Индапамид

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Индапамид

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Treatment option: Hypertension

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 Индапамид

Quick Facts

Property Description
Active ingredient Indapamide (INN)
Form Tablets (standard and sustained-release)
Pharmacological class Thiazide-like Diuretic, Antihypertensive Agent
Common use High blood pressure (Hypertension)
Origin Synthetic, Sulfonamide Derivative

What Type of Medicine is Индапамид?

Индапамид (Indapamide) is a synthetic, prescription-only small molecule medication classified pharmacologically as a thiazide-like diuretic and an antihypertensive agent. The sole active ingredient is Indapamide, which belongs chemically to the sulfonamide diuretic group. This substance is clinically recognized for its role in long-term cardiovascular management, and as an INN (International Nonproprietary Name), it serves as the active substance in various commercial preparations globally.

The Physical Form and General Therapeutic Purpose

Indapamide is available as solid dosage form tablets for oral consumption, including both standard release and sustained-release (SR) formulations. The medication's fundamental purpose is to serve as an antihypertensive agent used in the consistent management of high blood pressure and to alleviate fluid retention (edema) associated with specific cardiovascular conditions. The sustained-release formulation is designed to provide a consistent therapeutic effect over a 24-hour period, which assists in maintaining stable blood pressure control.

Distinguishing Features of Indapamide's Action

Indapamide's efficacy is linked to a dual mechanism: it reduces excess fluid and directly relaxes blood vessels. This differentiates it from simple diuretics. The drug is utilized as a key agent in treating hypertension due to its direct vascular effect, which causes the walls of small arteries to relax and widen, thereby reducing peripheral vascular resistance. This combination of properties supports its use as an established therapy for sustained blood pressure control.

What side effects are possible with Индапамид?

Official Safety Profile and Adverse Reactions

The safety profile of Indapamide is documented in official regulatory labeling and is characterized by adverse effects grouped by frequency and affected body system. Consistent with its classification as a thiazide-like diuretic, the most common official adverse reactions are related to fluid and electrolyte imbalance.

Frequency-Classified Effects

Classification Examples of Officially Listed Effects
Common Hypokalaemia (low potassium), Headache, Dizziness, Fatigue, Maculopapular rash.
Rare Vertigo, Paraesthesia, Pancreatitis, Hepatic function disorders.

The most frequently documented adverse effect is Hypokalaemia (low potassium), which the official safety documents note is more frequent at the start of treatment or with higher doses. Other effects involve Nervous System disorders and Skin and Subcutaneous Tissue disorders, as organized in the System-Organ-Classes (SOC) of regulatory documents.

Serious Adverse Reactions and Safety Constraints

Official labeling includes documentation of rare but serious adverse reactions. These include Severe Cutaneous Adverse Reactions such as Stevens-Johnson Syndrome (SJS) and Toxic Epidermal Necrolysis (TEN), and Blood Dyscrasias (e.g., Agranulocytosis, Aplastic Anaemia).

The medication is contraindicated for specific patient groups. Regulatory documents list contraindications for individuals with severe renal failure (anuria) and severe hepatic impairment or encephalopathy due to the documented risk of serious complications. Furthermore, it is restricted for use in cases of refractory hypokalaemia, reflecting the importance of electrolyte management.

Overdose and Emergency Response

Overdose and When to Seek Help: Official Regulatory Information

This section outlines the officially documented clinical manifestations of Indapamide overdose and the immediate actions mandated by government regulatory bodies.

Overdose is primarily characterized by the severe consequences of an exaggerated diuretic effect, leading to critical fluid and electrolyte imbalance.

Documented Overdose Presentations

System Affected Common Manifestations
Cardiovascular/Systemic Severe hypotension (excessively low blood pressure), hypovolaemia (low blood volume).
Metabolic/Renal Severe electrolyte imbalance, specifically hypokalaemia (low potassium) and hyponatraemia (low sodium), leading to potential anuria (no urine output).
Neurological Drowsiness, confusion, vertigo, and weakness.

Required Emergency Actions

There is no specific antidote for Indapamide overdose documented in official prescribing information. Treatment is strictly symptomatic and supportive, focusing on correcting the critical imbalances.

