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Pentasa Prolonged Release

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Pentasa Prolonged Release

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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 Pentasa Prolonged Release

Quick Facts

Property Description
Active ingredient Mesalazine (5-Aminosalicylic Acid, 5-ASA)
Form Prolonged-release granules, tablets, enemas, and suppositories
Pharmacological class Aminosalicylate (locally acting anti-inflammatory)
General purpose Reducing chronic inflammation and swelling in the intestinal lining
Origin Synthetic derivative

What Type of Medicine is Pentasa Prolonged Release?

Pentasa Prolonged Release is a prescription medicine containing the active ingredient Mesalazine, which is also chemically known as 5-Aminosalicylic Acid (5-ASA). It belongs to the aminosalicylate class, a specialized pharmacological group of agents used for their potent, localized anti-inflammatory action within the digestive tract. This preparation is a synthetic, single-ingredient product designed to suppress the inflammatory process in the bowel lining. The overall approach of using Mesalazine for localized therapy is based on its direct anti-inflammatory action specifically where irritation occurs.

Composition and the Specialized Prolonged-Release System

The medication is distinctly characterized by its unique Prolonged-release formulation, a specialized feature designed to ensure the Mesalazine is delivered and released slowly and uniformly throughout the entire length of the small and large intestine. It is available in various dosage forms, including oral tablets and granules, in addition to rectal preparations like suppositories and enemas. The oral forms utilize specialized sustained-release technology—involving the coating of Mesalazine microgranules with materials such as ethylcellulose—to ensure the compound is continuously distributed, an engineering approach that differentiates it from formulations that rely on pH-specific dissolution.

General Purpose and Foundational Benefit

The foundational benefit of Mesalazine stems from its direct action as a locally acting anti-inflammatory agent that modulates the excessive local immune response in the intestinal wall. Mesalazine is recognized for its mechanism of action in reducing inflammation. This means the drug is recognized for its effectiveness in calming the underlying source of chronic intestinal irritation and swelling. By intervening in the biochemical cascade responsible for chronic irritation, the preparation serves its primary purpose of soothing and protecting the intestinal lining, which is necessary for maintaining the integrity of the gastrointestinal tract.

Regulatory References

  1. World Health Organization (WHO)
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What side effects are possible with Pentasa Prolonged Release?

Possible Side Effects and Safety Information

The official safety profile of Mesalazine (the active ingredient in Pentasa Prolonged Release) is categorized by frequency and the body system affected, as documented in regulatory prescribing information.

Frequency-Classified Adverse Reactions

Adverse effects are officially grouped based on their reported frequency, ranging from common to very rare.

Classification Examples of Documented Reactions
Common Headache, diarrhea, abdominal pain, nausea, vomiting, and rash.
Uncommon Myocarditis, pericarditis, pancreatitis, and joint pain (arthralgia).
Rare Dizziness, peripheral neuropathy, and increased sensitivity to sunlight (photosensitivity).

Serious Adverse Reactions

Regulatory documents highlight rare but clinically important reactions. These include a specific reaction termed Acute Intolerance Syndrome, which can present with cramping, acute abdominal pain, and bloody diarrhea, often appearing shortly after the initiation of therapy. Other documented serious reactions include organ-specific hypersensitivity involving the heart (myocarditis, pericarditis), liver (hepatitis), and kidneys (nephritis), as well as severe skin reactions like Stevens-Johnson Syndrome (SJS).

Population and Safety Constraints

The official label advises caution for individuals with known impaired renal function or impaired hepatic function. Specific safety notes also exist concerning the potential for this medicine to interfere with certain laboratory tests, such as those measuring urinary normetanephrine. Furthermore, the medicine has been documented to cause a reddish-brown discoloration of urine when it comes into contact with hypochlorite bleach.

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Overdose and Emergency Response

Overdose and When to Seek Help

The official regulatory profile for Mesalazine (Pentasa Prolonged Release) overdose is defined by the risk of salicylate toxicity and the explicit need for immediate supportive care.

In the event of suspected overdose or ingestion of excessive amounts, immediate medical attention is required, and individuals must contact emergency services.

