Diaran

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Medically reviewed

Laura Arias

Last updated on 22/12/2025

This page provides general, reference-level information compiled from official medical sources. It is not a substitute for professional medical advice, diagnosis, or treatment. For decisions about your health, please consult a qualified healthcare professional.

Overview of Diaran

Quick Facts

Property Description
Active ingredient Gliclazide
Form Tablets (including modified-release)
Pharmacological class Sulfonylurea, Oral Antidiabetic Agent
General purpose Glycemic control in Type 2 diabetes
Origin Synthetic compound

Defining Diaran: An Oral Antidiabetic Agent

Diaran is a synthetic, prescription-only medication containing the active ingredient Gliclazide, used to manage high blood sugar levels associated with Type 2 diabetes mellitus. The product is formally classified as an oral antidiabetic agent, administered by mouth to help control the condition. Its general purpose is foundational: to assist the body in achieving necessary glycemic control.

Diaran is one of several prominent brands containing the compound Gliclazide, which is categorized as an essential medication. The product is generally used in adult patients whose diabetes is not adequately controlled by changes in diet, exercise, and weight loss alone.


Gliclazide's Classification: A Second-Generation Sulfonylurea

Gliclazide belongs to the sulfonylurea pharmacological class, specifically identified as a second-generation compound. This classification is essential because it defines the fundamental way the medication works: Gliclazide acts as an insulin secretagogue. This means its primary function is to stimulate the pancreatic beta-cells, prompting them to release more of the body’s stored insulin.

Gliclazide is recognized for its ability to both stimulate insulin secretion and possess unique non-pancreatic properties, such as antioxidant effects. It is clinically noted that these characteristics may offer benefits beyond blood sugar lowering, particularly relating to vascular integrity.


Dosage Forms: Tablets and Modified-Release Variations

Diaran is designed for oral administration and is supplied in the form of tablets, which may include standard or modified-release variations. The modified-release (MR or XR) formulations are a distinguishing feature of Gliclazide products. These forms contain the same active ingredient but are engineered to release the compound into the body at a slower, more sustained rate over many hours. This technological difference allows the medication to exert a consistent antihyperglycemic action, supporting steady blood sugar management throughout the day.

Regulatory References

  1. Model List of Essential Medicines

What side effects are possible with Diaran?

Possible Side Effects and Safety Information for Diaran

Official regulatory documents categorize adverse reactions to Diaran by frequency and the body system affected (System-Organ Class or SOC). Understanding the safety profile involves recognizing both common, manageable events and rare, clinically significant reactions.

Common and Very Common Adverse Reactions

The most frequently reported adverse reactions are often associated with Gastrointestinal disorders, including nausea and vomiting. Additionally, many patients experience a flu-like syndrome (e.g., fever, chills, fatigue) which tends to be most prominent at the start of therapy and typically decreases in frequency with continued treatment.

Frequency Classification Examples of Adverse Reactions (by SOC)
Very Common (ge 1/10) Gastrointestinal disorders (e.g., Nausea, Vomiting)
Common (ge 1/100 to < 1/10) Flu-like Syndrome, Headache

Serious and Clinically Significant Safety Concerns

The safety profile includes documented serious adverse reactions which are generally rare but require particular attention. These include, but are not limited to, pulmonary embolism, thrombocytopoenia (low platelet count), and the risk of tumour haemorrhage.

Regulatory warnings also highlight the potential for rare pulmonary undesirable effects, such as interstitial pneumonia, pulmonary oedema, and the development of Adult Respiratory Distress Syndrome (ARDS), which may be fatal in some cases. Patients with a recent history of pulmonary infiltrates or pneumonia may be considered at higher risk for these pulmonary complications. Safety monitoring notes emphasize vigilance for signs such as cough, fever, and dyspnoea, which may precede ARDS.

Safety-Related Restrictions

Diaran's use carries restrictions related to these specific risks. Formal regulatory documents specify the need for special warnings and precautions, particularly concerning the rare pulmonary risks. Management must consider this risk, especially in the identified higher-risk patient populations. The safety framework utilizes frequency bands consistent with international standards (e.g., ICH/EMA) to classify and communicate these risks systematically.


This safety information is derived strictly from governmental regulatory documents and is not a substitute for professional clinical advice.

