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Хлорпропамид

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Хлорпропамид

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Medically reviewed

Marina Burgos

Last updated on 10/01/2026

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

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Overview of Хлорпропамид

Property Description
Active Ingredient Chlorpropamide (INN)
Form Tablet
Pharmacological Class Oral Hypoglycemic Agent (First-Generation Sulfonylurea)
General Purpose To lower and stabilize high blood sugar levels
Origin Synthetic

What Type of Medicine is Хлорпропамид? (Identity and Classification)

Хлорпропамид (Chlorpropamide) is a synthetic medicine belonging to the class of drugs known as Oral Hypoglycemic Agents, which are used to help manage high blood sugar levels. Specifically, it is identified as a First-Generation Sulfonylurea.

This drug is a single-ingredient product, meaning its effect comes solely from the active substance, Chlorpropamide. This pharmacological activity is clinically recognized. Sulfonylureas help manage long-term blood sugar levels.


What is the Form and Composition of Хлорпропамид? (The Product Identity)

The medication is supplied in the form of a tablet, designed for simple Oral administration (taken by mouth).

The core of the product is the active ingredient, Chlorpropamide (INN). This active substance is combined with necessary solid excipients—such as fillers, binders, and other components—that are standard for creating a stable, easy-to-swallow tablet form. As an older generation sulfonylurea, it has been a standard agent for adult patient groups requiring assistance with glucose control.


What is the General Purpose of Хлорпропамид? (Function and Goal)

The general purpose of this medicine is to help the body effectively lower and stabilize elevated blood sugar levels. It achieves this goal by acting directly on the pancreas.

The medication's primary function is to gently encourage the pancreas to release more of its own natural insulin into the blood. By increasing the amount of available insulin, the body is better able to utilize or store the glucose, thereby helping to maintain a healthier overall metabolic balance. Sulfonylureas work by stimulating the pancreatic beta-cells.

Regulatory References

  1. NIH/StatPearls
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What side effects are possible with Хлорпропамид?

Possible Side Effects and Safety Information

Chlorpropamide, a first-generation sulfonylurea, has an official safety profile primarily characterized by the risk of hypoglycemia (low blood sugar), which is the most common and expected adverse reaction associated with its therapeutic use. This effect is inherent to the medicine's function of lowering blood glucose.


Adverse reactions are classified by frequency and system-organ class, as documented in regulatory sources such as the FDA DailyMed label.

Systemic Adverse Reactions

Adverse effects are officially listed across multiple physiological systems:

  • Metabolism and Nutrition Disorders: Hypoglycemia, and the specific risk of Hyponatremia (low sodium) associated with the Syndrome of Inappropriate Antidiuretic Hormone Secretion (SIADH).
  • Blood and Lymphatic System Disorders: Rare but serious reactions include Leukopenia, Thrombocytopenia, Agranulocytosis, and Aplastic Anemia.
  • Hepatobiliary Disorders: Documented effects include Cholestatic Jaundice and transient elevation of liver enzymes.
  • Gastrointestinal Disorders: Common, milder effects include Nausea, Vomiting, and Diarrhea.
  • Skin and Subcutaneous Tissue Disorders: Reactions include Rash, Pruritus, and Photosensitivity.

Serious Safety Constraints

Regulatory documents define specific populations and conditions where the drug is restricted or contraindicated. Use is officially prohibited in individuals with severe hepatic (liver) impairment or severe renal (kidney) impairment due to the high risk of drug accumulation and prolonged, severe hypoglycemia. Furthermore, older adults are officially noted as having an increased susceptibility to both prolonged hypoglycemia and hyponatremia. The medication is not indicated for use in Type 1 Diabetes Mellitus or Diabetic Ketoacidosis.

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Overdose and Emergency Response

Overdose and when to seek help

Overdose of Chlorpropamide is officially documented as leading to severe hypoglycemia, the drug’s most serious manifestation. Severe hypoglycemia can progress to neurological escalation, including seizures, loss of consciousness, and coma, which carries a documented risk of permanent impairment of brain function or death.


