Индап

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Индап

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Treatment option: Hypertension

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 Индап

What is Indap?

Indap is a pharmaceutical medication classified as a thiazide-like diuretic. It is primarily used in the management of essential hypertension (high blood pressure) in adult patients. The active substance in this medication is indapamide.

Mechanism of Action

Indapamide works by affecting the way the kidneys handle electrolytes. It increases the excretion of sodium and chlorides in the urine, and to a lesser extent, the excretion of potassium and magnesium. This process increases urine output, which helps to reduce the overall volume of fluid circulating in the bloodstream.

In addition to its diuretic effect, indapamide possesses vascular properties. It helps to reduce the resistance in the peripheral blood vessels by decreasing the sensitivity of the blood vessel walls to certain natural stimulants and by modifying the movement of calcium across the cell membranes of the vascular smooth muscle.

Pharmacological Characteristics

Indap is designed to provide a sustained antihypertensive effect. Unlike some other diuretics, at therapeutic doses, its antihypertensive action is significantly more pronounced than its diuretic effect. This means it can effectively lower blood pressure with a minimal impact on the frequency or volume of urination for many patients.

The medication is characterized by its ability to work over a 24-hour period, allowing for consistent blood pressure control. It is absorbed into the gastrointestinal tract after oral administration and undergoes metabolism in the liver before being excreted from the body.

What side effects are possible with Индап?

Possible Side Effects and Safety Information

The officially documented safety profile for Indapamide focuses heavily on its impact on the body’s fluid and electrolyte balance. Adverse reactions are formally classified based on the likelihood of their occurrence, as defined by government regulatory agencies.

Frequency-Classified Adverse Reactions

The most commonly reported adverse event associated with Indapamide is Hypokalaemia (low potassium levels), classified as Common (affecting 1 to 10 users in 100) in regulatory documents. Other common effects include headache, dizziness, and fatigue. Uncommon reactions (affecting 1 to 10 users in 1,000) may involve vomiting and urticaria. Rare effects may include constipation or disturbances of liver function.

System and Serious Adverse Reactions

Adverse effects are documented across several System-Organ Classes, including Metabolism and Nutrition, Nervous System, Gastrointestinal, and Skin and Subcutaneous Tissue Disorders. The product labeling also lists several Serious Adverse Reactions, which, though rare (very rare, affecting less than 1 in 10,000 users), are clinically significant. These include severe skin reactions such as Stevens-Johnson Syndrome (SJS), haematological disorders like Agranulocytosis, and potential central nervous system issues such as Hepatic Encephalopathy in susceptible patients.

Population-Specific Safety Notes

Safety statements include specific considerations for certain patient groups. Indapamide is documented to be used with caution in patients with Hepatic Impairment due to the risk of triggering hepatic encephalopathy. Furthermore, its efficacy may be diminished in cases of Severe Renal Impairment. As a high-level restriction, the medicine is contraindicated in individuals with known sulfonamide hypersensitivity.

These official safety classifications help structure the understanding of the drug’s risk profile, highlighting the necessity for monitoring metabolic changes, particularly at the start of treatment when the risk of Hypokalaemia is most pronounced.

Overdose and Emergency Response

Overdose and when to seek help

Overexposure to the active substance, Indapamide (Индап), primarily presents with an exaggerated physiological effect leading to profound fluid and electrolyte loss. Documented clinical manifestations include severe hypotension (excessively low blood pressure), dehydration, and critical electrolyte disturbances, particularly hypokalaemia (low potassium) and hyponatraemia (low sodium). Patients may also experience gastrointestinal symptoms (nausea, vomiting), neurological effects (dizziness, mental confusion, somnolence), and muscle cramps.


Regulatory Statement on Severe Outcomes

The regulatory profile highlights that severe electrolyte imbalances carry a risk of life-threatening cardiac arrhythmias, including Torsade de Pointes, and may also lead to respiratory depression. The official labeling notes that patients with impaired liver function have an increased risk of developing hepatic encephalopathy if severe electrolyte disturbances occur.

Seek immediate medical attention for any suspected overdose. No specific antidote is known for Indapamide overexposure. Emergency services must be contacted immediately if the individual has collapsed, is experiencing a seizure, has trouble breathing, or cannot be awakened.

