Indapa-Plus Tablet

Introduction

Perindopril and indapamide is a combination medication used primarily to treat hypertension (high blood pressure) and to reduce the risk of cardiovascular events in patients with a history of coronary artery disease.

Uses

This combination is used for:

• Managing high blood pressure (hypertension)
• Reducing the risk of stroke, heart attack, and other cardiovascular events in patients with coronary artery disease
• Treating patients with heart failure or left ventricular dysfunction

Mechanism of Action

Perindopril is an angiotensin-converting enzyme (ACE) inhibitor that works by blocking the enzyme responsible for converting angiotensin I to angiotensin II, a potent vasoconstrictor. This leads to vasodilation and reduced blood pressure. Indapamide is a thiazide-like diuretic that helps lower blood pressure by promoting the excretion of sodium and water, reducing fluid overload and blood volume.

How Long Does It Take to Work?

The antihypertensive effects of perindopril typically begin within 1-2 hours after ingestion, with peak effects seen in 4-6 hours. The blood pressure-lowering effects of indapamide can be observed within a few hours, with maximal effects achieved over several days.

Absorption

Perindopril is well-absorbed from the gastrointestinal tract, with peak plasma concentrations occurring within 1 hour. Indapamide is also well-absorbed, with peak plasma levels reached within 1-2 hours.

Route of Elimination

Perindopril is primarily excreted in the urine, with approximately 60% of the dose eliminated as inactive metabolites and 20% as unchanged drug. Indapamide is excreted primarily through the urine, with a small portion eliminated in the feces.

Dosage

The typical dosage is:

• Perindopril 4 mg to 8 mg once daily
• Indapamide 1.5 mg once daily

Administration

The combination medication is usually taken once daily, preferably in the morning. It should be taken with or without food, and the tablets should be swallowed whole with a glass of water.

Side Effects

Common side effects may include:

• Dizziness or lightheadedness
• Headache
• Nausea
• Fatigue

Toxicity

In case of overdose, symptoms may include severe hypotension, electrolyte imbalances, and dehydration. Treatment is supportive and symptomatic. Seek immediate medical attention in the event of an overdose.

Precautions

- Monitor renal function and electrolytes regularly, especially in patients with pre-existing kidney issues. - Use cautiously in patients with a history of angioedema or severe hypersensitivity reactions. - Caution is advised in patients with a history of gout, diabetes, or liver disease.

Interaction

This combination may interact with:

• Other antihypertensives (may have additive effects)
• Non-steroidal anti-inflammatory drugs (NSAIDs) (may reduce antihypertensive effects)
• Potassium-sparing diuretics (may increase risk of hyperkalemia)

Disease Interaction

- Use with caution in patients with renal impairment or liver disease, as these conditions may alter drug metabolism and excretion. - Monitor blood glucose levels in diabetic patients, as thiazide-like diuretics can affect glucose tolerance.

Drug Interaction

- ACE inhibitors can interact with drugs that affect the renin-angiotensin system (e.g., ARBs, direct renin inhibitors). - Thiazide-like diuretics can interact with lithium, leading to increased lithium levels and toxicity.

Food Interactions

Food does not significantly affect the absorption of this medication. However, a high-salt diet may reduce the efficacy of the antihypertensive effects.

Pregnancy Use

This combination is generally not recommended during pregnancy, especially in the second and third trimesters, due to potential harm to the fetus. Consult a healthcare provider for alternatives if pregnancy is planned or suspected.

Lactation Use

It is not known whether perindopril and indapamide are excreted in breast milk. Use during lactation should be approached with caution, and alternative treatments should be considered.

Acute Overdose

Acute overdose may lead to severe hypotension, electrolyte imbalances, and dehydration. Immediate medical treatment is necessary to address these issues and to provide supportive care.

Contraindication

This combination is contraindicated in:

• Patients with a history of angioedema related to previous ACE inhibitor therapy
• Severe renal impairment
• Pregnancy

Use Direction

Swallow the tablet whole, do not chew or crush. Take once daily in the morning with or without food. Adhere to the prescribed dosage and consult a healthcare provider for any adjustments or concerns.

Storage Conditions

Store at room temperature, away from moisture and heat. Keep out of reach of children.

Volume of Distribution

The volume of distribution for perindopril is approximately 0.2-0.4 L/kg, reflecting its distribution primarily in the bloodstream and tissues. For indapamide, the volume of distribution is approximately 0.4-0.8 L/kg.

Half Life

The half-life of perindopril is approximately 1-2 hours, while its active metabolite, perindoprilat, has a half-life of 8-9 hours. Indapamide has a half-life of about 14-24 hours.

Clearance

Perindopril is cleared from the body primarily through the kidneys. Indapamide is also cleared primarily through the kidneys, with a small portion eliminated through the feces.