Emergency Response Requirements

Action Required When to Seek Urgent Help (Label-Derived Phrasing)
Seek immediate medical attention and contact emergency services. Immediately if the person has collapsed, had a seizure, has trouble breathing, or cannot be awakened.

Management and Monitoring

Management procedures described in official regulatory documents focus on counteracting the severe hypoglycemia. This includes administering appropriate glucose therapy, such as intravenous glucose, and subsequent frequent feedings. Due to the drug’s long half-life (averaging approximately 36 hours), hospital monitoring is required for a minimum of 24 to 48 hours and often for up to 3 to 5 days to prevent hypoglycemia relapse. No specific chemical antidote is listed.

Population-Specific Notes: The risk of serious hypoglycemic reactions is officially stated to be higher in susceptible groups, particularly the elderly and those with underlying renal or hepatic insufficiency.

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Therapeutic Uses of Хлорпропамид

What Хлорпропамид treats: Main Uses and Benefits

Chlorpropamide is utilized to help manage the chronic condition of Type 2 Diabetes Mellitus in adults whose bodies retain some natural insulin function. It is applied in situations to address the chronic metabolic disturbance of persistently elevated blood sugar levels (hyperglycemia). The goal is to provide support that may assist with reducing and stabilizing blood glucose readings when lifestyle measures, such as diet and exercise, are considered insufficient.

This medication is commonly used as an adjunct therapy and may support sustained glycemic control over time. The key therapeutic benefit may contribute to improved overall metabolic balance, which supports easing the overall symptom load and helps maintain a sense of functional stability. The medication is relevant for managing conditions that present with systemic imbalance where symptoms may intensify temporarily, and is used to address the chronic metabolic disturbance.

By reducing the overall burden of chronic high blood sugar, the medication may assist patients in managing the factors associated with the long-term risk of developing serious diabetes-related complications, such as nerve damage, kidney impairment, or eye problems.

Quick Fact: Relief for Elevated Blood Glucose

Regulatory References

  1. NIH MedlinePlus Drug Information
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Eligibility and Restrictions for Use

Official Eligibility Profile for Chlorpropamide

Regulatory authorities define strict population eligibility for Chlorpropamide based on a patient’s health status and age. The medication is primarily intended for adults with Type 2 Diabetes Mellitus (T2DM) whose bodies still produce some natural insulin, used as an adjunct to diet and exercise.


Absolute Contraindications

Use of Chlorpropamide is prohibited in several patient populations, as stated in official labeling:

  • Patients with a known hypersensitivity or allergy to the drug or other sulfonylureas.
  • Patients with Type 1 diabetes mellitus.
  • Patients experiencing diabetic ketoacidosis (DKA).
  • Use during pregnancy is often contraindicated or strongly restricted.

Restricted or Conditional Use

Use requires special caution and monitoring for certain groups:

  • Impaired Renal or Hepatic Function: Due to the risk of severe, prolonged hypoglycemia, use is restricted and must be carefully supervised.
  • Geriatric Patients: Older adults require conservative dosing and close monitoring due to increased susceptibility to hypoglycemia.
  • Pediatric Patients: Safety and effectiveness in children have not been established.
  • Lactation: Use is not recommended as the drug is excreted into human milk.
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What should I know about interactions with other medicines?

Interactions with other medicines and products

Chlorpropamide's official interaction profile is defined by pharmacodynamic effects, specific substance reactions, and pharmacokinetic alterations.

Pharmacodynamic and Substance Interactions

Co-administration with other medicinal products can significantly alter the blood-glucose-lowering effect. These interactions are categorized as either potentiation (increasing the effect) or counteraction (decreasing the effect).

