Diabenol

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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 Diabenol

Property Description
Active ingredient Glibenclamide (Glyburide)
Form Oral tablet
Pharmacological class Sulfonylurea, Antidiabetic Agent
Common purpose Achieving glycemic control
Origin Synthetic organic compound

What Type of Drug is Diabenol (Glibenclamide)?

Diabenol is a prescription-only oral antidiabetic medication used to manage elevated blood glucose levels in adults with type 2 diabetes mellitus. Its active pharmaceutical ingredient (API) is Glibenclamide, which is also frequently identified as Glyburide in various global contexts. Glibenclamide is a synthetic organic derivative utilized for its pharmacological properties.

This compound belongs to the sulfonylurea pharmacological class, specifically categorized as a second-generation sulfonylurea derivative. The classification of Glibenclamide as a second-generation agent reflects its greater potency compared to older agents in this group. This status, along with its consistent inclusion in standard medical registries, confirms its established clinical recognition and role in public health systems.


Composition and Administration Form

Diabenol is prepared as a single-entity product, containing Glibenclamide as its sole main therapeutic component, and is administered as an oral tablet. The drug's presentation as an oral medication establishes its convenient route of systemic introduction into the body for patients requiring chronic therapy.

By manufacturing the final composition with Glibenclamide and necessary pharmaceutical excipients, the medication confirms its design as a singular agent intended for daily use in standard diabetes management regimens, ensuring stability and proper ingestion.


The General Purpose of Glibenclamide Action

The general purpose of Diabenol is to contribute to effective glycemic control by encouraging the pancreas to release more of the body’s stored insulin. This pharmacological activity identifies the substance as an insulin secretagogue, a mechanism that directly stimulates the insulin-producing pancreatic beta-cells.

By increasing the levels of circulating insulin, Glibenclamide facilitates the movement of glucose out of the blood and into the body’s peripheral tissues for energy utilization. This core action directly achieves the medication’s intended goal: lowering and maintaining stable blood glucose levels, which is essential for managing the long-term risks associated with type 2 diabetes.

Regulatory References

  1. WHO Essential Medicines List

What side effects are possible with Diabenol?

Possible side effects and safety information for Diabenol (Glibenclamide)


The official safety profile for Diabenol, a sulfonylurea medication, is structured around adverse reactions categorized by frequency and the physiological systems affected, as documented in regulatory sources.

Officially Documented Adverse Reactions

The most frequent adverse reaction listed in regulatory documents is hypoglycaemia (low blood glucose), classified as Very Common or Common. Other frequently reported effects often relate to Gastrointestinal Disorders (e.g., nausea, vomiting, abdominal pain). Rare effects documented include Allergic reactions, Hepatobiliary Disorders (such as cholestatic jaundice or hepatitis), and Haemolytic Anaemia.

Serious Safety Constraints

Specific warnings and serious adverse reactions are highlighted in official labeling. The drug carries a Special Warning concerning cardiovascular mortality, which is associated with the sulfonylurea class. Severe and prolonged hypoglycaemia is also a major risk documented in regulatory texts. Additionally, use is strictly contraindicated in patients with conditions such as Type 1 Diabetes Mellitus, Diabetic Ketoacidosis, or severe renal or hepatic impairment, as the risk of serious side effects is significantly increased in these populations.

Population-Specific Safety Notes

The official label mandates specific considerations for certain patient groups. Older adults are noted to have increased susceptibility to the hypoglycaemic action, requiring careful dose adjustment upon initiation. For individuals with G6PD deficiency, the official label documents a risk of developing haemolytic anaemia. The risk of hypoglycemia is also noted to be higher at treatment initiation or during dose escalation.

Overdose and Emergency Response

An overdose of Diabenol, which belongs to the oral hypoglycemic class of medicines, causes a dangerous drop in blood sugar, known as profound hypoglycemia. This condition can be life-threatening and may lead to permanent complications.

