Glisan MR

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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.

Overview of Glisan MR

Property Description
Active ingredient Gliclazide
Form Modified Release (MR) Tablet
Pharmacological class Oral Hypoglycemic Agent (Sulfonylurea)
Common use Management of Type 2 Diabetes Mellitus
Origin Synthetic derivative

What Type of Medicine is Glisan MR?

Glisan MR is a synthetic, prescription-only Oral Hypoglycemic Agent (OHA) used for the long-term management of high blood sugar in adults. The medicine is defined by its sole active ingredient, Gliclazide, which is classified within the sulfonylurea group of antidiabetic drugs, specifically representing a second-generation derivative. Gliclazide is used for assisting patients with Type 2 Diabetes Mellitus to achieve long-term glucose control. The general therapeutic role of this classification is to assist the body in maintaining stable glucose homeostasis by addressing the issue of chronically elevated blood glucose.


Understanding Glisan MR's Composition and Modified Release Form

Glisan MR is a single-entity pharmaceutical preparation presented as an oral dosage form, specifically a Modified Release (MR) Tablet. This formulation is a key differentiating feature. The Gliclazide active compound is formulated with specialized solid oral excipients that create an internal matrix for sustained release. The MR designation is critical, signifying that the active ingredient is not released immediately, but is instead dispersed slowly and continuously throughout the day. This controlled delivery system is engineered to maintain a consistent, steady supply of Gliclazide to facilitate more stable glucose regulation over a prolonged period compared to immediate-release formulations, which can be beneficial in managing the continuous metabolic demands of diabetes.


What is the General Purpose of Glisan MR?

The general purpose of Glisan MR is to help the body effectively lower and control blood sugar levels by acting on the pancreas. As a sulfonylurea agent, its primary function is to directly encourage the pancreatic β-cells to release more insulin, which is the hormone essential for processing glucose. This fundamental mechanism of promoting and enhancing the body's own insulin secretion is its core function, making it an indispensable component for long-term metabolic control in the daily lives of patients with Type 2 Diabetes Mellitus. For instance, it is typically prescribed to patients whose blood glucose levels are not adequately controlled by diet and exercise alone.

Regulatory References

  1. NICE Guideline NG28: Type 2 diabetes in adults: management

What side effects are possible with Glisan MR?

Possible Side Effects and Safety Information

The safety profile of Gliclazide Modified-Release (Glisan MR) is formally documented in regulatory texts, with adverse effects classified by frequency and affected organ system. As an Oral Hypoglycemic Agent, the most frequent and clinically significant reaction is hypoglycaemia, which is officially classified as a Common adverse reaction. Symptoms of hypoglycaemia may include sweating, anxiety, tremor, confusion, and visual disturbances.


Adverse Reaction Classifications

Adverse effects are grouped by System-Organ Class (SOC) in official labeling:

  • Uncommon adverse reactions primarily affect the Gastrointestinal Disorders system, including abdominal pain, nausea, vomiting, dyspepsia, diarrhoea, and constipation.
  • Rare or isolated reports involve the Hepatobiliary Disorders (e.g., elevated hepatic enzymes, cholestatic jaundice) and Blood and Lymphatic System Disorders (e.g., leucopenia, anaemia, thrombocytopenia).

Serious Safety Considerations

Serious Adverse Reactions documented in regulatory sources include cases of severe, prolonged hypoglycaemia, and rare but severe dermatological events such as Stevens-Johnson syndrome and Toxic Epidermal Necrolysis. Changes in blood and liver function are generally reported to be reversible upon discontinuation of the medicine.


Population and Concomitant Use Constraints

The medicine is subject to Population-Specific Safety Constraints. It is formally contraindicated in patients with severe hepatic or renal insufficiency, and older adults are considered particularly susceptible to severe hypoglycaemia. Furthermore, the label explicitly restricts concomitant use with Miconazole due to the potentiation of the hypoglycaemic effect, and warns of increased risk of hypoglycaemia when consuming alcohol.

Overdose and Emergency Response

Overdose and When to Seek Help

Overdose with Glisan MR (Gliclazide Modified Release) is primarily defined by the risk of hypoglycemia, or severely low blood glucose concentration, as documented in regulatory prescribing information. This risk is particularly serious due to the Modified Release (MR) formulation, which can result in delayed or recurrent hypoglycemia requiring prolonged medical intervention.


Documented Overdose Manifestations and Risks

Manifestation Type Official Documentation Statement
Symptom Cluster Symptoms often include sweating, tremor, tachycardia (rapid heartbeat), confusion, drowsiness, and hunger; severe cases involve seizures and coma.
High-Risk Groups Elderly patients and those with hepatic or renal impairment face an increased susceptibility to severe and prolonged hypoglycemic reactions.
Treatment Context No specific drug antidote is known. Management requires symptomatic and supportive treatment, focusing on the correction of hypoglycemia via glucose administration.