Management is strictly symptomatic and supportive, utilizing procedures like gastric lavage or activated charcoal to limit absorption, and focusing on the urgent restoration of fluid and electrolyte balance. Close monitoring of vital signs and ECG monitoring is required during management.

Therapeutic Uses of Индап

The primary use of Indapamide is in the management of conditions presenting with systemic or localized discomfort, acting as a diuretic that may provide supportive relief and helps ease the overall symptom burden. The medicine is indicated across two primary therapeutic domains: the treatment of hypertension (high blood pressure) and the management of salt and fluid retention (edema) associated with congestive heart failure.

This medication is applied in clinical settings that involve acute or unstable symptom patterns, offering symptomatic assistance when patients experience symptoms related to systemic imbalance or heightened physiological activity. Management of discomfort is required in situations involving these symptoms. Controlling high blood pressure supports general well-being during symptomatic phases and assists with maintaining functional stability.

“Treatment should be tailored to the individual patient.”


Quick Fact: Relief for Symptoms related to systemic imbalance

Eligibility and Restrictions for Use

Eligibility Scope for Индап (Indapamide)

Official regulatory documents define strict limitations on who can use Индап, primarily restricting its use to the Adult population (18 years and older).

Category Official Regulatory Status
Contraindicated Populations Absolute prohibition for individuals with known hypersensitivity to indapamide or other sulfonamide derivatives, anuria (no urine production), severe renal failure (creatinine clearance below 30 ml/min), severe hepatic impairment (including hepatic encephalopathy), or pre-existing hypokalaemia (low plasma potassium).
Pediatric Use Not recommended for children and adolescents under 18 years, as safety and efficacy have not been established due to a lack of data.
Pregnancy/Lactation Not recommended during pregnancy and breastfeeding. Use should be avoided, as the drug is excreted in breast milk.
Conditional Use Use in older adults is acceptable when renal function is normal or minimally impaired, but requires caution and monitoring. Caution is also required in patients with gout/hyperuricemia and Systemic Lupus Erythematosus (SLE).

These constraints establish that the medicine must not be used in cases of severe organ impairment or certain electrolyte disturbances, as defined by regulatory bodies.

What should I know about interactions with other medicines?

Interactions with Other Medicines and Products

Official regulatory documents define specific interaction constraints for Indapamide, primarily centered on altering plasma concentrations and pharmacodynamic effects.

Contraindicated and Restricted Combinations

Co-administration with Lithium is contraindicated due to the risk of increased plasma lithium concentration and subsequent toxicity, resulting from Indapamide's effect on renal clearance. The medicine is also strictly restricted for co-use with antiarrhythmics and other substances that may induce Torsades de Pointes, as the diuretic effect can lead to hypokalaemia (low potassium), increasing the risk of arrhythmias.

Pharmacodynamic and Exposure Effects

Concomitant use with other anti-hypertensive agents or alcohol can result in additive blood pressure lowering effects, increasing the risk of hypotension. Co-administration with Non-steroidal Anti-inflammatory Drugs (NSAIDs), including high-dose aspirin, may officially reduce the medicine's antihypertensive efficacy and raise the risk of renal failure. Other substances that increase the risk of hypokalaemia, such as corticosteroids or stimulant laxatives, require caution due to pharmacodynamic reinforcement of electrolyte imbalance. For procedures, blood pressure-lowering medications are advised to be withheld for 24 hours prior to high-dose Amifostine administration.

Mechanism of Action

Modulating Kidney Function for Fluid Balance

This mechanism targets the sodium-chloride cotransporter ( Na^+/ Cl^- Symporter) in the kidney's distal convoluted tubule, directly blocking the reabsorption of salt and water. This molecular action initiates a cascade that leads to increased urinary output and electrolyte excretion, reducing the circulating plasma volume and thus decreasing cardiac output.


Direct Action on Arterial Resistance

Independent of its effect on fluid volume, the drug concentrates within the vascular smooth muscle and modulates internal calcium ion ( Ca^2+) dynamics. By limiting the concentration of Ca^2+ available for contraction, this mechanism causes the walls of small arteries to relax and widen. The resulting vasodilation contributes to a reduction in the Total Peripheral Resistance to blood flow.