Interaction Type Examples of Interacting Substances
Potentiation Risk Nonsteroidal Anti-inflammatory Agents (NSAIDs), Monoamine Oxidase Inhibitors (MAOIs), Salicylates, Beta-Adrenergic Blocking Agents
Counteraction Risk Thiazides and other Diuretics, Corticosteroids, Oral Contraceptives, Phenytoin, Thyroid Products

Certain combinations are subject to specific restrictions. Co-administration with oral Miconazole is officially associated with the risk of severe hypoglycemia.

Exposure and Clearance Considerations

Chlorpropamide is highly protein-bound, and its exposure can be modified by co-administration with other highly protein-bound drugs, such as Coumarins or Probenecid. This pharmacokinetic interaction may increase the free drug concentration, leading to an intensified effect.

An officially documented drug-substance interaction exists with alcohol (ethanol), which may increase the risk of hypoglycemia and can produce a disulfiram-like reaction.

Furthermore, the drug's disposition is impacted by underlying health conditions. Patients with renal or hepatic insufficiency may experience prolonged hypoglycemic reactions due to slower clearance of the medication.

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Mechanism of Action

Targeting Pancreatic Ion Channels to Initiate Insulin Release

The primary mechanism involves the drug binding to the Sulfonylurea Receptor 1 ( SUR1) subunit of the ATP-sensitive Potassium Channel ( K ATP Channel), which subsequently inhibits its function on the pancreatic beta-cells. By blocking the channel and preventing the outflow of potassium ions ( K^+), the drug forces the beta-cell membrane to depolarize. This electrical change is the crucial step that opens Voltage-Gated Calcium Channels and enables a rapid influx of calcium ions ( Ca^2+). The resulting increase in intracellular calcium concentration triggers the beta-cells to release pre-synthesized insulin into the circulation.


Systemic Modulation of Glucose Homeostasis

The resulting surge of circulating insulin enhances the uptake and utilization of glucose by peripheral tissues like muscle and fat. This mechanism is complemented by the drug’s extrapancreatic action, which includes the suppression of the liver's internal process of hepatic gluconeogenesis (producing glucose), resulting in a reduced rate of glucose input into the systemic circulation. These combined actions—increased peripheral glucose clearance and decreased hepatic glucose production—establish a new physiological state with lower circulating glucose concentration.


Mechanistic Constraints and Ancillary Actions

The function of Chlorpropamide is fundamentally constrained by the requirement for residual pancreatic beta-cells capable of synthesizing insulin, meaning the mechanism is not operative when these cells are entirely absent. Additionally, a secondary, non-metabolic consequence of the drug's mechanism is its ability to modulate the responsiveness of kidney tubules to Antidiuretic Hormone ( ADH).

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Dosage and Administration Information

How to Use Chlorpropamide

Chlorpropamide is administered orally in tablet form, with its usage determined by a once-daily dosing protocol based on its extended presence in the body. This approach dictates both initial dosages and the method for adjusting the treatment.


Administration Protocol

The medication is to be taken once a day in the morning, typically with breakfast or the first main meal of the day. Due to its long biological half-life, this single-dose regimen ensures a stable presence of the drug over 24 hours.

Usage Entity Standard Regimen Population Adjustments
Route & Form Oral Tablet (100 mg, 250 mg) None
Initial Dose (Adult) 100 mg to 250 mg once daily Lower initial dose (100 mg to 125 mg) for older adults
Maintenance Dose Typically 100 mg to 500 mg daily Conservative dosing required for renal/hepatic impairment
Maximum Dose Up to 750 mg daily Not established for the pediatric population

Dosing Adjustment and Timing

A conservative approach to dosage changes is utilized. If necessary, dose adjustments should be made in small increments (50 mg to 125 mg) and should occur no more often than every 3 to 7 days to allow the body to reach a steady state. The total daily dose may be divided into two smaller doses if gastrointestinal discomfort is noted. If a dose is missed, it should be taken as soon as remembered, unless it is nearly time for the next scheduled dose, in which case the missed dose must be skipped.

