GIOTENSIN TRIO

Description

What is this medicine for?

This combination helps to control high blood pressure when one or two medicines alone are not enough.

Pharmacological Classification

Telmisartan: Angiotensin II Receptor Blocker (ARB)
Amlodipine: Dihydropyridine Calcium Channel Blocker (CCB)
Chlorthalidone: Thiazide-like Diuretic

Mechanism of Action

Telmisartan: Selectively antagonizes angiotensin II at the AT? receptor, preventing vasoconstriction and aldosterone-mediated sodium retention ? reduces peripheral resistance and blood pressure.
Amlodipine: Inhibits calcium ion influx through L-type channels in vascular smooth muscle ? vasodilation and reduced systemic vascular resistance.
Chlorthalidone: Inhibits sodium and chloride reabsorption in the early distal tubules ? increases urinary excretion of sodium, chloride, and water ? reduces plasma volume and blood pressure.

Combined Effect: Triple antihypertensive action via RAAS blockade, vascular smooth muscle relaxation, and volume reduction ? synergistic and sustained BP lowering with improved 24-hour control.

Indications

Essential hypertension not adequately controlled by dual combination therapy
High cardiovascular risk patients needing aggressive BP control

Dosage Forms

Telmisartan 40 mg + Amlodipine 5 mg + Chlorthalidone 12.5 mg
Telmisartan 80 mg + Amlodipine 5 mg + Chlorthalidone 12.5 mg

Advantages of Triple Combination

Complementary mechanisms ? enhanced BP reduction
Better 24-hour BP control and reduced BP variability
Lower dose-related adverse effects compared to high-dose monotherapy
Chlorthalidone’s diuretic effect offsets amlodipine-induced pedal edema
Improves patient compliance via single-pill regimen

Drug Interactions

Potassium supplements / potassium-sparing diuretics ? hyperkalemia risk
NSAIDs ? may reduce antihypertensive effect, risk of renal impairment
Lithium ? increased lithium levels/toxicity
CYP3A4 inhibitors/inducers ? may alter amlodipine metabolism