Do not flush the capsules down the toilet or pour them into a drain unless instructed to do so by an official authority.

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

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