Symptoms of Overdose

The physiological effects of a severe drop in blood sugar may present as a combination of autonomic and central nervous system (CNS) symptoms:

  • Early Signs: Sweating, shakiness, intense anxiety, rapid heartbeat, confusion, and extreme hunger.
  • Severe Signs: Drowsiness, slurred speech, loss of coordination, seizures, and loss of consciousness (coma). Past history of stroke or heart conditions may increase the risk of serious complications.

When Immediate Medical Help is Required

Urgent medical attention must be sought immediately if any overdose is suspected, especially if severe symptoms occur or if the affected person becomes unconscious. Accidental ingestion, particularly of even a single dose by a child, is considered a medical emergency due to the risk of fatal hypoglycemia.

If a person is unconscious or too confused to follow instructions:

  1. Call emergency services (e.g., 911) right away.
  2. Do not attempt to put anything into their mouth.

Overdose often requires emergency treatment with intravenous glucose solutions to restore blood sugar levels. Because this class of medicine can cause prolonged hypoglycemia, hospital observation may be required for 24 hours or longer.

Therapeutic Uses of Diabenol

What Diabenol Treats: Main Uses and Benefits

The medication is commonly used in the treatment of conditions characterized by persistent high blood glucose (hyperglycemia) in adults with type 2 diabetes mellitus (T2DM). Its use may support the patient by contributing to the long-term goal of easing risks associated with microvascular and cardiovascular complications.


Therapeutic Focus and Relief

This medication is generally used to address conditions involving systemic imbalance by helping to control blood sugar levels. Therapeutic domains include management of conditions marked by persistent hyperglycemia, addressing metabolic stress symptoms, and providing support in clinical settings with elevated blood sugar. Diabenol is applied in addressing symptom clusters that may become disruptive, such as excessive thirst (polydipsia) and frequent urination (polyuria), both of which are symptoms related to heightened physiological activity caused by high blood sugar. It contributes to improved day-to-day comfort during symptomatic periods, which may assist with maintaining functional stability.

“This supportive management may help patients cope more steadily with symptom fluctuations and maintain a sense of stability when symptoms are more noticeable.”


Quick Fact

Quick Fact: Relief for Metabolic Stress Symptoms (Excessive Thirst and Urination)

Regulatory References

  1. Glyburide: MedlinePlus Drug Information

Eligibility and Restrictions for Use

Diabenol (Glibenclamide/Glyburide) is officially indicated for adults with Type 2 Diabetes Mellitus (T2DM). Regulatory authorities strictly define which populations are ineligible or require conditional use.


Contraindications (Who Must Not Use)

Use is absolutely prohibited in patients with:

  • Type 1 Diabetes Mellitus (T1DM) or Diabetic Ketoacidosis.
  • Known hypersensitivity to Glibenclamide, other sulfonylureas, or sulfonamide drugs.
  • Severe renal or hepatic impairment.
  • Concurrent treatment with the drug Bosentan.

Population-Specific Limitations

Population Category Eligibility Status (as per label)
Pediatric Patients (Under 18) Use is not established and not generally recommended.
Elderly Patients (Geriatric) Requires conditional use; close monitoring and careful dose adjustment are mandated due to hypoglycemia risk.
Pregnancy Not recommended or contraindicated; transfer to insulin is generally required.
Lactation (Breastfeeding) Not recommended or contraindicated.

Other Restrictions

Conditional use is required for patients with mild to moderate kidney or liver impairment, adrenal or pituitary insufficiency, or poor general health. The drug is also prohibited in patients with rare hereditary issues like porphyria.

What should I know about interactions with other medicines?

Interactions with other medicines and products

This section outlines interactions with Diabenol (Glibenclamide) as documented in official government regulatory sources, strictly detailing necessary constraints and regulatory classifications.


Official Interaction Classifications and Restrictions

Classification Interacting Substance/Condition Regulatory Constraint
Contraindicated Combinations Bosentan, Systemic Miconazole Co-administration is explicitly prohibited.
Timing Requirements Colesevelam Diabenol must be taken at least 4 hours prior to Colesevelam.
Population-Specific Note G6PD Deficiency Use is not recommended due to risk of hemolytic anemia.