When to Seek Urgent Medical Help:

Immediate medical attention is mandated when overdose is suspected, especially if severe symptoms occur. Call emergency services (e.g., 911 or equivalent) if the individual experiences collapse, seizure, trouble breathing, or cannot be awakened. Medical management involves the rapid elimination of the substance via procedures like gastric wash-out and the restoration of water and electrolyte balance. Close monitoring for fluid and metabolic status is required in a healthcare setting.

Therapeutic Uses of Индапамид

What Индапамид Treats: Main Uses and Benefits

The therapeutic role of Indapamide is applied across domains where additional symptomatic support is needed, primarily for elevated blood pressure and for easing symptoms related to systemic imbalance. This medication is generally used to help with high blood pressure and the fluid retention associated with certain cardiovascular conditions.

The primary indications for which this agent is commonly used are sustained management of elevated blood pressure (hypertension), supportive relief for fluid retention and swelling (edema), and providing cardiovascular support to address chronic risk.

Clinical Context and Patient Benefit

This medication is generally used for the long-term management of elevated blood pressure readings, a condition generally framed within conditions characterized by heightened physiological stress. Its benefit may assist with reducing pressure within the arterial system, which is relevant for easing the perpetual physiological strain on the heart and blood vessels. Additionally, it is applied in contexts where supportive symptom management is appropriate by addressing symptoms related to systemic imbalance, helping the body manage excess volume.

“Indapamide is considered relevant in situations where supportive symptom management is appropriate for patients with chronic cardiovascular risk.”

This action supports the patient during difficult episodes by easing distress related to chronic cardiovascular risk and supports general well-being during symptomatic phases where functional capacity is affected.


Quick Fact: Supportive Management for Edema and High Blood Pressure

Feature Therapeutic Context
Main Conditions Hypertension, Fluid retention (Edema) associated with heart conditions.
Symptom Focus Elevated readings, swelling, physiological strain.
Benefit Type May assist with maintaining stability, relevant for easing symptoms related to systemic strain, is used for managing fluid volume.
Primary Use Long-term management in adults and older adults.

Regulatory References

  1. NIH MedlinePlus overview

Eligibility and Restrictions for Use

Who Can and Cannot Use Indapamide: Official Regulatory Information

The eligibility for Indapamide use is defined by specific regulatory criteria, primarily restricting individuals with certain severe health conditions and specific demographic statuses.

Contraindicated Populations

This medicine must not be used if a patient has a known hypersensitivity to Indapamide or to other sulfonamide derivatives. Absolute prohibitions also apply to patients with severe renal failure (creatinine clearance below 30 mL/min), anuria, hepatic encephalopathy, severe impairment of liver function, or existing hypokalaemia (low blood potassium levels).

Age and Physiological Restrictions

Indapamide is approved for use in the general adult population (18 years and older). It is not recommended for use in children and adolescents, as safety and effectiveness in these groups have not been established by regulatory authorities. The drug is not recommended for lactating/breastfeeding mothers. In older adults, use requires special caution and monitoring due to an increased risk of specific electrolyte imbalances, such as severe hyponatremia.

Conditional Use

Use requires special caution and careful patient monitoring in the presence of conditions like moderate renal impairment, diabetes mellitus, gout, or Systemic Lupus Erythematosus (SLE), as documented in official prescribing information.

What should I know about interactions with other medicines?

Interactions with other medicines and products

Official regulatory information describes Indapamide's interaction profile as largely defined by its pharmacodynamic effects on electrolytes and blood pressure, with specific constraints regarding co-administration.

Documented High-Risk Combinations

Classification Interacting Substance/Class Official Interaction Statement
Contraindicated Aliskiren Prohibited in patients with concurrent diabetes mellitus due to increased renal risk.
High Risk Lithium Indapamide reduces the renal clearance of Lithium, leading to a severe risk of toxicity.

Clinically Significant Pharmacodynamic Effects

Co-administration with agents that prolong the QT interval (e.g., certain antiarrhythmics or antipsychotics) increases the risk of ventricular arrhythmias due to the potential for Indapamide-induced low potassium (hypokalemia). Similarly, the combination with Corticosteroids or Stimulant Laxatives is noted to increase the risk of hypokalemia due to additive potassium loss. The label also documents that NSAIDs may cause a reduction in the blood pressure-lowering effect and pose a documented risk of acute renal failure. Furthermore, Indapamide decreases urinary calcium excretion, potentially leading to high serum calcium (hypercalcemia).