Regulator-Mandated Emergency Actions

Immediate medical attention is required upon any suspicion of overdose or onset of symptoms. Hospitalization or immediate medical treatment are necessitated for all episodes of severe or prolonged hypoglycemia. Due to the Modified Release properties, prolonged observation and frequent blood glucose monitoring are mandated procedures for up to 72 hours, even after initial symptom resolution, to prevent life-threatening complications.

Therapeutic Uses of Glisan MR

What Glisan MR Treats: Main Uses and Benefits

Glisan MR is relevant for managing conditions characterized by periods of heightened symptoms, commonly used across conditions presenting with Type 2 Diabetes Mellitus (T2DM) in adults. The medication helps address symptom clusters that may become intense or disruptive, primarily targeting symptoms related to systemic imbalance, such as elevated blood glucose. It is considered relevant for managing symptoms that interfere with daily comfort, which is typically applied when conditions produce significant symptomatic burden, such as sub-optimal glycemic control.

This is relevant when supportive symptom management is appropriate, applied in settings marked by temporary physiological imbalance to help maintain a sense of stability when symptoms are more noticeable. The medicine contributes to easing the overall symptom load and may assist with maintaining functional stability. This helps improve day-to-day comfort during symptomatic periods and supports general well-being.

“The medication helps address symptom clusters that may become intense or disruptive, supporting the patient during difficult episodes by easing distress and contributing to easing the overall symptom load.”

This medicine is commonly used to help with conditions presenting with Type 2 Diabetes Mellitus and chronically elevated blood glucose, helping manage symptoms that are common with sub-optimal glycemic control.


Quick Fact: Relief for Symptoms related to Systemic Imbalance Glisan MR is commonly used to help stabilize blood sugar levels, assisting with the sustained management of symptoms related to systemic imbalance.

Regulatory References

  1. Therapeutic Goods Administration (TGA) Diamicron MR SmPC

Eligibility and Restrictions for Use

Glisan MR is an extended-release formulation of gliclazide, a sulfonylurea medication prescribed for adults with Type 2 diabetes mellitus to help manage blood glucose levels, typically when diet, exercise, and weight loss are not sufficient.

Who Can Use Glisan MR?

  • Adults diagnosed with Type 2 diabetes whose condition is not adequately controlled by lifestyle changes alone.
  • It may be used as a monotherapy or in combination with other anti-diabetic medications, such as metformin.

Who Should Not Use Glisan MR? (Contraindications)

The use of Glisan MR is not recommended for certain individuals, as it may pose significant health risks. Contraindications include:

  • Patients with Type 1 diabetes mellitus or diabetic ketoacidosis.
  • Individuals with a known allergy or hypersensitivity to gliclazide, other sulfonylureas, or sulfonamide-derived medicines.
  • Those with severe liver disease or severe kidney disease (renal failure).
  • Pregnant or breastfeeding women. Insulin is generally the preferred treatment for diabetes in these situations.
  • Patients taking the antifungal medication miconazole.

What should I know about interactions with other medicines?

Interactions with other medicines and products

Official regulatory documents classify interactions with Glisan MR (Gliclazide Modified Release) primarily based on their effect on blood glucose levels, leading to three main categories of co-administered substances.

Contraindicated and Non-Recommended Combinations

  • Contraindicated: Co-administration with Miconazole (systemic or oromucosal gel) is strictly prohibited due to the significant potentiation of the glucose-lowering effect, which poses a serious risk of severe hypoglycaemia (low blood sugar), potentially leading to coma.
  • Not Recommended: The combination with Phenylbutazone (systemic route) or Alcohol is strongly discouraged. Phenylbutazone increases the effect of Glisan MR by reducing its elimination, while alcohol can intensify the glucose-lowering action, particularly in cases of acute intoxication.

Combinations Requiring Special Care

Certain product categories require close monitoring and potential adjustment due to their documented interaction effects:

Interaction Type Examples of Interacting Categories/Substances
Potentiation of Glucose-Lowering Effect Other antidiabetic agents, Beta-blockers, Salicylates, Fluconazole, MAO inhibitors, Clarithromycin, Sulfonamides
Weakening of Glucose-Lowering Effect Corticosteroids, Danazol, Chlorpromazine, Intravenous Salbutamol/ Ritodrine/ Terbutaline

Additionally, Glisan MR may increase the effect of Coumarin derivatives (e.g., Warfarin), requiring careful regulatory monitoring of the anticoagulant status. In patients with severe renal or hepatic impairment, the risk of severe hypoglycaemic reactions is noted to be increased.

Mechanism of Action

Glisan MR is the modified-release formulation of gliclazide, a sulfonylurea medication. Its mechanism of action involves two primary mechanistic domains: Insulin Secretion Modulation and Vascular and Oxidative Effect Engagement.