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Recent Clinical Evidence

Research Evidence / Overview of Studies for Chlorpropamide


Evidence for use in Type 2 Diabetes Mellitus

Chlorpropamide was evaluated in research involving adults suffering from Type 2 Diabetes Mellitus, a condition characterized by functional limitations in blood sugar regulation. The primary type of studies are Randomized Controlled Trials (RCTs), in which scientists explored its action compared to placebo or other agents. In these studies, outcomes related to systemic or functional imbalance were monitored, such as glucose level and glycated hemoglobin (HbA1c) indicators.

Research describes measured changes in the dynamics of glucose and HbA1c levels observed in patient groups during the study period. Data show patterns related to some dynamics of these indicators in the observed populations. Results apply only to the studied populations, and studies help show what has been observed so far regarding short-term sugar monitoring.

Long-term effects are not fully established, and there is limited information on long-term outcomes. Sample sizes were modest in many studies, and evidence is limited regarding how much these results may persist or affect serious diabetes complications over time.


Evidence for use in Diabetes Insipidus

Chlorpropamide was also evaluated in research involving patients with Diabetes Insipidus. Research explored its use in contexts related to functional limitations of water balance. In these studies, outcomes related to systemic or functional imbalance were monitored, namely: changes in the volume of urine output and urine concentration.

Studies report how symptoms evolved in the observed populations, describing patterns related to the dynamics of urine output in some patients. Follow-up observations were limited, and long-term effects are not fully established for this use. Data for certain groups remain insufficient, contributing to low certainty regarding long-term stability.


What remains uncertain about Chlorpropamide

Studies describe what has been studied so far, but evidence is limited, and evidence quality varies across studies. Results were mixed in some aspects, and certainty remains low regarding some uses. Research provides context but not individual predictions, and findings describe group patterns, not personal outcomes.

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Frequently Asked Questions (FAQ)

Common questions about Хлорпропамид (FAQ)


Q: How many days does Chlorpropamide start working?

Official dosing protocols indicate that adjustments are typically made no more often than every three to seven days. This schedule is designed to allow the body to reach a stable level of the medicine, known as a steady state. This timeframe allows for the drug's effect to be fully realized.


Q: What is the connection between Chlorpropamide and alcohol?

Official product information notes a documented interaction with alcohol (ethanol). Taking the medicine with alcohol may increase the risk of developing low blood sugar (hypoglycemia). It may also result in a disulfiram-like reaction.


Q: What is a disulfiram-like reaction to Chlorpropamide?

The disulfiram-like reaction is an officially documented adverse event that can occur following the consumption of alcohol while taking this medicine. The features of this reaction are described as potentially including flushing of the skin, headaches, and nausea.


Q: How often should I have tests when taking Chlorpropamide?

Official recommendations state that blood sugar (glucose) is monitored periodically during treatment. Additionally, measurements of glycated hemoglobin (HbA1c) should be performed according to established medical standards of care.


Q: What should I do if I miss a dose of Chlorpropamide?

The administration protocol describes that if a dose is missed, the instruction is to take it as soon as the lapse is remembered. However, if the time is almost due for the next scheduled dose, the missed dose must be skipped. The protocol advises against taking two doses simultaneously.


Q: Can I take Chlorpropamide if I have heart problems?

Regulatory warnings note that studies have associated the use of oral hypoglycemic agents, including sulfonylureas, with findings related to cardiovascular mortality. This information is noted in regulatory documents to provide context regarding potential risks when evaluating treatment options.


Q: What should I know about an overdose of Chlorpropamide?

According to official product labeling, an overdose of this medicine, or other drugs in the sulfonylurea class, may lead to hypoglycemia (low blood sugar). This low blood sugar can potentially be severe and prolonged.


Q: How is Chlorpropamide different from Metformin?

Regulatory and scientific classification describes these medicines as belonging to different drug classes. Chlorpropamide is a First-Generation Sulfonylurea that works by stimulating the pancreas to release insulin. Metformin, conversely, belongs to the Biguanide class and primarily functions by reducing the amount of glucose produced by the liver.