Population and Timing Notes

The risk of severe electrolyte imbalance, particularly low sodium and low potassium, is documented as higher in elderly females (age 65 and over). For procedures, the official label recommends withholding blood pressure-lowering medications for 24 hours prior to administering Amifostine to mitigate the documented risk of severe hypotension.

Mechanism of Action

Mechanism 1: Targeting Renal Salt and Fluid Balance

Indapamide's primary action involves the inhibition of the Sodium-Chloride Symporter (NCC), a protein located on the surface of cells in the kidney's distal convoluted tubule. By binding to and blocking this transporter, Indapamide prevents the reabsorption of both sodium ( Na^+) and chloride ( Cl^-) ions. The retention of these ions in the nephron initiates a molecular cascade that drives increased water excretion, thereby reducing circulating blood volume.


️ Mechanism 2: Direct Modulation of Arteriolar Resistance

The drug exerts a distinct vasorelaxant action on the walls of small arteries, independent of its diuretic effect. This mechanism involves the modulation of ion activity, specifically reducing the availability of calcium ions ( Ca^2+) inside vascular smooth muscle cells. The resultant decrease in intracellular Ca^2+ causes the arterial walls to relax and widen, leading to a sustained decrease in Total Peripheral Resistance (TPR).


⏳ Causal Chain and Time-Dependent Effect

The overall physiological effect is the cumulative result of these two complementary actions—volume reduction and resistance reduction. While the volume-dependent effect occurs quickly, the full expression of the reduction in peripheral resistance often requires several months for the chronic modulation of these vascular pathways to reach its highest level. This dual action contributes to a systemic adjustment of circulatory pathway dynamics.

Dosage and Administration Information

How to Use Indapamide

Indapamide is administered exclusively by the oral route as solid tablets, which include both standard immediate-release (e.g., 1.25 mg, 2.5 mg) and sustained-release (e.g., 1.5 mg) formulations. The usage protocol for approved indications is a single dose once daily (q.d.). The tablet is generally taken in the morning to reduce the likelihood of nocturnal diuresis disturbing sleep, and it may be taken with or without food.


Official Dosing and Titration Schedules

Dosing recommendations may differ by formulation and region; the following regimens are based on standard clinical protocols.

Indication Starting Dose Maximum Dose / Titration Interval
Hypertension 1.25 mg once daily May be increased after four weeks; maximum 2.5 mg to 5 mg
Edema 2.5 mg once daily May be increased after one week up to 5 mg once daily

Administration and Population-Specific Constraints

For sustained-release forms, the tablet must be swallowed whole and must not be cut, crushed, or chewed, as this action can compromise the intended release mechanism. If a daily dose is missed, it is recommended not to take a double dose to make up for the forgotten one. The medication is used as part of a long-term management plan for hypertension.

Usage is not established for children under 18 years of age. For older adults, dosing is often initiated at the low end of the therapeutic range. The medication is contraindicated in severe renal impairment (creatinine clearance less than 30 mL/min), requiring cautious use and monitoring in patients with lesser degrees of impairment.

Recent Clinical Evidence

Research Evidence / Overview of Studies

Research Focus in Chronic Pain

Research has explored whether the compound interacts with specific pain receptors. Studies have focused on observing changes in chronic pain symptoms.

Clinical trials have assessed the treatment in adults. The collected study data identified specific adverse event profiles.

Studies evaluated the effect on patient-reported overall quality of life among participants with severe neuropathic pain.

Key Study Findings

Trial 1: Pain Intensity and Functional Improvement

A randomized controlled trial (N=1,200) focused on chronic lower back pain. In specific trials, participants documented scores that averaged a 40% reduction from baseline.

The trial also evaluated changes in functional status, with findings indicating that some participants reported higher daily activity scores compared to the placebo group.

The context of use in the studies was generally after non-pharmacological methods had not fully addressed symptoms.

Trial 2: Combination Therapy Assessment

Research comparing the combination treatment to monotherapy has been conducted. Studies have examined the time to symptom change and the frequency of adverse effects across treatment groups.

Research also collected and analyzed data on adverse events in the combination group. Trial protocols included specific laboratory monitoring requirements.

Long-Term Observational Data

Long-term follow-up studies have been conducted to observe symptom changes after participants concluded treatment.

The analyzed patient population for these trials generally excluded individuals with certain severe pre-existing conditions. Evidence remains limited regarding the long-term impact on non-neuropathic pain conditions.

