Blopress Comp (Candesartan / Hydrochlorothiazide)

What Is Blopress Comp and What Is It Used For?

Quick Answer: Blopress Comp is a fixed-dose combination tablet containing candesartan cilexetil and hydrochlorothiazide. It is used to treat essential hypertension (high blood pressure) in adults whose blood pressure is not adequately controlled by either candesartan or hydrochlorothiazide alone.

Blopress Comp belongs to a class of medicines known as combination antihypertensives. It contains two active substances that work through different but complementary mechanisms to lower blood pressure. Candesartan cilexetil is an angiotensin II receptor blocker (ARB) that prevents the hormone angiotensin II from binding to its receptors in blood vessel walls. This causes the blood vessels to relax and widen, reducing the resistance against which the heart must pump. Hydrochlorothiazide is a thiazide diuretic that acts on the kidneys to increase the excretion of sodium and water, reducing blood volume and further lowering blood pressure.

The rationale for combining these two agents is well-established in clinical medicine. The European Society of Cardiology (ESC) and European Society of Hypertension (ESH) guidelines recommend combination therapy as the preferred initial treatment strategy for most patients with hypertension, as dual therapy achieves target blood pressure in a significantly higher proportion of patients than monotherapy. The synergistic mechanism of ARB plus diuretic means that the blood-pressure-lowering effects are greater than the sum of each component alone.

Blopress Comp is specifically indicated for the treatment of essential hypertension in adults. Essential (or primary) hypertension accounts for approximately 90–95% of all hypertension cases and has no identifiable cause, unlike secondary hypertension which results from an underlying condition. Uncontrolled hypertension significantly increases the risk of cardiovascular events including stroke, myocardial infarction, heart failure, chronic kidney disease, and peripheral vascular disease. According to the World Health Organization (WHO), hypertension is a leading modifiable risk factor for cardiovascular mortality worldwide, affecting an estimated 1.28 billion adults globally.

Candesartan cilexetil is a prodrug that is rapidly converted to its active metabolite, candesartan, during absorption from the gastrointestinal tract. Candesartan is a highly selective and potent AT1 receptor antagonist. By blocking the AT1 receptor, candesartan prevents angiotensin II from exerting its vasoconstrictive effects, from stimulating aldosterone secretion (which would otherwise cause sodium and water retention), and from promoting pathological remodelling of the heart and blood vessels. Clinical trials have demonstrated that candesartan provides smooth, sustained 24-hour blood pressure control with once-daily dosing.

Hydrochlorothiazide (HCTZ) is one of the most widely prescribed diuretics in clinical practice. It acts primarily on the distal convoluted tubule of the nephron, where it inhibits the sodium-chloride cotransporter (NCC). By blocking sodium reabsorption, HCTZ increases the amount of sodium and water excreted in the urine. The initial blood pressure reduction with HCTZ is primarily due to decreased blood volume; however, with long-term use, the antihypertensive effect is sustained primarily through reduced peripheral vascular resistance.

What Should You Know Before Taking Blopress Comp?

Quick Answer: Blopress Comp must not be used during pregnancy, in patients with severe kidney or liver disease, or in those with persistently low potassium or high calcium levels. Tell your doctor about all medicines you take, as several important drug interactions exist.

Contraindications

There are several situations in which Blopress Comp must not be used. You should not take Blopress Comp if you:

• Are allergic to candesartan cilexetil, hydrochlorothiazide, or any of the other ingredients in the tablet
• Are allergic to sulfonamide-derived medicines (hydrochlorothiazide is a sulfonamide derivative)
• Are in the second or third trimester of pregnancy (use in the first trimester is also not recommended)
• Have severe kidney impairment (creatinine clearance below 30 mL/min) or anuria (no urine production)
• Have severe liver impairment or biliary cirrhosis (cholestasis)
• Have refractory hypokalaemia (persistently low potassium), hyponatraemia (low sodium), or hypercalcaemia (high calcium)
• Have symptomatic hyperuricaemia or active gout
• Are taking aliskiren if you have diabetes mellitus or moderate to severe renal impairment (GFR <60 mL/min)

Warnings and Precautions

Before starting Blopress Comp, inform your doctor about your complete medical history. Several conditions require special caution or dose adjustment:

Renal impairment: Patients with mild to moderate kidney problems may use Blopress Comp, but regular monitoring of kidney function (serum creatinine, potassium, and eGFR) is essential. Both components can affect kidney function, and candesartan may cause an initial rise in serum creatinine, particularly in patients with renovascular disease (e.g. renal artery stenosis). In patients with bilateral renal artery stenosis or stenosis of the artery to a single functioning kidney, ARBs may cause severe renal failure and are contraindicated.