Manifestations and Outcomes Officially Documented Regulatory Actions
Systemic Symptoms: Vomiting, hyperventilation, dehydration, headache, confusion, and abdominal pain. Urgent Action: Seek immediate medical attention.
Severe Physiological Effects: Acid-base balance disorder, hypoglycemia, pulmonary edema, and potential deterioration of renal function. Mandatory Monitoring: Hospitalisation and monitoring of renal function and acid-base balance is recommended.
Antidote Status: No specific antidote is known. Management: Treatment is symptomatic and supportive, including establishing volume and electrolyte balance.

Special Consideration: The potential for adverse reactions, including deterioration of renal function, may be greater in individuals with existing impaired renal function following an overdose.

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Therapeutic Uses of Pentasa Prolonged Release

What Pentasa Prolonged Release Treats: Main Uses and Benefits

Targeting Active Inflammation in Ulcerative Colitis

This product is commonly used for conditions involving inflammatory or irritative processes, such as mild-to-moderate Ulcerative Colitis (UC). This therapeutic domain supports the body during a phase when functional stability becomes affected by chronic inflammation in the colon and rectum, playing a role in maintenance of remission and may assist with managing symptoms associated with active disease.

The primary uses focus on the symptomatic management of symptoms related to active UC, including rectal bleeding, abdominal cramping and pain, and sudden changes in bowel habits.

Resolving Distressing Acute Symptoms

It helps address symptom clusters that may become intense or disruptive during a flare-up, which are symptoms that interfere with daily functioning. The use of this medicine provides support that helps ease the overall symptom burden during these difficult episodes.

Sustaining Long-Term Remission and Managing Recurrence

Furthermore, this medication is relevant in conditions characterized by periods of heightened symptoms by playing a role in maintenance of remission. This use contributes to improved comfort during periods of heightened symptoms and may assist with maintaining functional stability, playing a role in managing symptoms associated with a recurrence.


Quick Fact: Relief for Gastrointestinal Distress

This medicine is applied across domains where additional symptomatic support is needed to manage symptoms that interfere with daily comfort, particularly disturbances related to urgency and frequency of bowel movements.

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Eligibility and Restrictions for Use

Eligibility for Pentasa Prolonged Release: Official Regulatory Information

Eligibility for Pentasa Prolonged Release (mesalamine) is strictly defined by regulatory authorities based on patient profile and pre-existing conditions. The primary eligible population includes adults with mildly to moderately active Ulcerative Colitis.

Absolute Contraindications (Must Not Use)

Use is contraindicated for any patient with a known or suspected hypersensitivity to mesalamine, other salicylates (like aspirin), or any component of the formulation. The medicine is also formally contraindicated in patients with severe hepatic impairment or severe renal impairment.

Age and Organ Function Restrictions

  • Pediatric Use: Safety and efficacy are typically not established for children under five or six years of age. For approved pediatric use, minimum age and/or weight thresholds (24 kg) apply to certain formulations.
  • Conditional Use: Patients with pre-existing but non-severe impaired hepatic or renal function, chronic asthma, or a known allergy to sulfasalazine must use the medicine with caution and require close clinical monitoring.
  • Pregnancy and Lactation: Use is conditional, generally authorized only when the potential benefit to the mother outweighs the possible risk to the fetus or nursing infant.
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What should I know about interactions with other medicines?

Interactions with other medicines and products

This section outlines the officially documented interaction patterns for Mesalazine (the active ingredient in Pentasa Prolonged Release), based strictly on government regulatory sources like the U.S. FDA and European SmPCs. No medicinal products are formally classified as contraindicated due to drug-drug interaction risk.


Documented Interaction Patterns

The most clinically significant interactions are related to shared risks of adverse effects, necessitating specific monitoring during co-administration.

Interacting Substance/Class Officially Documented Interaction Pattern
Non-Steroidal Anti-Inflammatory Drugs (NSAIDs) Increased risk of nephrotoxicity (kidney damage).
Azathioprine or 6-Mercaptopurine (Thiopurines) Increased risk of myelosuppressive effects (blood disorders).
Other Nephrotoxic Agents May increase the risk of renal reactions.
Warfarin Weak evidence suggests Mesalazine might decrease the anticoagulant effect of warfarin.

