Indapamide Orion (Indapamide)

Indapamide acts on the renal tubular system to manage fluid balance and blood pressure, making it useful in several cardiovascular and renal conditions.

• Hypertension: lowers systolic and diastolic blood pressure, helping to prevent cardiovascular complications.
• Edema associated with congestive heart failure: promotes diuresis to decrease fluid overload and improve symptoms.
• Edema secondary to renal disease: enhances urinary excretion to reduce swelling caused by impaired kidney function.

• Indapamide inhibits the Na⁺/Cl⁻ cotransporter in the distal convoluted tubule, reducing sodium and chloride reabsorption. This leads to increased excretion of water and electrolytes, producing a diuretic effect. The resulting decrease in plasma volume lowers peripheral vascular resistance, contributing to its antihypertensive action. Additionally, indapamide may cause modest vasodilation independent of its diuretic activity.

Indapamide may cause a range of adverse reactions, varying from mild to severe.

Common Side Effects

• Increased urination: more frequent need to void.
• Dizziness or light‑headedness: especially when standing quickly.
• Headache: mild to moderate intensity.
• Electrolyte disturbances (e.g., low potassium): due to enhanced urinary loss.
• Nausea or abdominal discomfort.

Serious or Rare Side Effects

• Severe dehydration: marked fluid loss requiring medical attention.
• Significant electrolyte imbalance (e.g., hyponatremia, hypokalemia): can cause cardiac arrhythmias.
• Allergic reactions: rash, itching, or swelling.
• Blood dyscrasias: such as leukopenia or thrombocytopenia.
• Acute renal failure: sudden decline in kidney function.

When prescribing indapamide, clinicians should consider several precautionary measures to ensure patient safety.

• Monitor electrolytes: check serum potassium, sodium and magnesium regularly.
• Assess renal function: evaluate creatinine clearance before initiation and during therapy.
• Use caution in elderly: increased sensitivity to volume depletion and hypotension.
• Review concomitant antihypertensives: avoid excessive blood pressure lowering.
• Adjust dose in hepatic impairment: consider reduced clearance.
• Store at room temperature: keep in the original container, protect from moisture and direct sunlight.

Indapamide can interact with other medicines, altering its efficacy or safety profile.

Major Interactions (Avoid)

• Lithium: increased lithium levels may cause toxicity.
• NSAIDs (e.g., ibuprofen, naproxen): may reduce diuretic effect and impair renal function.
• ACE inhibitors or ARBs: combined use can precipitate significant drops in blood pressure and renal impairment.
• Antidiabetic agents (insulin, sulfonylureas): enhanced hypoglycemic effect.
• Cyclosporine: increased risk of nephrotoxicity.

Moderate Interactions (Monitor Closely)

• Beta‑blockers: additive blood pressure lowering; monitor for bradycardia.
• Calcium channel blockers: may increase risk of hypotension.
• Warfarin: indapamide may potentiate anticoagulant effect; monitor INR.