Benclamid

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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 Benclamid

Property Description
Active ingredient Glibenclamide (Glyburide)
Form Tablet, Micronized Tablet
Pharmacological class Oral Hypoglycemic Agent; Second-Generation Sulfonylurea
Common purpose To lower and manage blood sugar levels
Origin Synthetic Organic Compound

Glibenclamide: Identity and Pharmacological Classification

Benclamid is a prescription-only oral medication that contains the active substance Glibenclamide, also recognized internationally as Glyburide. Glibenclamide is clinically recognized as a potent compound in its class, classified as an oral hypoglycemic agent that specifically belongs to the second-generation sulfonylurea pharmacological class. This compound is a synthetic organic derivative defined by its N-sulfonylurea structure, which contributes to its long duration of action compared to earlier generations.


What is the Composition and Form of Benclamid?

The pharmaceutical product Benclamid is formulated as a single-ingredient drug, with Glibenclamide serving as the sole active ingredient. It is commonly available in a solid tablet or micronized tablet dosage form for administration by mouth. The micronized tablet is a distinctive feature of Glibenclamide preparations, designed for potentially quicker and more consistent absorption. The composition includes the Glibenclamide compound along with necessary inactive pharmaceutical excipients required to create a stable and orally available preparation.


General Purpose: What Does Benclamid Help Achieve?

The primary purpose of taking Benclamid is to help the body effectively lower and manage blood sugar levels, contributing to improved glycemic control. It achieves this by functioning as an insulin secretagogue, directly encouraging the specialized beta cells in the pancreas to release stored insulin. Sulfonylureas, like Glibenclamide, are standard agents used for managing blood sugar that is not adequately controlled by diet and exercise alone. This action ensures that sugar is moved from the bloodstream into the tissues, addressing the metabolic needs of the body, particularly for adult patients with Type 2 diabetes.

What side effects are possible with Benclamid?

Possible Side Effects and Safety Information

The safety profile of Benclamid, containing Glibenclamide (Glyburide), is officially classified by regulatory authorities, with adverse reactions grouped by frequency and the physiological system affected.

Frequency Classification of Adverse Reactions

The most commonly documented adverse reaction is hypoglycemia (low blood sugar), which is characteristic of the sulfonylurea class. Gastrointestinal disturbances such as nausea and abdominal pain are generally classified as uncommon. Rare adverse reactions include changes in blood counts (e.g., leucopenia, agranulocytosis) and hepatic issues (e.g., cholestasis, jaundice).

Adverse Reactions by System-Organ Class

Official labeling categorizes side effects within specific System-Organ Classes (SOC):

System-Organ Class Examples of Documented Adverse Reactions
Metabolism and nutrition Hypoglycemia (common)
Gastrointestinal disorders Nausea, vomiting, abdominal pain (uncommon)
Blood and lymphatic system Agranulocytosis, aplastic anemia, leucopenia (rare)
Hepatobiliary disorders Jaundice, elevated liver enzymes, hepatic failure (rare)
Skin and subcutaneous tissue Pruritus, rash, photosensitivity reactions

Serious Adverse Reactions and Safety Considerations

The potential for severe hypoglycemia is the most significant safety consideration, as it can be life-threatening. Rare, but critical, severe events also include hepatic failure and serious hematological abnormalities.

Safety notes indicate that older adults and individuals with impaired renal or hepatic function may have an increased susceptibility to severe hypoglycemic events. Official documentation establishes that use is not appropriate in cases of severe kidney or liver impairment.

Overdose and Emergency Response

Overdose and When to Seek Help

Overdosage with Benclamid (Glibenclamide) is defined by regulatory authorities as a medical emergency primarily characterized by profound and prolonged hypoglycemia, which is an abnormally low blood glucose level. The severity of the overdose is directly related to the resulting lack of glucose supply to the brain, which may manifest as severe neuroglycopenic complications.