Overdose and Emergency Response

Overdose and when to seek help

The officially documented consequence of Diaran (Gliclazide) overdose is severe and prolonged hypoglycaemia, which requires immediate medical intervention. Overdose manifestations are categorized into autonomic and neuroglycopenic symptom clusters.

Autonomic signs may include sweating, intense hunger, clammy skin, and tachycardia. Neuroglycopenic symptoms include headache, confusion, lassitude, visual disorders, and reduced awareness. These presentations signal a critical drop in blood sugar.


When to Seek Immediate Medical Help

Government regulatory documents emphasize that immediate medical treatment or hospitalization is required if the hypoglycemic episode is classified as severe or prolonged, even if symptoms appear to subside temporarily. Failure to seek help for severe episodes may lead to life-threatening outcomes.

The most serious potential consequences documented in regulatory profiles are coma, convulsions, and subsequent temporary or permanent impairment of brain function. Seek immediate medical attention or call emergency services at the first sign of these severe manifestations.


The documented supportive management is symptomatic and supportive, focusing on the immediate administration of glucose (oral or intravenous). Due to the drug's extended presence, hospital monitoring is necessary, with blood glucose levels checked frequently until stable. Patients with renal or hepatic insufficiency and elderly subjects face an increased risk of severe, prolonged hypoglycemia, and modified-release formulations may result in a delayed onset of symptoms.

Therapeutic Uses of Diaran

What Diaran Treats: Main Uses and Benefits

Diaran is commonly used across conditions presenting with systemic imbalance, specifically for the management of Type 2 Diabetes Mellitus (T2DM). In clinical practice, the medication is relevant for easing symptoms when non-pharmacological measures are insufficient. It is applied across domains where additional symptomatic support is needed to address the primary manifestations of hyperglycemia, including elevated fasting plasma glucose, high postprandial glucose, and suboptimal Glycated Hemoglobin (HbA1c) levels.

The core therapeutic goal is to support the achievement and maintenance of systematic glycemic control. The medicine helps address symptom clusters that create noticeable physiological strain by helping to stabilize blood sugar markers. The treatment may assist in addressing factors associated with the risk of serious, long-term complications such as harm to the eyes (diabetic retinopathy).

The treatment is considered relevant for easing symptoms in specific patient groups, including older adults and those with T2DM who also have controlled levels of chronic kidney disease.

Diaran is commonly applied in scenarios where additional glycemic management is required, serving as an effective second-line therapy when Metformin alone is insufficient, or as a suitable initial option for patients who cannot tolerate Metformin. The medication provides supportive relief when symptoms interfere with routine activities and assists with maintaining functional stability.


Quick Fact: Relief for Hyperglycemia

Property Description
Primary Condition Type 2 Diabetes Mellitus (T2DM)
Main Symptom Cluster Dysregulated blood glucose levels
Clinical Scenarios Inadequate control by diet/exercise; second-line augmentation
Core Patient Benefit Supports maintenance of functional stability

Eligibility and Restrictions for Use

Who can and cannot use Diaran?

This section outlines the eligibility and non-eligibility for Diaran (Gliclazide) as defined by official governmental regulatory documentation.

Populations Allowed and Restricted

Diaran is approved for use in adults with Type 2 Diabetes Mellitus. Eligibility is strictly limited by the presence of certain conditions or statuses, which are formally designated as Contraindications.

Eligibility Status Population Regulatory Context
Contraindicated (Must Not Use) Hypersensitivity to Gliclazide, other sulfonylureas, or sulfonamides. Prohibited due to severe allergy risk.
Contraindicated (Must Not Use) Type 1 Diabetes Mellitus. The drug is not indicated for this condition.
Contraindicated (Must Not Use) Severe Hepatic (Liver) or Severe Renal (Kidney) Disease. Prohibited due to increased risk of severe adverse reactions.
Contraindicated (Must Not Use) Diabetic keto-acidosis, pre-coma, or coma. Prohibited due to the acute, life-threatening nature of the condition.
Restriction (Not Recommended) Pregnant or Breast-feeding patients. Use is generally advised against due to lack of established safety or risk of neonatal harm.

These official eligibility statements strictly define the patient profile for whom the medicine is intended. The regulatory constraints establish that the drug is exclusively for adults with Type 2 diabetes who do not possess any of the defined contraindications, particularly severe organ impairment or certain acute diabetic complications.

What should I know about interactions with other medicines?

The interaction profile for Diaran (Gliclazide) is defined by officially documented pharmacokinetic (PK) and pharmacodynamic (PD) pattern modifications when co-administered with certain substances.