Interaction-Related Monitoring and Constraints

Co-administration with Nephrotoxic Agents requires monitoring for changes in renal function, as the risk of adverse renal reactions is greater. Similarly, concurrent use with Thiopurines requires monitoring of blood cell counts due to the increased risk of myelosuppression.

Mesalazine may also interfere with certain laboratory tests, potentially causing spuriously elevated results when measuring urinary normetanephrine. Additionally, Mesalazine may cause urine to turn a red-brown color upon contact with sodium hypochlorite bleach.

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Mechanism of Action

The mechanism of action for Mesalazine is purely local and multi-faceted, defined by its ability to modulate the biochemical cascades associated with chronic inflammation within the intestinal wall.

Dual Inhibition of Inflammatory Enzymes (COX and LOX)

The primary action involves Mesalazine directly inhibiting key enzymes in the Arachidonic Acid Pathway: Cyclooxygenase (COX) and 5-Lipoxygenase (5-LOX). This blocks the cellular synthesis of pro-inflammatory mediators, including prostaglandins and leukotrienes. This process initiates a physiological consequence by immediately limiting the chemical signals associated with increased vascular permeability and edema.

️ Modulation of Immune Signals and Genetic Triggers

The molecule also engages in signal transduction modulation by suppressing the activation of the transcription factor Nuclear Factor-kappa B (NF-kappaB). This action effectively downregulates the genetic instructions for producing numerous pro-inflammatory cytokines and chemokines. This action modulates the function of the local immune system by reducing the recruitment and activity of immune cells into the mucosal tissue.

Chemical Scavenging and Epithelial Stress Reduction

Mesalazine acts as an antioxidant, directly scavenging Reactive Oxygen Species (ROS) and free radicals that are generated during the inflammatory process. This chemical neutralization is the mechanism by which it reduces oxidative stress on epithelial cells. The resulting physiological effect is the reduction of free-radical induced epithelial stress.

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Dosage and Administration Information

Instruction Map: How to use Pentasa Prolonged Release — Official Administration Guidelines

Administration Scope Official Instruction
Route of administration The medicine is approved for Oral administration (capsules, tablets, or granules) and Rectal administration (suppositories or enemas).
Dosing schedule The dosage is differentiated by the disease phase: up to 4 g mesalazine daily is authorized for the induction of remission in active disease, while a dosage of 2 g daily is common for long-term maintenance.
Timing in relation to meals The oral extended-release capsules may be taken with or without food.
Preparation requirements Oral capsules and tablets must be swallowed whole and must not be crushed or chewed to preserve the prolonged-release properties. As an alternative, the contents of the capsules can be opened and sprinkled onto a spoonful of applesauce or yogurt for immediate, unchewed consumption. Granule sachets are similarly administered with water, juice, or yogurt.
Age-group administration rules Pediatric dosing (ages 6 and above) is weight-based and should not exceed the maximum adult daily dose. It is also instructed that renal function must be evaluated prior to initiating therapy and periodically throughout treatment.
Missed-dose rules If a dose is missed, it should be skipped if it is almost time for the next scheduled dose, and a double dose must not be taken to make up for the omission.
Special procedural conditions Adequate fluid intake is instructed during the course of treatment.

Instruction Classifications (High-Level)

Classification Official Pattern
Administration method type Oral and Rectal (depending on the formulation)
Frequency pattern Once Daily (OD) or Divided Doses (up to four times daily, depending on the regimen)
Use-context constraints Dosage is dependent on the phase of disease: Active (Induction) versus Remission (Maintenance)

Resulting Procedural Structure

Official step sequence:

  • The total daily dose is established based on whether the treatment is for active disease or for long-term maintenance.
  • The oral prolonged-release dosage forms must be consumed whole or by specific approved methods, such as sprinkling onto soft food, without compromising the integrity of the release system.
  • The dose is taken either once daily or in divided amounts, ensuring the specified administration frequency is maintained.
  • If a scheduled dose is missed, the patient must follow the rule to skip the missed dose if the next dose is almost due, and never take two doses at once.

