Buy Indapamide
Indapamide

1.03
A 'water tablet' used primarily to lower blood pressure and reduce swelling due to fluid buildup.


Ingredient
Availability
In Stock
Delivery
Airmail (14-21 days) | EMS trackable (5-9 days)
Product is shipped in a fully discreet envelope with no content disclosure, including all required documentation inside

Product Sheet

Alternative/Local Brand
Natrilix
Active Ingredient(s)
Indapamide
Primary Category
Blood Pressure Support
Therapeutic Class
Diuretics, Sulfonamides
Pharmacological Class
Thiazide-like diuretics
Indications
Hypertension (high blood pressure), Fluid retention (oedema) associated with heart failure
Contraindications
Severe kidney failure, Severe liver disease, Low blood potassium (hypokalaemia), Addison's disease
Minor Side Effects
Dizziness, Headache, Dry mouth, Fatigue
Moderate Side Effects
Nausea, Altered electrolyte levels, Constipation, Muscle cramps
Serious Side Effects
Severe allergic skin reactions, Irregular heartbeat, Signs of pancreatitis, Worsening of lupus
Dosage Forms
Tablet, Prolonged-release tablet
Administration Route
Oral
Mechanism of Action
It causes the kidneys to eliminate more water and salt (sodium and chloride) into the urine. This reduces the volume of fluid circulating in the blood vessels, thereby lowering blood pressure.
Prescription Status
Rx
Manufacturer
Servier Laboratories Ltd
Patient Summary
A 'water tablet' used primarily to lower blood pressure and reduce swelling due to fluid buildup.
Onset Time
1-2 hours
Duration
24 hours
Storage Instructions
Store below 25°C in the original packaging.
Drug Interactions
Lithium, NSAIDs, Other blood pressure medicines, Digoxin
Age Restrictions
Adults only
Pregnancy Use
Not recommended during pregnancy.
Alternative Drugs
Bendroflumethiazide, Chlortalidone, Amlodipine

Indapamide: Generic Medication Overview

This article covers Indapamide, available as a generic medication and marketed under brand names such as Natrilix and Lozol. It is classified in the Heart & Blood Pressure therapeutic area and is supplied as a pill in strengths of 1.5 mg and 2.5 mg. In Hong Kong, indapamide is a prescription-only drug regulated by the Department of Health’s Drug Office.

How Indapamide Works in the Body

Indapamide belongs to the thiazide-like diuretic class. It inhibits the sodium-chloride transporter in the distal convoluted tubule of the kidney, reducing the reabsorption of sodium and water. The resulting natriuresis (increased sodium excretion) lowers extracellular fluid volume, which decreases cardiac preload and, over time, reduces peripheral vascular resistance. These actions collectively lower blood pressure.

Key pharmacologic points:

  • Onset of diuretic effect: 2-4 hours after oral intake.
  • Peak antihypertensive effect: 2-4 weeks, reflecting both diuretic and vasodilatory actions.
  • Duration of action: Up to 24 hours, allowing once-daily dosing.
  • Bioavailability: Approximately 60 % after oral administration; food does not markedly affect absorption.

Conditions Treated by Indindapamide

Indapamide is approved by the Hong Kong Drug Office for:

  • Essential hypertension - as monotherapy or in combination with other antihypertensives.
  • Edema associated with congestive heart failure or other conditions where fluid overload is a concern.

Typical patients are adults with uncomplicated high blood pressure or mild-to-moderate fluid retention. It is not indicated for pediatric use.

Off-Label and Investigational Applications

Current peer-reviewed literature reports occasional off-label use of indapamide for:

  • Resistant hypertension when other agents have failed.
  • Prevention of stroke in patients with high-risk hypertension (evidence limited to observational cohorts).

These uses are not approved by regulatory agencies in Hong Kong. Off-label use requires medical supervision and an individualized risk-benefit assessment.

Who Should Not Use Indapamide?

Absolute Contraindications

  • Known hypersensitivity to indapamide or any sulfonamide-derived drug.
  • Anuria (no urine output) or complete renal failure.
  • Severe hepatic impairment (e.g., decompensated cirrhosis).
  • Acute gout attack (indapamide may raise uric acid).

Relative Contraindications

  • Pregnancy: Category C; potential risk to the fetus, especially in the third trimester.
  • Breast-feeding: Caution, as the drug passes into milk.
  • Severe electrolyte disturbances (e.g., hypokalemia, hyponatremia).
  • Elderly patients: Higher susceptibility to volume depletion and electrolyte imbalance; start at the lowest dose.

Special Populations

  • Renal impairment: Use only if creatinine clearance ≥30 mL/min; dose reduction or avoidance is recommended for lower values.
  • Hepatic impairment: Reduce dose or monitor closely.

Safety Profile: Side Effects and Interactions

Common Side Effects

  • Dizziness or light-headedness (especially after the first dose).
  • Headache.
  • Increased uric acid leading to gout flares.
  • Elevated blood glucose in diabetic patients.
  • Electrolyte changes such as low potassium (hypokalemia) or low sodium (hyponatremia).

These effects are usually mild and improve with continued therapy or dose adjustment.

Serious Adverse Events

  • Severe electrolyte imbalance (e.g., profound hypokalemia) that can cause cardiac arrhythmias.
  • Acute allergic reactions: rash, itching, angio-edema, or anaphylaxis.
  • Pancreatitis (rare).
  • Thrombocytopenia or neutropenia.

If any of these occur, seek immediate medical attention.