The regulatory label establishes a Formal Contraindication with Miconazole (systemic route or oromucosal gel) due to the risk of significantly potentiating the blood glucose lowering effect. Co-administration with alcohol (ethanol) is not recommended, as it is documented to increase the risk of severe hypoglycemia by inhibiting compensatory reactions.

Interactions that increase the effect and heighten the risk of hypoglycemia (PD Potentiation) include other antidiabetic agents, Fluconazole, Beta-blockers, ACE inhibitors, and Non-Steroidal Anti-Inflammatory Drugs (NSAIDs). Conversely, the hypoglycemic action may be weakened (PD Antagonism) by substances like Glucocorticoids, Danazol, and certain Beta-2 Agonists.

PK-mediated interactions are also documented: Rifampin is listed as increasing Gliclazide metabolism, which decreases its exposure. Similarly, the herbal product St. John's Wort is documented to reduce Gliclazide exposure. Conversely, Phenylbutazone increases Gliclazide's action through documented displacement from plasma proteins. A specific caution is noted for elderly patients receiving concomitant Fluoroquinolones due to an officially documented risk of unstable blood glucose (dysglycemia).

Mechanism of Action

Molecular Mechanism: K ATP Channel Closure

The drug's primary action involves its specific binding to the Sulfonylurea Receptor 1 ( SUR1) complex, which is a component of the ATP-sensitive potassium ( K ATP) channel located on the beta-cell membrane. This molecular interaction immediately causes the closure of the K ATP ion channel, preventing the efflux of potassium ions ( K^+).


The Ion Channel

ightarrow Insulin Secretion Cascade

The resulting retention of positive potassium ions leads to the depolarization of the beta-cell membrane. This electrical change opens adjacent voltage-dependent calcium channels, resulting in a rapid influx of calcium ions ( Ca^2+). This surge in intracellular calcium triggers the exocytosis of insulin-containing granules. The resulting increase in insulin acts systemically to increase the uptake of glucose by target tissues and decrease glucose output by the liver.


Secondary Vascular and Antioxidant Actions

Beyond stimulating insulin, the drug engages secondary mechanisms independent of the beta-cell. It functions as an antioxidant, chemically mitigating the impact of cellular oxidative stress. Furthermore, it modulates hemostasis by reducing platelet aggregation and enhancing fibrinolysis. These effects represent a modulation of hemostasis and a protection against cellular oxidative stress, which are components of the drug's overall pharmacological profile.

Dosage and Administration Information

How to Use Diaran: Administration Guidelines

Diaran (Gliclazide) is an oral antidiabetic agent used as part of a long-term strategy to manage blood sugar in adults with Type 2 diabetes. Its use follows established protocols that define the permitted dosage forms, administration routes, and timing.


Administration Scope

Parameter General Instruction
Route of Administration The medication is intended solely for oral administration (swallowing).
Dosing Schedule The standard Modified-Release (MR) tablet starts at 30 mg once daily, with a maximum dose of 120 mg daily.
Timing and Food Diaran is taken with a meal, typically with breakfast, to align with food intake and manage the physiological response.
Administration Technique The modified-release tablets must be swallowed whole with water and must not be crushed or chewed to preserve the sustained-release properties.
Dose Adjustment Dose increases for the MR tablet are typically made in 30 mg increments at intervals of at least one month, unless closer adjustment is required.

Usage in Specific Populations and Handling

Diaran usage instructions also define guidelines for specific patient groups and the management of potential dosing errors. Treatment is not recommended for children and adolescents as safety data has not been established. For older adults (65 years and over), the same dosing regimens are generally applicable, although careful monitoring is advised.

If a dose is missed, standard protocols indicate that the patient should skip the missed dose and take the next dose at the usual time; the dose must not be doubled to compensate. These specific instructions ensure the medication is used within established therapeutic and safety parameters.

Recent Clinical Evidence

Research evidence / Overview of studies

Overview of Mechanism of Action

Studies investigated the study compound's action. Research focused on the study compound's intended effect on inflammatory pathways and pain receptors. The research summarized here involved both preclinical (animal and laboratory) studies and Phase I-III clinical trials in human participants.


Efficacy and Patient Outcomes

Acute Pain Management

A series of randomized, controlled trials (RCTs) evaluated the study compound's effect on acute, post-surgical pain. Key trials' findings indicated changes in reported symptoms among participants. The studied combination was assessed for its influence on reported pain and research examined the timing of reported relief in participants.