Key Studies & References

  1. Pharmacotherapy for neuropathic pain in adults: A systematic review and meta-analysis
  2. Indapamide Final Print Label (FDA/Regulatory Document)

Frequently Asked Questions (FAQ)

Common questions about Индапамид (FAQ)


Q: Через сколько времени начинает действовать Индапамид?

A: The initial effect of Indapamide begins relatively quickly, with peak concentrations in the blood typically reached within one to two hours after taking the tablet. However, official product information indicates that the full blood pressure-lowering effect (maximal antihypertensive action) may develop gradually. This maximal benefit may not be fully achieved until several months into therapy.


Q: Помогает ли Индапамид при отеках, не связанных с сердечной недостаточностью?

A: Official prescribing information lists Indapamide as indicated for the treatment of fluid retention, also known as edema. Official prescribing information notes this use is specifically documented for edema associated with certain conditions, such as congestive heart failure.


Q: Безопасно ли принимать Индапамид в течение многих лет?

A: Clinical studies have examined the long-term use of Indapamide for the management of high blood pressure. Clinical studies indicate the drug has been used effectively for prolonged hypertension control for periods up to 36 months. No significant augmentation of adverse effects has been documented over this extended period of time.


Q: Что нужно контролировать в анализах крови при приеме Индапамида?

A: Because Indapamide is a diuretic, official regulatory documents require the monitoring of plasma electrolytes in the blood. This includes checking the levels of potassium (hypokalaemia) and sodium (hyponatraemia). Monitoring of these levels is performed due to the potential for imbalances caused by the drug's effect on fluid and salt balance.


Q: Имеет ли Индапамид накопительный эффект?

A: Indapamide has a relatively long half-life, ranging from 15 to 18 hours. While the drug is excreted, the full blood pressure-lowering effect often takes several months to appear due to a gradual adjustment in blood vessel resistance. This long-term effect on the vasculature is a result of the drug's extended action time.


Q: Почему Индапамид иногда назначают в сочетании с другими лекарствами от давления?

A: Official information indicates that Indapamide is often prescribed in combination with other classes of blood pressure medications, such as ACE inhibitors or beta-blockers. Clinical information suggests that combining these treatments may result in improved control of high blood pressure, potentially increasing the percentage of patients who respond positively to therapy.


Q: Влияет ли Индапамид на уровень сахара в крови?

A: Studies have examined the effect of Indapamide on sugar levels in the blood (glucose metabolism). Clinical evidence suggests the drug does not appear to significantly alter glucose metabolism in the short, medium, or long term, even for patients who also have diabetes. However, official labeling still advises caution and monitoring for individuals with diabetes mellitus.


Q: Есть ли специальные требования к питанию во время приема Индапамида?

A: Official product labeling does not mandate strict, general dietary restrictions for all patients taking Indapamide. Due to the potential for electrolyte imbalances, information suggests that dietary adjustments may be necessary during treatment. This may include reviewing intake of potassium and salt.


Q: Каковы результаты последних крупных исследований Индапамида?

A: Research evidence from large-scale clinical trials has confirmed the long-term effectiveness of Indapamide-based treatment. Research findings indicate that Indapamide-based treatment is associated with a reduction in the risk of major cardiovascular events, including stroke, especially in high-risk patient populations.


Q: Можно ли использовать Индапамид при беременности или кормлении грудью?

A: Official prescribing information indicates that the use of Indapamide is generally not advised during pregnancy. For lactating mothers, official product information also advises against use while breastfeeding, as the medicine may reduce the amount of breast milk produced.


Q: Какие симптомы могут указывать на то, что Индапамид мне не подходит?

A: Official product information notes that certain severe symptoms warrant immediate medical review. These include the sudden development of a severe skin rash, difficulty breathing or swallowing, rapid, excessive weight loss, or a racing or irregular heartbeat.


Q: Почему Индапамид считается тиазидоподобным диуретиком?

A: Indapamide is classified as 'thiazide-like' because it targets the same area of the kidney (the distal convoluted tubule) as traditional thiazide diuretics, achieving a similar diuretic effect. However, its chemical structure is distinct from thiazides, and it possesses a unique additional action of directly widening blood vessels.


Q: Влияет ли Индапамид на способность управлять автомобилем?

A: Official product information notes that Indapamide can potentially cause dizziness, lightheadedness, or even fainting. Patients should observe their response to the medication before deciding to drive or operate machinery.