Modulation of Pancreatic beta-Cell Secretion

This domain covers the primary pharmacodynamic action: direct binding to the sulfonylurea receptor 1 (SUR1) on pancreatic beta-cells. This interaction results in the closure of ATP-sensitive potassium (KATP) channels. The resulting change in membrane potential leads to beta-cell depolarization, opening voltage-gated calcium channels, and ultimately triggering the release (exocytosis) of stored insulin. This initial binding event initiates the signaling cascade that modifies pathway activity.

Vascular and Oxidative Effect Engagement

Beyond stimulating insulin release, Glisan MR engages secondary mechanisms influencing cellular and vascular processes. It exhibits antioxidant properties that attenuate the activity of specific cellular mediators. Additionally, it demonstrates an anti-platelet effect, which influences platelet aggregation and microvascular tone, affecting processes governed by distinct cellular signaling patterns in the peripheral environment.

Dosage and Administration Information

Administration Scope

Glisan MR, an oral hypoglycemic agent, is administered exclusively via the oral route. The typical adult regimen starts with an initial daily dose of 30 mg. Subsequent dose adjustments are typically made in 30 mg increments, with the maximum recommended daily dose reaching 120 mg.


Procedural Usage Rules

Single Daily Intake: The dosage is administered once a day, designed to be taken precisely at breakfast time to align with food intake and the sustained-release mechanism.

Tablet Integrity: The Modified-Release (MR) tablet must be swallowed whole and cannot be crushed, chewed, or divided. This procedural rule is essential to maintain the integrity of the controlled-release formulation and ensure the proper, slow dispersion of the active compound over 24 hours.

Missed Dose Management: If the scheduled dose is missed, the dose on the following day must not be increased to compensate. The regimen should resume with the next regular dose.


Population-Specific Guidelines

Dosing for older adults (aged 65 years and above) and individuals with mild to moderate renal impairment typically follows the standard adult dosing regimen, as initial dose modification is typically not required. The use of this medicine in the pediatric population (under 18 years) is not established.


Connection to the overall use protocol:

The usage protocol for Glisan MR is fundamentally structured around a precise once-daily, with-food administration pattern, tied to the Modified-Release formulation. This protocol includes both the dose range and the procedural constraints, such as swallowing the tablet whole, to ensure the consistent, long-term delivery profile intended by the drug's design.

Recent Clinical Evidence

Research evidence / Overview of Studies for Glisan MR

Evidence for Use in Type 2 Diabetes Management

The main body of research on Glisan MR has been evaluated in studies exploring its use for high blood sugar levels in adults with Type 2 Diabetes Mellitus. This area of research relies heavily on Randomized Controlled Trials (RCTs), where people are assigned by chance to different study groups, alongside broad Systematic Reviews and Meta-analyses that combine data from multiple trials. The evidence base includes large-scale, long-term observational studies that monitored people over many years.

These studies research examined how Glisan MR affected biomarkers like Glycated Hemoglobin (HbA1c) and Fasting Plasma Glucose. Long-term studies specifically monitored outcomes related to systemic imbalance, including the measured occurrence of microvascular outcomes, such as those affecting organs sensitive to diabetes. The findings describe patterns observed in the studies where changes in blood sugar marker measurements were reported across various trial settings.


Research on Comparative and Combination Use

Research has explored how Glisan MR was evaluated in scenarios where it is combined with other established antidiabetic medications, such as Metformin, or when it was observed in trials that compared it directly to alternative oral hypoglycemic agents. These comparative studies often use active-comparator designs. Findings indicate that the measured shifts in blood sugar markers was observed in some studies to align closely with those seen in trials of other sulfonylurea agents. When evaluated as an add-on medicine with Metformin, studies documented patterns of changes in blood sugar markers compared to using Metformin alone.

Comparative evidence is lacking for many direct head-to-head, long-term comparisons against all the newest medication classes now available for Type 2 Diabetes.


Long-Term Studies and Extended Follow-up

Research has included studies with extended follow-up durations which examined outcomes associated with Glisan MR use beyond the standard six-month or one-year trial period. These large observational settings and clinical records research examined the relationship between Glisan MR use and the occurrence of diabetes-related events over several years. This extended research contributes to the broader evidence landscape by offering insight into how blood sugar patterns evolved in the observed populations over time.

There is limited information for long-term outcomes across all possible study endpoints, and the research for all oral diabetes medications must contend with the fact that Type 2 Diabetes Mellitus is a progressive condition.

Key Studies & References NICE Guideline NG28: Type 2 diabetes in adults: management

Frequently Asked Questions (FAQ)

Common questions about Glisan MR (FAQ)

Q: What is the expected long-term duration of treatment with Glisan MR?