Connection to the overall use protocol (3 sentences): The usage protocol structures treatment into a defined, initial high-dose phase for acute management followed by a lower dose for long-term maintenance. This protocol mandates that the drug's prolonged-release mechanism be protected by specific intake rules, such as swallowing the forms intact or consuming prepared suspensions immediately. It also provides explicit instructions for dose frequency and the procedure for handling missed doses.

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Recent Clinical Evidence

Research evidence / Overview of studies

Pentasa (prolonged-release mesalazine) has been extensively evaluated in clinical trials for the management of mild-to-moderate Ulcerative Colitis (UC) and Crohn’s Disease (CD).


Overview of Efficacy Studies

Research investigated the drug in clinical and observational studies, primarily focusing on its role in UC. A systematic review and meta-analysis of randomized controlled trials (RCTs) found that mesalazine was associated with higher rates of achieving and maintaining remission when compared with placebo.

  • Induction of Remission (UC): Studies compared the effect of mesalazine (at doses typically between 2 g/day and 4 g/day) against placebo over short periods (e.g., 8 weeks). Results showed differences in the rate of combined clinical and endoscopic remission in favor of mesalazine.
  • Maintenance of Remission (UC): Longer-term studies indicated that use of the drug was associated with a lower risk of relapse compared with placebo over periods of 6 to 12 months.

Safety and Tolerability Profile

Safety and tolerability have been primary endpoints in all major clinical development phases. Data collected from meta-analyses indicate that the drug's adverse event profile is generally comparable to that of placebo in patients with UC.

  • Reported Adverse Events: Common adverse events reported in trials include headache, nausea, abdominal pain, and rash. The majority of these events are typically classified as mild to moderate.
  • Specific Monitoring: Due to the drug's metabolism, studies frequently included monitoring of liver enzyme levels and renal function throughout the trial duration. Changes in these parameters were observed in a small percentage of participants, leading to discontinuation in those specific cases.
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Frequently Asked Questions (FAQ)

Common questions about Pentasa Prolonged Release (FAQ)

Q: Is Pentasa considered a type of steroid?

No, Pentasa is not a steroid. The active ingredient, mesalamine, is officially classified as an aminosalicylate anti-inflammatory agent. This is a specific pharmacological class of medicine that is different from corticosteroids (steroids) and works locally on the lining of the digestive tract, as noted in regulatory documents like the FDA label.


Q: How quickly do people usually start to feel a difference after starting Pentasa?

The time it takes to observe a difference can vary between the oral and rectal forms. Clinical trial data for the rectal formulation suggest that initial effects may be observed within 3 to 21 days. For the oral prolonged-release forms, the full beneficial effect is typically expected after several weeks, sometimes aligning with the end of the initial prescribed treatment period (e.g., 6 to 8 weeks).


Q: Can Pentasa cause hair loss?

Slight hair loss has been reported as a possible side effect of mesalamine in patient information derived from post-marketing reports. However, it is generally not listed among the common or frequent adverse reactions detailed in the major regulatory prescribing information. Any changes may warrant discussion with a healthcare provider.


Q: How does Pentasa affect fertility in men or women?

Official information states that it is not definitively known whether mesalamine may make it harder to get pregnant. This specific topic is generally not addressed in core prescribing documents. Individuals concerned about family planning are encouraged to consult their physician.


Q: Is this medication ever stopped, or is it usually long-term?

Treatment with this medication can be either short-term or long-term, depending on the phase of the disease. It is used in higher doses to achieve initial remission and often continued in lower doses for long-term maintenance. Regulatory guidance suggests patients should not stop taking the medicine or change their dose without consulting their treating physician, as this may lead to a relapse of the underlying condition.


Q: What should be done if I experience a potential allergic reaction to Pentasa?

Official safety guidance advises that if signs of a severe skin reaction (such as a rash or mucosal lesions) or other hypersensitivity are suspected, the treatment should be stopped immediately. In such cases, contacting the prescriber right away or seeking emergency medical attention is the recommended course of action based on official safety warnings.