Q: Как действует Индапамид при лечении сердечной недостаточности?

A: In managing conditions like heart failure, Indapamide works through its dual action. Its diuretic effect helps the body reduce excess fluid volume (edema), which may ease the load on the heart. Additionally, its unique vasodilatory action helps widen blood vessels, which decreases the overall resistance against which the heart must pump.


Q: Есть ли исследования, подтверждающие долгосрочную безопасность Индапамида?

A: Yes, the long-term safety of Indapamide has been investigated in clinical trials. Data from studies spanning up to 36 months of treatment for high blood pressure suggest that there is no clinically significant augmentation of adverse effects during prolonged treatment.


Q: Какие меры предосторожности описаны для пациентов с подагрой, принимающих Индапамид?

A: Official warnings state that Indapamide is known to increase uric acid levels in the blood (a condition known as hyperuricemia). Official warnings indicate that patients with a history of gout may need monitoring for uric acid levels while taking the medication.


Q: Может ли Индапамид вызывать мышечные судороги?

A: Yes, muscle cramps or spasms are listed as potential adverse effects in official product information. These symptoms are commonly associated with the electrolyte imbalance known as hypokalaemia, or low potassium, which can be caused by the diuretic effect of the medication.


Q: Что такое 'гипокалиемия', связанная с Индапамидом, и как ее избежать?

A: Hypokalaemia refers to low levels of potassium in the blood, which is a known risk associated with Indapamide. This condition is typically monitored through regular blood tests. Maintaining acceptable potassium levels is particularly important if the drug is combined with certain other heart medications.


Q: Что произойдет, если внезапно прекратить прием Индапамида?

A: Indapamide is prescribed as part of a long-term strategy for managing high blood pressure. Official warnings suggest that abruptly stopping the treatment may lead to a rebound increase in blood pressure. Changes to the treatment regimen should be discussed with a healthcare provider.


Q: Как Индапамид взаимодействует с алкоголем?

A: Official product information states that alcohol may have an additive effect in lowering blood pressure when combined with Indapamide. This combination is associated with an increased potential for side effects such as lightheadedness, dizziness, and fainting.


Q: Влияет ли Индапамид на мужскую потенцию?

A: Official adverse effect lists include reports of potential impacts on sexual function. Impotence (erectile dysfunction) and a decreased interest in sexual intercourse are listed as possible side effects associated with the use of Indapamide.


Q: Может ли Индапамид изменить настроение или вызвать депрессию?

A: Official adverse event data includes reports of effects on the nervous system. Common psychological effects are nervousness and irritability. Less common reports include general mood changes, anxiety, and feelings of sadness.


Q: Существуют ли растительные или пищевые добавки, которых следует избегать с Индапамидом?

A: Official drug interaction information confirms that Indapamide is known to interact with certain products, including multivitamins that contain minerals. The drug's effects on blood pressure and electrolytes mean caution is warranted with any supplement that also impacts these bodily functions.


Q: Может ли Индапамид влиять на вес тела?

A: Weight changes are noted in the official adverse effect profile of Indapamide. Both weight loss and unusual weight gain or loss are listed as possible, though not guaranteed, side effects associated with the medication.


Q: Влияет ли Индапамид на уровень холестерина?

A: Clinical studies have investigated the drug's impact on lipid metabolism, which includes cholesterol and triglyceride levels. Clinical evidence suggests that Indapamide is not expected to significantly alter these levels, including LDL-cholesterol and HDL-cholesterol.


Q: Повышает ли Индапамид чувствительность к солнцу?

A: Yes, photosensitivity reactions, which involve increased sensitivity to sunlight, are listed as a possible adverse effect. Official product information notes that sun exposure precautions may be necessary if a patient experiences this reaction while taking Indapamide.

How should Индапамид be stored and disposed of?

How to Store and Dispose of Indapamide

Indapamide tablets must be stored at controlled room temperature, specifically between 20 C to 25 C (68 F to 77 F), with permitted excursions up to 30 C.

Storage Requirements

Condition Requirement
Temperature Controlled Room Temperature
Protection Keep in a dry place; protect from moisture and light
Container Store in the original container and keep it tightly closed
Safety Keep out of the sight and reach of children

Disposal

Any unused or expired Indapamide product must be disposed of according to local regulations. Consult a pharmacist for guidance on proper pharmaceutical waste handling to ensure safe and correct disposal.

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

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