Documented Manifestations and Serious Outcomes

Official labeling documents state that an overdose may initially present with symptoms of hypoglycemia, including shakiness, anxiety, sweating, and a fast heartbeat. As the condition progresses, documented severe outcomes may include confusion, stupor, seizures, and eventually coma. Even the ingestion of a single tablet has the potential to cause life-threatening hypoglycemia in vulnerable individuals.

Regulatory Mandates for Emergency Action

When overdosage is suspected or confirmed, regulatory guidance requires that patients seek immediate medical attention. Prompt hospitalisation is explicitly mandated, especially when severe neurological manifestations such as loss of consciousness or convulsions are present. The management procedure, as documented in official prescribing information, involves the administration of intravenous glucose (dextrose) and close, sustained monitoring of blood glucose levels for a minimum of 12 to 24 hours.

Population-Specific Risk

Regulatory documentation specifically notes that elderly patients and individuals with severe hepatic or renal impairment face an increased risk of experiencing serious and prolonged hypoglycemic reactions in an overdose setting.

Therapeutic Uses of Benclamid

What Benclamid Treats: Main Uses and Benefits

Benclamid is commonly used to help with the core condition associated with high blood glucose levels. The medication is commonly used when supportive symptom management is appropriate. It is considered relevant in contexts involving heightened systemic burden.

Benclamid is generally applied in addressing symptoms that interfere with daily comfort.

Easing Periods of Heightened Systemic Imbalance

Benclamid is commonly used across conditions presenting with systemic or localized discomfort. It is applied when symptoms related to systemic imbalance become more noticeable and create noticeable physiological strain, supporting patients during these difficult symptomatic phases. It helps address symptom clusters that may become intense or disruptive. It is relevant in conditions characterized by periods of heightened symptoms, which are often episodic.

Supporting Functional Stability and Well-being

The medication helps maintain a sense of stability when symptoms are more noticeable and contributes to improved comfort. It is used in situations involving certain distressing symptoms and applied across domains where additional symptomatic support is needed.

Quick Fact: Relevant for Physiological Strain

Regulatory References

  1. MedlinePlus Drug Information

Eligibility and Restrictions for Use

Benclamid (Glibenclamide/Glyburide) is officially approved for use in adult patients with Type 2 Diabetes Mellitus. Its eligibility is strictly defined by regulatory documents that list specific population contraindications and limitations.

Contraindications (Must Not Use)

The medicine is contraindicated in patients with Type 1 Diabetes Mellitus, Diabetic Ketoacidosis, or those with known hypersensitivity to Glibenclamide, other sulfonylureas, or sulfonamide derivatives. Use is prohibited in patients with severe renal impairment or severe hepatic impairment due to the risk of prolonged hypoglycemia, and when administered concurrently with the drug Bosentan.

Population Restrictions (Conditional Use)

Population Group Regulatory Status
Pregnancy/Lactation Contraindicated/Not Recommended; insulin is the preferred pharmacological treatment
Pediatric Patients Safety and efficacy of tablets have not been established; generally not recommended
Older Adults (Geriatric) Restricted population due to high susceptibility to severe hypoglycemia
Acute Stress Conditions Temporary discontinuation and switch to insulin is required (e.g., severe infection, surgery)

What should I know about interactions with other medicines?

Interactions with other medicines and products

Benclamid (Glibenclamide) has officially documented interactions that may alter its efficacy or increase the risk of adverse outcomes, as specified in regulatory labeling.

Classification Documented Interaction Requirement
Contraindicated Combination Bosentan co-administration is strictly prohibited due to an increased risk of elevated liver enzymes (hepatotoxicity).
Timing Separation Rule Administration of the bile acid sequestrant colesevelam must be separated by at least 4 hours prior to a Glibenclamide dose to avoid reduced absorption.
Alcohol Restriction Alcohol consumption carries an unpredictable risk of potentiating or weakening the drug's blood sugar-lowering effect; acute consumption significantly increases the risk of severe hypoglycemia.