Documented Pharmacological Effects

Interactions are structured around substances that can either potentiate or diminish the hypoglycemic effect of Glibenclamide.

Potentiation (Increased Hypoglycemic Effect): The risk of hypoglycemia is increased when Diabenol is co-administered with drugs such as ACE Inhibitors, NSAIDs, Salicylates, and certain CYP2C9 Inhibitors (e.g., Fluconazole). Additionally, Glibenclamide may increase the plasma concentration of Cyclosporine.

Diminution (Decreased Hypoglycemic Effect): Loss of glycemic control may occur when Diabenol is co-administered with drugs such as Thiazide Diuretics, Corticosteroids, Oral Contraceptives, and CYP2C9 Inducers (e.g., Rifampicin).

Non-Medicinal Product Interaction: Consumption of Alcohol (Ethanol) is not recommended as it may unpredictably potentiate or weaken the drug’s blood glucose-lowering action, according to regulatory documents.

Mechanism of Action

How Diabenol Works


Diabenol (Glibenclamide) functions as an insulin secretagogue, initiating its mechanism through the specific binding and blockade of the Sulfonylurea Receptor 1 ( SUR1), a subunit of the K ATP channel on the pancreatic beta cell membrane. This inhibition prevents potassium ions ( K^+) from exiting the cell, causing the beta cell membrane to depolarize.

The resulting shift in membrane potential opens adjacent voltage-dependent calcium channels. This leads to an influx of extracellular calcium ions ( Ca^2+) into the cytoplasm, which acts as the intracellular signal to trigger the exocytosis of stored insulin granules into the bloodstream. This action leads to an increase in circulating endogenous insulin concentration.

The higher insulin level subsequently facilitates the peripheral utilization of glucose by target tissues and contributes to a reduction in glucose output by the liver. The entire process requires the presence of functional beta cells capable of synthesizing and storing insulin.

Dosage and Administration Information

How to Use Diabenol: Administration Guidelines

Diabenol (Glibenclamide/Glyburide) is prescribed as an oral tablet and must be administered according to prescribed specifications. It is intended for long-term management and its usage protocol is centered on controlled titration and precise timing.


Dosing and Frequency

The medicine must be taken once daily with breakfast or the first main meal of the day to ensure proper administration context.

Dosage Form Starting Daily Dose (Adult) Maximum Daily Dose
Standard Tablet 2.5 mg to 5 mg 20 mg
Micronized Tablet 1.5 mg to 3 mg 12 mg

The dosage is titrated incrementally based on the patient's blood glucose response, with increases typically made at weekly intervals. If the prescribed daily dose exceeds 10 mg for the standard tablet or 6 mg for the micronized tablet, the dose must be administered in divided doses (e.g., twice daily).

Special Administration Instructions

  • Older Adults and Impairment: For older adults and patients with liver or kidney impairment, treatment is typically initiated with a lower, conservative starting dose (e.g., 1.25 mg standard or 0.75 mg micronized) to mitigate risks.
  • Missed Dose: If a dose is missed, the subsequent dose must not be doubled to compensate for the omission.
  • Formulation Switch: The micronized and standard tablet formulations are not bioequivalent, and re-titration of the dose is required if a patient switches between them.

These parameters provide a fixed procedural structure that governs the initiation, adjustment, and timing of the medicine's administration to ensure standardized use.

Recent Clinical Evidence

Evidence for Use in Type 2 Diabetes Mellitus

Research utilized Randomized Controlled Trials (RCTs) and Systematic Reviews to evaluate Glibenclamide for the management of Adult Type 2 Diabetes Mellitus (T2DM). Studies monitored biomarkers like Glycated Hemoglobin (HbA1c) and change in blood glucose levels. Findings describe patterns observed related to HbA1c levels, with research exploring outcomes related to systemic imbalance. Data show patterns related to dosage, where increasing the amount beyond a specific point may not yield a proportional additional effect. This research provides insight into short-term changes in glucose control, but research does not determine whether an individual will respond similarly.


