Hysadrac (Losartan Potassium, Hydrochlorothiazide)

• Hysadrac combines an ARB and a thiazide diuretic to manage conditions within the cardiovascular and renal disease spectrum.
• Hypertension: reduces systolic and diastolic pressure in primary hypertension.
• Diabetic nephropathy: helps slow progression of kidney damage in type 2 diabetes.
• Heart failure: used as adjunct therapy to control fluid overload and blood pressure in chronic heart failure.

• Losartan potassium selectively blocks angiotensin II type 1 (AT1) receptors, preventing vasoconstriction and aldosterone‑mediated sodium retention. Hydrochlorothiazide inhibits Na⁺/Cl⁻ reabsorption in the distal convoluted tubule, increasing urinary excretion of sodium and water. The combined actions lower peripheral vascular resistance and blood volume, producing an additive antihypertensive effect.

Common Side Effects

• Dizziness or light‑headedness
• Headache
• Fatigue or weakness
• Increased urination
• Mild electrolyte disturbances (e.g., low potassium)
• Dry mouth or mild gastrointestinal upset

Serious or Rare Side Effects

• Severe dehydration or electrolyte imbalance
• Hyperkalemia or marked potassium loss
• Angioedema or swelling of the face, lips, or throat
• Acute kidney injury or significant rise in serum creatinine
• Severe hypotension leading to fainting
• Allergic skin reactions such as rash or Stevens‑Johnson syndrome

• Before initiating therapy, consider the following precautions.
• Monitor blood pressure regularly: ensure target levels are achieved without excessive drops.
• Check serum electrolytes: especially potassium and sodium, at baseline and during treatment.
• Assess renal function: evaluate creatinine and eGFR before and after starting.
• Avoid use in severe hepatic impairment: dose adjustments may be required.
• Pregnancy and lactation: use only if clearly needed, as safety data are limited.
• Store at ambient temperature: keep in the original container, protect from moisture and direct sunlight.

Hysadrac may interact with several medicines; review patient medication lists.

Major Interactions (Avoid)

• ACE inhibitors or aliskiren: risk of additive renal dysfunction and hyperkalemia.
• Potassium‑sparing diuretics or supplements: may cause dangerous hyperkalemia.
• Lithium: increased lithium levels leading to toxicity.
• NSAIDs: can blunt antihypertensive effect and impair renal function.
• Cyclosporine or tacrolimus: heightened risk of nephrotoxicity.

Moderate Interactions (Monitor Closely)

• Other antihypertensives (beta‑blockers, calcium channel blockers): may cause excessive blood pressure lowering.
• Diuretics with similar electrolyte effects: monitor potassium and sodium.
• CYP2C9 inhibitors (e.g., fluconazole): may increase losartan levels.
• Antacids containing aluminum or magnesium: may reduce hydrochlorothiazide absorption.