Co-administration with various medicinal product categories can impact blood glucose control. Drugs documented to potentiate Glibenclamide's action include NSAIDs, ACE inhibitors, and Miconazole. Conversely, drugs that may weaken the hypoglycemic effect include Thiazide diuretics, Corticosteroids, and Rifampin. The interaction with Rifampin is linked to the induction of metabolic enzymes ( CYP2C9/3A4), which increases Glibenclamide's clearance.

Interaction risk is also officially heightened in certain populations: patients with severe hepatic or renal insufficiency may experience reduced drug clearance, leading to elevated Glibenclamide levels and an increased risk of prolonged hypoglycemia. Elderly patients ( 65 years and older) are also cited as being particularly susceptible to these hypoglycemic reactions.

Mechanism of Action

Targeting the K ATP Channel for Insulin Release

Benclamid's action begins at the pancreatic beta-cell membrane by acting as a blocker of the Sulfonylurea Receptor 1 ( SUR1), a regulatory component of the ATP-sensitive Potassium (K ATP ) Channel complex. This molecular interaction causes the channel to close, stopping the normal flow of K^+ ions out of the cell. This primary action initiates the entire mechanism by altering the cell's electrical potential.


The Ca^2+-Mediated Secretagogue Cascade

The closure of the K ATP channel causes the beta-cell membrane to depolarize, a critical electrical change that immediately triggers the opening of voltage-gated Ca^2+ channels. The resultant rapid influx of calcium ions ( Ca^2+) acts as the direct physiological signal, triggering the exocytosis of stored insulin into the bloodstream. This surge of secreted insulin promotes the uptake of glucose into peripheral tissues and inhibits the liver's glucose production.


Mechanistic Dependence and Systemic Effect

The mechanism is entirely reliant on the presence of functional beta-cells capable of synthesizing and storing insulin, representing an inherent constraint on this action. When viable beta-cells are present, the enhanced release of insulin results in the physiological consequence of lowering circulating blood glucose concentration.

Dosage and Administration Information

Benclamid, which contains the active substance Glibenclamide, is an oral medication taken strictly by mouth in tablet form. The administration schedule requires that the dose be taken once daily with breakfast or the first main meal of the day to align with usage guidelines.

Dosing regimens are precisely defined by the specific formulation used. For the conventional tablet, the usual starting dose is 2.5 mg to 5 mg daily, with the total daily intake maintained within a range up to a specified maximum of 20 mg. If the prescribed daily dose exceeds 10 mg in the standard formulation, the intake may be divided into two separate, equal doses. In contrast, the maximum daily intake for the micronized tablet formulation is limited to 12 mg.

Any adjustment to the dosage must follow a controlled schedule to establish the final, long-term regimen. Increases must be made in controlled increments of no more than 2.5 mg (for the standard tablet) at mandatory intervals of at least one week to assess glycemic response. It is crucial to note that the conventional and micronized tablet forms are not bioequivalent and switching between them requires a complete re-titration process.

For older adult patients and those with documented hepatic or renal impairment, a conservative approach is utilized, requiring a lower initial dose, such as 1.25 mg daily for the standard tablet. If a dose is missed, the standard protocol is to skip the forgotten dose entirely and proceed with the next scheduled dose with the next meal to avoid taking two doses on the same day.

Recent Clinical Evidence

Research Evidence / Overview of Studies for Benclamid

Evidence for use in Type 2 Diabetes Mellitus

Research exploring Benclamid (Glibenclamide) has primarily focused on its evaluation in adults diagnosed with Type 2 Diabetes Mellitus through Randomized Controlled Trials (RCTs) and systematic reviews. Researchers examined key biomarkers, specifically tracking Glycated Hemoglobin ( HbA1c) levels and measurements of fasting and postprandial blood glucose. The overall body of evidence related to the evaluation of blood sugar levels is generally classified as High quality, reflecting the volume and structure of the research. In a broader context, studies also monitored long-term event rates related to cardiovascular outcomes and all-cause mortality. However, data are still emerging, and studies consistently describe data variability regarding a commonly tracked metabolic outcome across comparative groups.