Long-Term Studies and Durability of Response

A body of research has been observed in monitoring outcomes over extended follow-up periods using large-scale observational cohorts. This research assessed major clinical outcomes, including Cardiovascular Events and All-cause Mortality. Comparative studies examined Glibenclamide alongside other therapeutic options, with findings sometimes mixed or subject to methodological differences. Certainty remains low regarding its long-term comparative performance.


Research in Specific Patient Groups

Glibenclamide was studied primarily in adults with T2DM, including those with inadequate glucose control or cardiovascular risk factors. Findings indicate that results apply only to the populations studied. Subgroup findings are uncertain, and data for certain groups (such as the oldest adults) remain insufficient.


Consistency of Evidence and Key Limitations

Evidence quality varies across studies. Limitations often relate to methodological heterogeneity in older clinical trials. Large observational studies are subject to residual confounding factors, which may lead to uncertainty in the reported long-term vascular outcomes, as comparative evidence is lacking in some contexts.


What Remains Uncertain in the Research Landscape

A key limitation is the non-linear dose-response pattern, which provides limited information on escalating treatment. The long-term effects regarding major clinical events (like heart attack or stroke) are not yet certain due to limited information for long-term outcomes. Data for specific, smaller subgroups remain insufficient, and the research is ongoing in certain areas of the evidence landscape.

Frequently Asked Questions (FAQ)

Common questions about Diabenol (FAQ)


Q: How is Diabenol described in official documents compared to standard treatments?

A: According to official regulatory documents, Diabenol belongs to a class of medicines called sulfonylureas. This class is generally known to stimulate the pancreas to release more of the body’s stored insulin. This mechanism is different from other standard treatments for Type 2 Diabetes, such as biguanides, which primarily work by reducing the amount of glucose produced by the liver.


Q: I keep seeing people talk about a specific side effect—is that actually listed in official documents?

A: Official product information contains a detailed list of adverse reactions that have been reported during clinical use. If a particular symptom is not found on the official label, it may be a symptom related to a known effect, such as low blood sugar (hypoglycemia), or it may be considered rare or unverified. The full list of side effects is available in the safety information section of the product labeling.


Q: What types of over-the-counter medicines are officially noted as interacting with Diabenol?

A: Regulatory documents list certain drug classes that may potentiate, or increase, the blood glucose-lowering effect of Diabenol, which raises the risk of hypoglycemia (low blood sugar). Specifically, drug classes like Nonsteroidal Anti-inflammatory Drugs (NSAIDs) and Salicylates are officially noted as interacting substances. The Interactions section of the official label contains a more complete list of pharmacological interactions.


Q: What is the difference between Diabenol and another medication used for the same condition, based on their official descriptions?

A: Diabenol (Glibenclamide) is officially described as an insulin secretagogue. This means its core function is known to be stimulating the pancreatic beta cells to release stored insulin. This mechanism differs from other medications used for Type 2 Diabetes that may work through different pathways, such as reducing the body's glucose absorption or production.


Q: How is Diabenol generally processed and eliminated by the body? (Factual pharmacokinetics)

A: Official documents state that the drug is rapidly absorbed into the bloodstream after ingestion and typically reaches its peak concentration levels in about four hours. The drug has a half-life of approximately 10 hours, which is the time it takes for half of the dose to be cleared from the body. Diabenol is primarily eliminated from the body as inactive compounds through both the bile and the urine.


Q: Can Diabenol be crushed or split according to the manufacturer?

A: Official guidance establishes that the various tablet formulations (micronized versus standard) are not bioequivalent, meaning they are not fully interchangeable. This regulatory information suggests that the precise tablet integrity is critical, and physical alteration may compromise its intended activity.


Q: Does official prescribing information indicate that Diabenol causes weight changes?

A: Yes. According to the official prescribing information, weight gain is listed as a common or frequently reported adverse reaction associated with the use of Diabenol (Glibenclamide).


Q: Are there any specific foods that are described in official documents as interacting with Diabenol?