Integrated Dual Mechanism

The simultaneous engagement of both the renal and vascular pathways provides a combined physiological effect. While the renal effect contributes to a volume adjustment, the vascular modulation is the dominant factor in the mechanism's contribution to the reduction of peripheral resistance, particularly for the persistent effect. This integration of volume and resistance modulation shapes the overall physiological response of the circulation.

Dosage and Administration Information

How to Use Индап

Indapamide is provided as a tablet and is administered orally (swallowed) once daily, typically taken in the morning. The medicine may be taken with or without food. Prolonged-release or slow-release formulations, where available, must be swallowed whole and must not be crushed or chewed, as this alters the intended drug release profile.


Official Dosing Regimens

Standard guidelines establish distinct starting doses depending on the condition being addressed:

  • For Hypertension: Treatment generally initiates with 1.25 mg taken once daily. If a dose adjustment is necessary, it is conducted after a period of assessment, often four weeks.
  • For Edema: The usual starting dose is 2.5 mg taken once daily. The dose may be increased, if needed, after a minimum of one week of use.

In both regimens, the daily dose is not to exceed 5 mg, as doses higher than this maximum have not shown further clinical benefit for blood pressure reduction but are associated with an increased diuretic effect.


Administration Rules for Specific Populations

Population Group Official Instruction or Rule
Older Adults Dosing should be approached cautiously, often starting at the low end of the therapeutic range due to potentially reduced organ function.
Pediatric Patients Safety and effectiveness have not been established for use in this population.

If a dose is missed, the patient should take it as soon as it is remembered. However, if it is close to the time of the next scheduled dose, the missed dose should be skipped entirely, and the regular dosing schedule should be resumed. A double dose must not be taken to compensate for a missed one.

Recent Clinical Evidence

Research Evidence / Overview of Studies for Индап (Indapamide)

This overview describes the research landscape for Indapamide, summarizing the types of studies conducted and what the available findings indicate, without offering any medical advice or interpretation of treatment decisions. Research findings describe group patterns and do not determine whether an individual will respond similarly.


Evidence for use in Managing High Blood Pressure (Hypertension)

Research exploring how blood pressure is managed has primarily relied on Randomized Controlled Trials (RCTs) and comprehensive meta-analyses. These studies were used in research exploring how blood pressure changes over time, particularly the Systolic and Diastolic measurements. Research was conducted with a wide range of adults who have elevated blood pressure, including those with Isolated Systolic Hypertension and older adults (including those aged ge 80 years).

Studies observed how blood pressure evolved in the observed populations, and documented changes in both SBP and DBP from baseline values. Similar observed patterns were described across various trials. Furthermore, some studies used longer observation periods to monitor outcomes related to physiological strain, such as the thickness of the heart muscle. Research describes that heart structure parameters, such as LVMI, were included in the measurements during the study period.


Evidence for Reducing Risk of Major Cardiovascular Events

Indapamide was studied for its use in research contexts related to long-term cardiovascular outcomes in high-risk patients. The available evidence in this area includes several long-term Randomized Controlled Trials (RCTs) that specifically monitored clinical event outcomes over periods of two to five years. These research scenarios included patients with elevated cardiovascular risk, such as those who had experienced a prior stroke or Transient Ischemic Attack (TIA), and patients who have Type 2 Diabetes.

Studies monitored the rates of major outcomes, including Fatal and Non-fatal Stroke, Myocardial Infarction (heart attack), and Cardiovascular Death. Findings documented observed patterns in these studies where variations were noted in the frequency of these major outcomes between the Indapamide-based regimen groups and the control groups.


Research Gaps and What Remains Uncertain about Индап

Several limitations are noted in the published scientific and regulatory literature:

  • Combination Therapy Dominance: The primary findings regarding event outcomes (stroke, heart attack) stem from studies where Indapamide was used in combination with another medicine. Data for long-term outcomes when Indapamide is used as a single agent are not well established.
  • Limited Comparative Evidence: Direct, long-term comparison against all other widely used diuretics in specific outcome studies is limited.
  • Incomplete Long-term Data: Although follow-up durations were long, there is limited information for long-term outcomes beyond five years.