Evidence for use in Gestational Diabetes Mellitus (GDM)

Benclamid was studied in women diagnosed with Gestational Diabetes Mellitus (GDM) requiring pharmacological treatment. Comparative trials monitored outcomes related to maternal blood sugar management and tracked neonatal outcomes such as birth weight and measurements of neonatal hypoglycemia. Findings varied across studies. While measurements of maternal blood sugar control were tracked alongside other agents in some trials, certainty remains low regarding the comparative profile for the newborn due to limited and heterogeneous evidence.

Research Gaps and Uncertainties

Long-term effects are not fully characterized against other established pharmacological options, as follow-up durations for many older trials were limited. Data for certain complex subgroups, such as children or elderly populations, remain insufficient. Furthermore, evidence highlights what is known—and what is still uncertain—about the medication, and research is ongoing to fill these knowledge gaps.

Key Studies & References Glibenclamide and risk of adverse pregnancy outcomes: a systematic review and meta-analysis

Frequently Asked Questions (FAQ)

Common questions about Benclamid (FAQ)

Q: Is Benclamid the same drug as Glyburide?

Yes, according to official product information, Benclamid contains the active substance Glibenclamide. Glibenclamide is recognized internationally and is marketed under the name Glyburide in some regions.

Q: How is Benclamid different from lifestyle changes like diet and exercise for managing blood sugar?

Benclamid is a medication that works by actively encouraging the specialized cells in the pancreas to release stored insulin, which is a chemical action. This is distinct from diet and exercise, which manage blood sugar through metabolic and physiological changes. Official sources state Benclamid is used when blood sugar is not adequately controlled by diet and exercise alone.

Q: How long after starting Benclamid does it take to see effects on blood sugar?

The medication has a relatively long duration of action in the body. Due to this, official guidance requires controlled dosage adjustments at intervals of at least one week. This schedule is designed to assess the drug’s glycemic response.

Q: What medical history should a patient share before starting Benclamid?

Patients are generally advised to share any history of Type 1 diabetes, diabetic ketoacidosis, or known hypersensitivity to sulfonylureas or sulfonamide derivatives. History of severe renal (kidney) or hepatic (liver) impairment is also critical, as official documents prohibit the use of the drug in these conditions.

Q: How can I know if Benclamid is actually working for me?

The effectiveness of the drug is generally evaluated by healthcare providers using key measurements. These include tracking Glycated Hemoglobin (HbA1c) levels, as well as measurements of fasting and postprandial (after meal) blood glucose.

Q: Is there a higher risk of hypoglycemia with Benclamid compared to other diabetes medicines?

Official reports from some regulatory bodies indicate that Glibenclamide, the active ingredient in Benclamid, is associated with a higher risk of low blood sugar (hypoglycemia) compared to some other sulfonylurea medications.

Q: Does Benclamid cause weight gain?

Weight gain is a frequently reported adverse effect associated with the use of Glibenclamide.

Q: Can Benclamid cause skin reactions or a rash?

Yes, official documentation lists adverse reactions affecting the skin and subcutaneous tissue. These documented effects include pruritus (itching), rash, and photosensitivity reactions (increased sensitivity to light).

Q: Are there any over-the-counter pain relievers or anti-inflammatory drugs that interact with Benclamid?

The official labeling documents an interaction with Non-Steroidal Anti-Inflammatory Drugs (NSAIDs). The co-administration of Glibenclamide with NSAIDs is documented to potentiate, or increase, the drug’s blood sugar-lowering effect.

Q: How does Benclamid work differently than Metformin?

Benclamid functions as an insulin secretagogue, meaning it works by directly stimulating the pancreas to release insulin. In contrast, another widely used agent, Metformin, primarily works by reducing the amount of sugar produced by the liver and helping the body better utilize existing insulin.

Q: What is the difference between Benclamid and other sulfonylurea drugs like Gliclazide?

Benclamid belongs to the second-generation sulfonylurea class of drugs. Official reports from some government regulatory bodies have noted that it is associated with a higher risk of adverse cardiovascular outcomes and hypoglycemia compared to certain other sulfonylureas, such as Gliclazide.