Q: How is the active ingredient in Pentasa different from a probiotic?

Pentasa contains mesalamine, which is a synthetic pharmaceutical medicine classified as an aminosalicylate anti-inflammatory agent. This drug is designed to reduce inflammation in the bowel wall. Probiotics are fundamentally different; they are classified as live microorganisms intended to introduce beneficial bacteria to the host, working through a different biological mechanism.


Q: Does official research show Pentasa helps prevent complications of IBD?

The medicine is indicated for treating and maintaining remission of ulcerative colitis, which addresses the underlying inflammation of the disease. Clinical trials evaluate the medicine’s ability to achieve and maintain remission. While reducing inflammation is an important goal, official research endpoints focus on measures like clinical remission and mucosal healing, rather than the prevention of all long-term complications.


Q: What is the maximum duration this medicine is typically prescribed for?

The duration of therapy depends on the patient's specific treatment plan. For the initial management of active disease (induction of remission), therapy is typically defined in clinical trials as 6 to 8 weeks. For preventing flares (maintenance of remission), the medication is often prescribed for long-term use, following the direction of the prescribing doctor.


Q: Can the medication affect mood or cause anxiety?

Official regulatory prescribing documents do not list anxiety or significant mood changes as frequent adverse reactions. However, clinical study reports have noted insomnia (difficulty sleeping) in some individuals. Any concerning changes in mood or sleep patterns may warrant communication with a physician.


Q: Are there specific instructions for what to do if the drug doesn't seem to be working?

If the drug does not appear to be working, or if your digestive symptoms suddenly worsen, official guidance suggests consulting your healthcare provider immediately. A worsening of symptoms could be a sign of a disease exacerbation or the rare Acute Intolerance Syndrome, which requires prompt medical evaluation.


Q: Does taking Pentasa affect vaccinations?

Mesalamine is documented to have an interaction with certain live vaccines, specifically the varicella (chickenpox) virus vaccine, particularly in pediatric patients. It is important to fully inform your doctor about all medications you are taking, including Pentasa, when discussing your full vaccination schedule.


Q: Why do official prescribing documents mention Sulfasalazine in relation to Pentasa?

Pentasa's active ingredient, mesalamine, is chemically related to the older medication sulfasalazine. The body metabolizes sulfasalazine to release mesalamine, which is the active therapeutic component. Additionally, official warnings advise caution for individuals who have a known allergy to sulfasalazine.


Q: Can the ingredients in the capsule cause any issues for people with food sensitivities?

The medicine is formally contraindicated (must not be used) if a patient has a known hypersensitivity to mesalamine, salicylates, or any of the inactive components (excipients) in the formulation. Patients with known food sensitivities may wish to review the full list of inactive ingredients with their pharmacist or doctor to confirm eligibility.


Q: Are there any known issues with taking herbal supplements alongside Pentasa?

Most complementary and herbal remedies are not subjected to official clinical testing for their interaction effects on prescription medications. General safety guidance recommends that patients should always inform their prescribing doctor about all substances they are consuming, including any herbal remedies or nutritional supplements.


Q: What does official guidance say about discontinuing Pentasa?

Official product guidance states that this medicine should not be stopped suddenly or have its dosage changed without consultation and instruction from a doctor. This protocol is in place because abruptly discontinuing the treatment may lead to a relapse or worsening of the underlying condition.

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How should Pentasa Prolonged Release be stored and disposed of?

How to Store and Dispose of Pentasa Prolonged Release

The storage requirements for Pentasa vary by formulation, but all forms must be kept out of the sight and reach of children.

Formulation Storage Conditions Disposal Requirements
Prolonged-Release Tablets Do not store above 25 C and do not freeze. Must be stored in the original package to protect from light to maintain the 36-month shelf-life. Dispose of according to local requirements.
Prolonged-Release Granules No special storage conditions are required for sealed sachets. Must be used immediately after opening the sachet. Dispose of according to local requirements.

All expired or unused medicines must not be disposed of via household waste or wastewater. Disposal should be carried out strictly in accordance with local regulatory guidelines.

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

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