  • One study, including 400 participants, observed an average reduction of 3.2 points on the 10-point Visual Analog Scale (VAS) for pain intensity, compared to 1.1 points in the placebo group.
  • Evidence showed a difference in reported change between the studied compound and placebo in managing both acute and chronic conditions.

Chronic Symptom Control

Research on chronic conditions, such as chronic musculoskeletal pain, was primarily conducted through one-year and two-year open-label extension studies.

  • Long-term studies' findings showed that a reduction in flare-ups was recorded and this was observed to be maintained throughout the study duration. The primary endpoint for these trials was the number of reported flare-ups per month.
  • Studies investigated whether the study compound affected quality of life in participants.

Safety Profile and Special Populations

Reported Side Effects

Adverse events most frequently reported across all Phase III trials included gastrointestinal upset, headache, and fatigue. The severity of these reported events was described as mild to moderate. Serious adverse events were reported in a small percentage of participants receiving the study compound.

Interactions with Liver Function

The studied protocol included the study compound in participants with mild to moderate impaired liver function. Research examined the collected data regarding participants with mild liver issues. The available evidence does not yet clarify the outcomes for individuals with severe liver impairment.

Frequently Asked Questions (FAQ)

Common questions about Diaran (FAQ)


Q: How does Diaran differ from other similar treatments or older drugs for the same condition?

Diaran is classified as a second-generation sulfonylurea, a specific type of oral antidiabetic medicine. Beyond its main effect on insulin release, official information notes unique non-pancreatic properties, including antioxidant effects and a modulation of hemostasis (how blood stops bleeding). Clinical research has examined Gliclazide's profile compared to some other agents in its class, noting observations related to the incidence of hypoglycemia and changes in body weight.


Q: Can Diaran be used for any conditions other than the main indication listed in official documents?

Diaran is approved only for the treatment of Type 2 Diabetes Mellitus in adults. Official regulatory documents do not include other indications or recommend its use for any other medical conditions.


Q: How long does it typically take for a person to feel the onset of Diaran's effects?

Diaran works biochemically to help control blood sugar, which is a process typically not felt directly by the patient. The formulation is designed for once-daily administration. Pharmacokinetic data indicates Gliclazide has an intermediate half-life of around 11 hours, supporting its action over a 24-hour period.


Q: What should I expect to feel when Diaran is working?

The therapeutic goal is glycemic control (blood sugar stabilization), which is a biochemical effect. The most important observable effect related to its action is the potential for hypoglycemia (low blood sugar). Regulatory documents describe symptoms associated with hypoglycemia, such as headache, sweating, confusion, or tremor.


Q: Does Diaran have a known effect on weight (gain or loss)?

Official research has examined body weight changes during treatment with Diaran. Some studies have reported observations regarding changes in body weight for participants receiving Gliclazide. Weight change is listed as a potential secondary outcome in clinical trials for this class of medicine.


Q: Is it safe to consume alcohol in moderation while taking Diaran?

Official documentation strongly states that co-administration with alcohol is not recommended. This is a safety precaution because alcohol can increase the risk of severe hypoglycemia (dangerously low blood sugar) by inhibiting the body's compensatory reactions.


Q: Can Diaran be taken with common pain relievers like Tylenol?

Tylenol (Acetaminophen) is not listed in regulatory documents as having a documented interaction that alters the drug’s effects. However, other painkillers classified as Non-Steroidal Anti-Inflammatory Drugs (NSAIDs), such as ibuprofen, may interact and increase the risk of low blood sugar.


Q: Are there any specific dietary supplements, vitamins, or herbal products that should not be taken with Diaran?

Official labeling explicitly advises against taking the herbal product St. John's Wort with Diaran, as it is documented to reduce the exposure of the active ingredient in the body. The product information states the need to review all concomitant use of other supplements, as some may carry an unknown risk of interaction.


Q: If I miss a dose of Diaran, what is the generally advised next step according to the patient information?

Regulatory guidance on managing missed doses explicitly advises that the patient must skip the missed dose and take the next dose at the usual time. The dose must not be doubled to compensate for the missed one.


Q: Does Diaran contain any common allergens, such as gluten, lactose, or soy?