Q: Why might a doctor switch a patient from Benclamid to another sulfonylurea?

Decisions regarding switching medication regimens often relate to the susceptibility to adverse reactions, such as the potential for severe hypoglycemia. Official safety notes highlight this particular susceptibility in older adult patients or those with impaired renal (kidney) or hepatic (liver) function.

Q: Does Benclamid have active metabolites that stay in the body for a long time?

Yes, Glibenclamide is metabolized into two major products that are pharmacologically active. These active metabolites may contribute to the drug's blood sugar-lowering effect for a prolonged duration.

Q: Why do some sources suggest avoiding Benclamid in patients with renal impairment?

The official documents indicate that patients with severe renal (kidney) insufficiency may experience reduced drug clearance. This reduction can lead to elevated levels of Glibenclamide in the body and increase the risk of prolonged, dangerous hypoglycemia (low blood sugar).

Q: Is it normal to feel dizzy or shaky when starting Benclamid?

Feelings of dizziness or shakiness are described as possible signs of hypoglycemia (low blood sugar). Hypoglycemia is noted in official documentation as the most commonly documented adverse reaction to the medication.

Q: Can Benclamid affect blood cell counts in rare cases?

Yes, official safety information documents that changes in blood cell counts are rare adverse reactions. These effects, which include leucopenia and agranulocytosis, affect the blood and lymphatic system.

Q: Is Benclamid safe to take during pregnancy or while breastfeeding?

Official documentation lists the use of Benclamid as Contraindicated or Not Recommended during pregnancy and while breastfeeding. Insulin is noted as the preferred pharmacological treatment in these situations.

Q: What is the difference between the conventional tablet and the micronized tablet of Benclamid?

The conventional and micronized tablet forms are officially described as not bioequivalent, meaning they may not work the same way in the body. Because of this difference, they also have distinct maximum daily dosages, and switching between them involves a complete re-titration process.

Q: Can Benclamid affect my heart health?

Research has examined the medication's impact on long-term event rates related to cardiovascular outcomes. Some regulatory bodies note an association with a higher risk of adverse cardiovascular outcomes compared to some other similar agents.

Q: Is there a special diet required when taking Benclamid?

Official documents state that Benclamid is used as an adjunct to diet and exercise to manage blood sugar. Regulatory guidance specifies that the dose should be taken with the first main meal of the day.

Q: Does my risk of side effects increase if I am undernourished or have irregular meal times?

Official safety notes indicate that the risk of hypoglycemia is increased in individuals with deficient caloric intake or in those who are malnourished. Regulatory guidance specifies that the dose should be taken with the first main meal of the day.

Q: What happens if I stop taking Benclamid suddenly?

Benclamid works by stimulating the release of insulin. Stopping the medication would result in the loss of this mechanism of action, which would cease to help lower and manage circulating blood glucose concentration.

Q: Is it true that Benclamid can have non-linear effects on blood glucose control at higher doses?

Dosage regimens are precisely defined with specific maximum daily intakes for the conventional and micronized tablet forms. Controlled dose increments are mandated by regulatory guidance to properly assess the drug's glycemic response.

How should Benclamid be stored and disposed of?

How to Store and Dispose of Benclamid

The storage and disposal of Benclamid (Glibenclamide) must strictly follow the conditions specified in official regulatory labeling.


Storage Requirements

The medication must be stored at room temperature, generally not exceeding 30mathrmC, and should be kept from freezing. To maintain its stability, the product must be protected from light and moisture and stored away from excess heat. It is a mandatory requirement to keep the tablets in the original, tightly closed container and always ensure they are kept out of the sight and reach of children.


Disposal Instructions

Official documents mandate that any unused or expired Benclamid must be disposed of in accordance with local requirements. There are typically no special handling requirements; however, outdated medicine should be discarded properly. Patients may consult a healthcare professional regarding the disposal of unused medicine, often recommending a local drug take-back program.

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

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