Q: Which generation of drugs does Chlorpropamide represent?

Chlorpropamide is officially classified as a First-Generation Sulfonylurea. Sulfonylureas are a class of oral hypoglycemic agents used to help manage high blood sugar levels.


Q: Is it true that Chlorpropamide can cause weight gain?

Official information indicates that weight gain has been observed as a possible effect associated with the sulfonylurea class of medicines. Since Chlorpropamide belongs to this class, this effect is noted as a potential systemic response.


Q: Are there risks to vision associated with Chlorpropamide?

Clinical research has suggested a possible increased risk of damage to the retina, known as retinopathy, associated with the use of this medicine. Separately, vision changes can also occur as a temporary effect of poorly controlled blood sugar levels.


Q: Can Chlorpropamide affect blood pressure?

Based on data from clinical studies, the use of Chlorpropamide may be associated with an increase in blood pressure. Official documents also mention interactions with certain blood pressure medications.


Q: How should the Chlorpropamide package be stored?

The tablets must be stored at controlled room temperature, typically between 20 C and 25 C. Official instructions require the tablets to be kept in their original container, tightly closed, and protected from excess heat and moisture.


Q: Chlorpropamide and driving a car — are there restrictions?

Because the medicine's primary effect carries a risk of low blood sugar (hypoglycemia), which can impair attention and coordination, official information indicates that caution is appropriate for activities that require full mental alertness, such as operating machinery or driving.


Q: Can Chlorpropamide cause drowsiness?

Drowsiness is noted as a possible general side effect associated with this class of medicine. Additionally, tiredness and lethargy are recognized symptoms that may signal the onset of hypoglycemia (low blood sugar), which is the most common adverse reaction.


Q: Are there any vitamins that cannot be taken with Chlorpropamide?

Official labeling documents specific interactions with certain agents, including Nicotinic acid (a B vitamin). Regulatory information notes that Nicotinic acid may tend to produce high blood sugar (hyperglycemia). This interaction could potentially lead to a loss of the necessary blood sugar control when taken simultaneously with Chlorpropamide.


Q: Why can Chlorpropamide cause low sugar (hypoglycemia)?

The medicine functions by acting on the pancreas to stimulate the release of insulin that is already stored in the body. Because this release can occur regardless of the current blood sugar level, it may result in an excessive drop in glucose. This inherent function is why hypoglycemia is the most common adverse reaction.


Q: How is Chlorpropamide related to the thyroid gland?

Official eligibility documents restrict or prohibit the use of this medicine in patients with certain underlying health conditions. This includes individuals who have serious thyroid dysfunction, due to the established safety constraints for this population.


Q: How does Chlorpropamide affect appetite?

Changes in appetite have been reported as possible side effects, often related to gastrointestinal responses to the medicine. These changes can include mild hunger, loss of appetite, and anorexia.


Q: What time of day is considered best for taking Chlorpropamide?

Administration protocols specify that the medication is taken once a day in the morning. It is typically advised to take it with breakfast or the first main meal of the day. This timing is standard because the medicine remains active in the body for an extended period.

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How should Хлорпропамид be stored and disposed of?

Storage and Handling Instructions

Chlorpropamide tablets must be stored at Controlled Room Temperature, which is officially defined as being between 20 C and 25 C (68 F and 77 F). The medication must be protected from excess heat and moisture; therefore, storage in locations like a bathroom is prohibited. To maintain stability, the tablets must be kept in the container they were supplied in, and that container must remain tightly closed.

Child-Safety and Disposal

A mandatory safety requirement is to keep Chlorpropamide tablets out of the sight and reach of children at all times. Unused or expired medication should be disposed of using a local drug take-back program. If this option is not available, the product may be mixed with an undesirable substance (such as dirt or coffee grounds) and placed in a sealed container before being thrown in the household trash. The labeling does not instruct disposal by flushing.

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

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