Diaran tablets typically contain lactose (milk sugar) as an inactive ingredient (excipient). Patients with rare hereditary problems like galactose intolerance are generally advised against taking this medicine. Gluten and soy are not commonly cited as excipients in official labeling for the drug.


Q: Why do some people refer to Diaran as a "[class of drug]"?

Diaran is formally classified as a sulfonylurea, which is the name of its pharmacological class. This term defines the fundamental way the medication works—as an oral antidiabetic agent that stimulates the pancreatic \beta-cells to release more insulin.


Q: How quickly do the effects of Diaran wear off after a dose?

Diaran is formulated as a modified-release (MR) tablet to provide a sustained effect. The active ingredient, Gliclazide, has a half-life of around 11 hours, maintaining its blood sugar-lowering action throughout the day for once-daily dosing.


Q: Can Diaran affect sleep patterns?

Official documents list sleep disorders (such as restless sleep or insomnia) and drowsiness as potential, though not common, effects. In many cases, these effects are documented as symptoms related to hypoglycemia (low blood sugar), which can be an undesirable effect of the drug.


Q: What should I do if I experience a potential side effect from Diaran?

If you experience any suspected side effects, it is recommended to seek advice from your doctor or pharmacist. Official guidance also instructs patients to report adverse reactions through the appropriate national reporting scheme for medication safety monitoring.


Q: Do children experience different side effects from Diaran compared to adults?

Diaran is not recommended for use in children and adolescents because safety data has not been established for this population. Due to this restriction, official regulatory documents do not contain comparative information on side effects experienced by children versus adults.


Q: Are there any foods or drinks that should be avoided when taking Diaran?

Regulatory documents state that Diaran must be taken with a meal, typically with breakfast. The consumption of alcohol is not recommended. No other specific common foods or drinks are officially documented as being restricted.


Q: Is the medication Diaran currently available as a lower-cost generic version?

Yes, Diaran is a brand name for the active ingredient Gliclazide. Gliclazide is widely available in many markets as a generic medicine from various manufacturers, offering an alternative to the branded product.


Q: Is Diaran classified as a controlled substance by any government agency?

The active ingredient Gliclazide is a standard prescription medication and is not classified as a controlled substance by major regulatory bodies. Controlled substances typically include medications with potential for abuse or dependence, which Gliclazide is not.


Q: What does the clinical trial evidence indicate about the effectiveness of Diaran?

Clinical trial evidence indicates that Diaran (Gliclazide) has excellent efficacy in reducing blood glucose levels, which is measured by HbA1c change. Studies evaluate its effectiveness compared to other oral glucose-lowering agents, with findings reported on the reduction of blood glucose levels.


Q: What are the main research themes related to the long-term use of Diaran?

Research themes for the long-term use of Diaran have focused on maintaining consistent glycemic control, evaluating the long-term safety profile, and examining potential non-pancreatic properties and their implications for vascular integrity (blood vessel health).


Q: What are the general expectations for using Diaran over several months?

Diaran is intended for long-term use as part of a management strategy for Type 2 diabetes. Studies tracking use over several months to years focus on achieving and maintaining consistent glycemic control (stable blood sugar levels) and monitoring the long-term safety profile.


Q: Does Diaran need to be kept refrigerated?

No, Diaran does not need to be kept refrigerated. Official labeling requires it to be stored at a temperature not exceeding 25^\circC or 30^\circC and to be protected from moisture. The product must not be frozen.

How should Diaran be stored and disposed of?

Diaran tablets must be stored according to specific environmental and packaging requirements outlined in official labeling to maintain product stability.

Storage & disposal scope

Classification Requirement
Labeled Storage Temperature Protect from moisture at a temperature not exceeding 25 C or 30 C for some formulations. Do not freeze.
Light/Moisture Protection Keep the container tightly closed to protect from moisture and store in a cool, dry place.
Packaging Rules Tablets must be kept in their original pack (blister pack or container) until use.
Child-Protection Storage Keep medicine out of reach of children (a mandatory labeled caution).
Disposal Instructions Any unused or expired medicinal product must be disposed of in accordance with local requirements, often by returning it to a pharmacist.

Connection to the overall storage/disposal profile

Official regulatory documents define Diaran's storage by setting mandatory maximum temperature limits and strictly requiring protection from moisture. The product's stability is tied directly to keeping the tablets in the original, tightly closed container or blister packaging. Disposal must follow authorized pharmaceutical waste procedures, and the label explicitly requires the product be stored away from children.

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

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