Glisan MR is an Oral Hypoglycemic Agent intended for the long-term management of high blood sugar in adults with Type 2 Diabetes Mellitus. According to official information, as Type 2 diabetes is a chronic condition, treatment often continues long-term as determined by a healthcare provider and is regularly monitored.

Q: Is it common to experience headache or dizziness after starting Glisan MR?

Headache and dizziness have been reported in clinical studies. Dizziness is also listed as a potential symptom of hypoglycaemia (low blood sugar), which is officially classified as a common adverse reaction of this medication.

Q: Are there any specific foods or drinks that should be avoided while taking Glisan MR?

Official regulatory warnings strongly discourage combining Glisan MR with alcohol, as it can intensify the medicine's glucose-lowering effect. Glisan MR is a Modified-Release formulation designed to be taken with food, specifically at breakfast, to ensure the proper release of the active ingredient and help reduce the risk of low blood sugar.

Q: What is the official pregnancy risk classification for Glisan MR?

Glisan MR is formally contraindicated for use during pregnancy, according to official product information. Insulin is generally considered the preferred therapeutic approach for managing diabetes in pregnant women.

Q: Does Glisan MR affect a person's ability to drive or focus?

Official documents indicate that Glisan MR can cause hypoglycaemia (low blood sugar). Symptoms of hypoglycaemia, such as confusion, dizziness, or visual disturbances, may impair one's ability to drive or safely operate machinery, especially when starting treatment.

Q: Is Glisan MR classified as a controlled substance or narcotic?

Glisan MR (Gliclazide) is classified as an Oral Hypoglycemic Agent belonging to the sulfonylurea group of antidiabetic drugs. Official regulatory systems do not classify this medicine as a controlled substance or narcotic.

Q: Does Glisan MR cause changes in body weight or appetite?

Regulatory research has characterized Glisan MR as having a profile of minimal weight gain compared to some other sulfonylurea medications, often being described as weight neutral.

Q: Where can I find the official patient information leaflet (PIL) for Glisan MR?

The official documentation, such as the Patient Information Leaflet (PIL) or the Summary of Product Characteristics (SmPC), is available through the national medicines regulatory authority in your region. These regulatory bodies publish the official product labeling on their websites.

Q: Can Glisan MR be taken by individuals with a history of heart conditions?

Official guidelines do not list a general history of heart conditions as a contraindication. However, patients with severe vascular disease are noted in safety warnings as being at increased risk of hypoglycaemia and require careful clinical monitoring.

Q: Does Glisan MR require routine blood tests or monitoring while in use?

Official guidelines state that patients are required to be under close medical supervision with Glisan MR. This supervision necessitates regular monitoring of blood sugar levels and the long-term marker Glycated Hemoglobin (HbA1c) to help ensure optimal treatment control.

Q: Is Glisan MR associated with physical or psychological dependence?

Glisan MR is an Oral Hypoglycemic Agent used for chronic diabetes management. It is not classified by regulatory bodies as a medication associated with drug dependence or having abuse potential.

Q: What should be done if someone accidentally takes too much Glisan MR?

Taking too much Glisan MR can lead to severe, prolonged hypoglycaemia (very low blood sugar), which is a serious safety consideration listed in official documents. Immediate emergency medical attention is necessary in this scenario.

Q: What are the official guidelines regarding stopping Glisan MR?

The decision to stop Glisan MR is required to be made and supervised by a healthcare provider. Stopping the medicine suddenly without supervision can lead to a rebound in high blood sugar (hyperglycaemia).

Q: Is it normal to feel no immediate effect after starting Glisan MR?

Yes. Glisan MR is engineered as a Modified-Release formulation to disperse the active ingredient slowly and continuously over 24 hours. The medicine is intended for long-term glucose control and is not designed to produce an immediate, noticeable subjective effect.

Q: Are there documented cases of tolerance developing to Glisan MR over time?

Type 2 Diabetes is recognized as a progressive condition that can naturally require treatment adjustments over time. While the drug’s primary action has been shown to persist over long periods in studies, ongoing medical monitoring is necessary to adjust to the disease’s progression.

How should Glisan MR be stored and disposed of?

How to Store and Dispose of Glisan MR?

The storage and disposal of Glisan MR (Gliclazide Modified Release) tablets must comply strictly with official regulatory requirements to maintain product stability.

Storage Requirements

Storage Factor Condition Required by Label
Temperature Store below 30 C (86 F); must not be refrigerated or frozen.
Protection Keep in a dry place and protect from moisture.
Packaging Keep the tablets in the original container or package.

Glisan MR must be kept out of the sight and reach of children as a mandatory safety requirement.

Disposal Instructions

Unused or expired Glisan MR must be disposed of according to local pharmaceutical waste regulations. The medicine must not be disposed of via household waste or flushed down the toilet to prevent environmental contamination. Products should be returned to a pharmacist or designated collection facility for proper handling.

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

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