Key Studies & References

  1. Effects of a fixed combination of perindopril and indapamide on macrovascular and microvascular outcomes in patients with type 2 diabetes mellitus: results of the ADVANCE trial

Frequently Asked Questions (FAQ)

Common questions about Индап (FAQ)


Q: Why is Индап sometimes prescribed instead of other diuretics?

A: Official descriptions note that this medicine is chemically classified as a non-thiazide sulfonamide derivative, which distinguishes it from other diuretics. Furthermore, regulatory documents describe a dual mechanism of action that includes a direct effect on the blood vessel walls, in addition to its diuretic effect. These characteristics are described in official documents, supporting its classification and role in the management of elevated blood pressure.


Q: How long does it usually take to notice the effect of Индап?

A: Official drug information indicates that the concentration of the medicine typically reaches its highest level in the blood within approximately two hours after taking a dose. However, the full blood pressure lowering effect (antihypertensive effect) is generally observed after a period of about two weeks of starting treatment.


Q: Can Индап be split or crushed?

A: Whether the tablets can be altered depends on the specific formulation. Immediate-release tablets may be described in some patient labeling as being able to be cut or crushed. However, any prolonged-release or slow-release forms are required to be swallowed whole, as altering the tablet may change the intended release of the medicine.


Q: Is feeling dizzy a normal potential side effect of Индап?

A: Yes, dizziness is listed in official regulatory documents as a common potential adverse effect. This feeling is often related to the intended blood pressure-lowering action of the drug. This is noted as a possibility, particularly when rising quickly.


Q: Can Индап cause low potassium?

A: Official safety documents classify Hypokalaemia (low potassium levels in the blood) as a common side effect. This occurs because the medicine works by increasing the amount of electrolytes, including potassium, that the kidneys excrete. Monitoring of potassium levels is a key part of the official guidance for the start of treatment.


Q: Does İндап affect blood sugar levels?

A: Regulatory documents mention that this medicine may cause changes in blood sugar levels, and hyperglycemia (high blood sugar) is listed as a potential effect. For patients with diabetes, monitoring of blood glucose levels is emphasized in official guidance during the use of this medicine.


Q: Do older adults use Индап differently than younger adults?

A: The official guidance states that dosing for older adults should be approached cautiously and may start at the low end of the therapeutic range. This is often due to the potential for age-related reductions in kidney or liver function, which may affect how the body processes the medicine.


Q: What food or drinks might interact with Индап?

A: Official documents note that alcohol can interact with this medicine, leading to an additive blood pressure lowering effect. While specific food interactions are not routinely listed, official treatment advice often recommends following a low-sodium or low-salt diet and may include guidance on potassium-rich foods, based on an individual's specific metabolic monitoring.


Q: What kind of studies have been done on the long-term use of Индап?

A: The research base for this medicine includes long-term Randomized Controlled Trials (RCTs) that have followed patients for up to five years. These studies documented changes related to blood pressure and specific cardiovascular events, such as heart attack and stroke.


Q: Are there reports of fatigue or tiredness with Индап?

A: Yes, official regulatory labeling documents list fatigue and weakness as common side effects of the medicine. This is listed as a common pattern of adverse effects in regulatory documentation.


Q: Is Индап used in children or teenagers?

A: Official documents state that the safety and effectiveness of the medicine have not been established in pediatric patients, including children and adolescents under 18 years of age. For this reason, its use is generally not recommended in this population due to the lack of sufficient data.


Q: Is it common to have headaches when starting Индап?

A: Headache is classified as a common side effect in regulatory documents. Since monitoring for adverse effects, including changes in metabolism, is highly emphasized by regulators during the initial stages of treatment, it is important to be aware of all common effects.


Q: Can I take pain relievers (like ibuprofen or aspirin) while on Индап?

A: Co-administration with Non-steroidal Anti-inflammatory Drugs (NSAIDs), including high-dose aspirin, is officially restricted due to the risk of reducing the medicine's blood pressure-lowering efficacy. Furthermore, this combination may raise the risk of renal failure, according to regulatory documents. The official drug label lists these restricted interactions.


Q: Are there any common supplements that should be avoided with Индап?

A: Supplements containing calcium are listed in official documents as potential interactions. Additionally, due to the risk of low potassium (hypokalaemia), official guidance focuses on monitoring potassium levels, and in some cases, potassium supplements may be used to address documented low potassium levels.