Drug Interactions

  • Lithium: Indapamide can raise lithium serum levels → risk of toxicity. Monitor lithium closely.
  • Digitalis (digoxin): Low potassium enhances digoxin toxicity; check electrolytes.
  • NSAIDs: May blunt the diuretic effect and worsen renal function.
  • ACE inhibitors / ARBs / β-blockers: Additive blood-pressure lowering; monitor for symptomatic hypotension.
  • Antidiabetic agents (insulin, sulfonylureas): May reduce glucose control; monitor blood sugar.
  • Corticosteroids, loop diuretics, other thiazides: Increase risk of potassium loss; consider electrolyte supplementation.

Food and Lifestyle Interactions

  • Salt intake: High dietary sodium can reduce the antihypertensive effect.
  • Alcohol: May intensify hypotensive response; limit excessive consumption.
  • Driving or operating machinery: Dizziness is possible, especially after the first dose; avoid hazardous tasks until tolerance is known.

How to Take Indapamide

  • Standard dosing:
  • Start with 1.5 mg pill taken once daily, preferably in the morning to reduce nocturia.
  • If blood pressure control is insufficient after 2-4 weeks, the dose may be increased to 2.5 mg once daily.
  • Special populations:
  • Elderly or renal impairment: Begin with 1.5 mg and reassess renal function before any increase.
  • Hepatic impairment: Use the lowest effective dose and monitor liver function tests.
  • Administration: Swallow the tablet whole with a full glass of water; food does not significantly affect absorption.
  • Missed dose: Take the missed tablet as soon as remembered unless it is near the time of the next scheduled dose; do not double-dose.
  • Overdose: Symptoms may include severe dehydration, electrolyte disturbances, and low blood pressure. Seek emergency care; treatment is supportive-restore fluid balance and correct electrolytes.
  • Discontinuation: Do not stop abruptly if used for heart-failure-related edema; taper under physician guidance to avoid sudden fluid shifts.

Monitoring and Follow-Up

  • Blood pressure: Check weekly for the first month, then at each routine visit.
  • Renal function: Serum creatinine and estimated glomerular filtration rate every 1-2 months, especially during dose changes.
  • Electrolytes: Sodium, potassium, and uric acid levels at baseline and periodically thereafter.
  • Blood glucose: For diabetic patients, monitor fasting glucose or HbA1c more frequently.
  • Signs to report: Persistent dizziness, muscle cramps, muscle weakness, unexplained nausea, or swelling.

Storage and Handling

  • Keep tablets in the original container, tightly closed.
  • Store at room temperature (15-30 °C), away from moisture, heat, and direct sunlight.
  • Keep out of reach of children and pets.
  • Do not use tablets after the expiration date printed on the package.

Medication-Specific Glossary

Thiazide-like diuretic
A class of diuretics that act on the distal convoluted tubule, similar to thiazides but with distinct chemical structures and longer duration of action.
Natriuresis
The process of excreting sodium in the urine, which leads to water loss and reduced blood volume.
Hypokalemia
A condition where blood potassium levels fall below normal, potentially causing muscle weakness and cardiac arrhythmias.
Gout
A form of inflammatory arthritis triggered by elevated uric acid crystals in joints; diuretics can increase uric acid concentrations.

Medical Disclaimer

This article provides educational information about indapamide and is not a substitute for professional medical advice. Treatment decisions, including use for unapproved indications, must be made under the guidance of a qualified healthcare provider. The content is intended for informational purposes and does not constitute medical recommendations. Always consult a physician before starting, stopping, or changing any medication regimen.

Indapamide FAQ

Can I take indapamide if I have a sulfonamide allergy?

Indapamide contains a sulfonamide moiety, so patients with a documented sulfonamide allergy should avoid it. Alternative non-sulfonamide antihypertensives are available.

Does indapamide cause weight loss?

Any weight change is typically due to fluid loss from its diuretic effect, not fat loss. The reduction is usually modest and returns once fluid balance normalizes.

What should I do before a blood test if I’m on indapamide?

Inform the laboratory staff that you are taking indapamide. The test may include electrolytes and kidney function, which can be altered by the medication.

Are there differences between the 1.5 mg and 2.5 mg tablets in appearance?

Yes. In Hong Kong, the 1.5 mg tablet is often a light-blue round pill, while the 2.5 mg tablet may appear white and oval. Always verify the imprint code on the package.

Can I travel internationally with my indapamide prescription?

Yes, but carry the original prescription label, a copy of the doctor’s note, and keep the medication in its original container. Some countries may require a declaration for prescription drugs.

Is indapamide safe for athletes subject to drug testing?

Indapamide is not a prohibited substance in most sports, but athletes should disclose its use to their governing body to avoid any misunderstandings.

How does indapamide compare to hydrochlorothiazide?

Both are thiazide-like diuretics, but indapamide has a longer half-life and a lower risk of causing low potassium. Clinical choice depends on patient tolerance and physician preference.

What are the signs of electrolyte imbalance to watch for?

Symptoms include muscle cramps, irregular heartbeat, fatigue, and excessive thirst. Promptly report these to your healthcare provider.

Can I take indapamide with a low-sodium diet?

A low-sodium diet can enhance the blood-pressure-lowering effect of indapamide and is generally recommended as part of lifestyle management for hypertension.

Does crushing an indapamide tablet affect its efficacy?

Indapamide tablets are formulated for whole-pill ingestion; crushing may alter absorption and increase the risk of side effects. Swallow the tablet whole unless your pharmacist advises otherwise.

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