A: The consumption of alcohol (ethanol) is the non-medicinal product that is officially noted in regulatory documents. Alcohol is not recommended because it may unpredictably potentiate (increase) or weaken the drug’s intended blood glucose-lowering action. No specific food interaction warnings are typically noted in the core regulatory documentation.


Q: Does Diabenol affect blood pressure?

A: The official label includes a Special Warning concerning cardiovascular mortality that is associated with the sulfonylurea class of medicines. While this relates to systemic circulation, a direct effect on blood pressure is not specified as a primary, commonly reported side effect in the adverse reactions section.


Q: Does Diabenol require any special monitoring, such as routine lab tests, by a doctor?

A: Yes, official regulatory guidance requires regular clinical and laboratory evaluations during treatment. This monitoring includes the periodic determination of Glycated Hemoglobin (HbA1c) and blood glucose levels. These tests are necessary to assist the prescriber in assessing the patient's long-term response to the therapy.


Q: Are there specific lab tests generally required before a patient starts using Diabenol?

A: Yes. An initial assessment for patients with known or suspected renal (kidney) or hepatic (liver) impairment is required, as stated in official guidance. The drug is strictly contraindicated in severe cases, and conditional use is mandated for patients with milder impairment to manage risks.


Q: What general facts are known about discontinuing Diabenol treatment? (Informational, non-directive)

A: Regulatory information cautions that abruptly stopping the medication may lead to an increase in blood sugar levels, which is a known risk when treatment is interrupted. Treatment decisions should always align with official medical guidance.


Q: Does Diabenol interact with grapefruit or grapefruit juice?

A: Studies that examined the way the body processes Diabenol (pharmacokinetics) suggest that grapefruit juice does not appear to significantly change the drug's activity or elimination. Therefore, no specific regulatory warning regarding this interaction is generally issued.


Q: What are the signs and symptoms of a reported allergic reaction to Diabenol?

A: Officially reported signs that may indicate a serious allergic reaction include rash, hives, itching, and swelling of the face, lips, or tongue. If a patient experiences signs of a severe allergic reaction, this is noted as a medical concern in official safety documents.


Q: Does Diabenol affect sleep patterns or cause insomnia?

A: Insomnia is not directly listed as an officially reported side effect. However, the most frequent side effect, hypoglycemia (low blood sugar), can cause symptoms like sleepiness, fatigue, and weakness. These symptoms may potentially affect a person's sleep quality.


Q: Is it described as normal to experience minor stomach upset when starting Diabenol?

A: Yes, Gastrointestinal Disorders are officially listed as commonly reported effects. These include symptoms such as nausea, vomiting, or diarrhea. Some regulatory-sourced patient documents note that these effects are often reported when a patient first starts taking the drug.


Q: Why do some patient reports mention that Diabenol makes them feel tired?

A: Feeling very tired or weak is a commonly listed symptom associated with the drug’s most frequent side effect, hypoglycemia (low blood sugar). This effect is known to be associated with the drug’s mechanism of lowering blood sugar, and this potential risk is described in official documents.


Q: How long does it usually take to notice any intended effect from Diabenol?

A: The drug is rapidly absorbed and its intended effect of lowering blood glucose is established to persist for 24 hours following a single morning dose.


Q: What is the typical duration of treatment described in official prescribing information for Diabenol? (Informational)

A: Diabenol is officially indicated for the long-term management of blood glucose levels in adults with Type 2 Diabetes Mellitus. This classification confirms its established use in chronic therapy, rather than short-term treatment.

How should Diabenol be stored and disposed of?

Diabenol (Glibenclamide) tablets must be stored according to official regulatory requirements to ensure product quality and safety.

Storage Conditions

The tablets require storage at controlled room temperature, typically 20 C to 25 C (68 F to 77 F). The product must be protected from moisture and excessive heat, and it must not be frozen. The medication should be kept in its original container, which must be securely tightly closed, to protect the contents.

Protection and Disposal

For safety, Diabenol must always be stored out of the sight and reach of children. Unused or expired medication should be disposed of by following local regulations or utilizing a community drug take-back program. It should not be flushed down a toilet or poured into a drain unless specifically instructed by official labeling.

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

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