Q: Is it safe to use Индап if I have gout?

A: Regulatory documents note that the medicine may cause an increase in uric acid levels (hyperuricemia). Therefore, it is advised to use it with caution in patients who have a history of gout. Monitoring of uric acid levels is often part of the official guidance during treatment.


Q: Does Индап interact with lithium?

A: The co-administration of this medicine with Lithium is contraindicated (strictly prohibited). This restriction is due to the medicine's effect on renal clearance, which can lead to an increase in lithium concentration and raise the risk of toxicity.


Q: What is the difference between diuretics and thiazide-like diuretics like Индап?

A: This medicine is chemically classified as a non-thiazide sulfonamide derivative, which is a key structural difference from traditional thiazide diuretics. Moreover, it has a documented dual mechanism of action that includes a direct effect on the blood vessel walls, setting it apart from some other diuretics.


Q: Can taking Индап lead to dehydration?

A: The medicine’s function is to increase urinary output. Warning signs of electrolyte imbalance, which can be associated with volume depletion or dehydration, include symptoms like dry mouth, thirst, and unusual weakness.


Q: Why do doctors often prescribe Индап with other blood pressure medicines?

A: Official regulatory information notes that the medicine is often studied and used in combination with other anti-hypertensive drugs. This is because its effects on blood pressure are described as additive when it is co-administered with other blood pressure-lowering agents.


Q: What is the typical expectation for follow-up when starting Индап?

A: Official product labeling emphasizes the necessity for monitoring metabolic changes, particularly at the start of treatment. Specific blood tests to check serum electrolytes, glucose, and renal function are commonly part of the recommended monitoring protocol.


Q: Is Индап known to cause muscle cramps?

A: Muscle cramps or spasms are listed in official documents as a common potential adverse effect. Muscle cramps are listed as a common potential adverse effect and are noted as a possible sign of a low potassium level (hypokalaemia).


Q: Does Индап affect sleep?

A: Reports indicate that side effects related to the central nervous system have been observed. These may include potential feelings of drowsiness or difficulties like trouble sleeping (insomnia).


Q: Is it safe to drive while taking Индап?

A: Because the medicine may cause effects such as dizziness or fatigue, official guidance advises caution regarding driving or operating heavy machinery until the individual knows how they are affected.


Q: Are there any restrictions on sun exposure while using Индап?

A: Official documents note that the medicine may cause an increased sensitivity of the skin to sunlight (photosensitivity). Official guidance recommends caution and minimizing sun exposure due to the risk of increased sensitivity.


Q: Does my diet need to change while taking Индап?

A: Treatment for high blood pressure often involves a recommendation for dietary changes, such as adhering to a low-sodium or low-salt diet. Official guidance related to this medicine may also include specific information about foods rich in potassium, depending on an individual’s specific monitoring results.


Q: Why do some people experience changes in urination when taking İндап?

A: The mechanism of this medicine involves causing the kidneys to excrete more salt and water, which is its diuretic effect. Due to this action, regulatory documents note that frequent urination is a common side effect that may occur, especially during the initial weeks of treatment.


Q: What are the conditions where Индап is described as ineffective?

A: Official product labeling indicates that the medicine's efficacy may be diminished in cases of Severe Renal Impairment (severe kidney problems). Furthermore, its use is strictly prohibited in individuals with anuria (the inability to produce urine).

How should Индап be stored and disposed of?

The storage and disposal of Indapamide (Индап) tablets must adhere strictly to the conditions specified in the official regulatory labeling.

Storage Conditions

Indapamide must be stored at Controlled Room Temperature, which requires keeping the product below 30 C (86 F) and avoiding excessive heat. The tablets must be protected from light and moisture and stored in the original container, which is typically required to be tight and light-resistant. There is an explicit regulatory instruction not to freeze the medication.

Safety and Disposal

The product must be kept out of the sight and reach of children, and when dispensed, a child-resistant closure is required. Any unused, expired, or leftover Indapamide should not be discarded in household trash or wastewater. Disposal must be handled according to local regulatory requirements for pharmaceutical waste, often by returning the product to a designated collection point or pharmacy.

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

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