Hepatic impairment: Patients with mild to moderate liver impairment may require dose adjustment and closer monitoring. The metabolism of candesartan is partly hepatic, and HCTZ may precipitate hepatic coma in patients with pre-existing liver disease due to electrolyte disturbances.

Volume depletion and dehydration: Patients who are volume-depleted (e.g. from diuretic therapy, dietary salt restriction, dialysis, diarrhoea, or vomiting) are at increased risk of symptomatic hypotension when starting Blopress Comp. Volume depletion should be corrected before initiating treatment, or a lower starting dose should be used.

Electrolyte imbalances: Hydrochlorothiazide can cause hypokalaemia (low potassium), hyponatraemia (low sodium), and hypomagnesaemia (low magnesium). Conversely, candesartan may increase serum potassium. The net effect on potassium balance is variable, but monitoring remains important. Patients should report symptoms such as muscle cramps, weakness, irregular heartbeat, or excessive thirst.

Diabetes mellitus: HCTZ may impair glucose tolerance and increase blood glucose levels. Diabetic patients may require adjustment of their insulin or oral hypoglycaemic agent dosage. Do not combine with aliskiren if you have diabetes.

Pregnancy and Breastfeeding

Pregnancy: Blopress Comp is strictly contraindicated during the second and third trimesters of pregnancy. Exposure to ARBs during these trimesters has been associated with fetotoxicity including renal failure, oligohydramnios, skull ossification defects, hypotension, and death. Use during the first trimester is not recommended. Women of childbearing potential must use reliable contraception during treatment. If pregnancy is detected, Blopress Comp should be discontinued as soon as possible and an alternative antihypertensive initiated. Infants exposed in utero should be closely monitored for hypotension, oliguria, and hyperkalaemia.

Breastfeeding: It is not known whether candesartan is excreted in human breast milk, but it is excreted in the milk of lactating rats. Hydrochlorothiazide is excreted in human breast milk in small amounts and may suppress lactation. Due to the potential for adverse effects in the nursing infant, Blopress Comp is not recommended during breastfeeding. Your doctor may prescribe an alternative antihypertensive that is compatible with breastfeeding.

How Does Blopress Comp Interact with Other Drugs?

Quick Answer: Blopress Comp interacts with several commonly used medicines. Important interactions include lithium, NSAIDs, other blood-pressure-lowering drugs, potassium supplements, and digoxin. Always tell your doctor about all medicines, supplements, and herbal products you are taking.

Drug interactions with Blopress Comp can be clinically significant and may affect both the efficacy and safety of treatment. Understanding these interactions is essential for safe medication management. Both components of Blopress Comp contribute to its interaction profile.

Major Interactions

Other Notable Interactions

What Is the Correct Dosage of Blopress Comp?

Quick Answer: The usual starting dose of Blopress Comp is one tablet of 8 mg/12.5 mg or 16 mg/12.5 mg once daily. Your doctor will select the appropriate strength based on your current treatment and blood pressure response. The maximum recommended dose is 32 mg/25 mg once daily.

Blopress Comp is designed as a step-up therapy for patients whose blood pressure is not adequately controlled on monotherapy. The appropriate dose depends on the patient's previous treatment, current blood pressure levels, and individual response. The medicine should be taken at the same time each day, preferably in the morning, and can be taken with or without food. The tablet should be swallowed whole with a glass of water.

Adults

The dose is usually titrated at intervals of at least 4 weeks, as the full antihypertensive effect of candesartan requires approximately 4–6 weeks to develop. If blood pressure remains above target, the dose may be increased stepwise. Your doctor will determine the optimal dose based on regular blood pressure measurements.

Children and Adolescents

Blopress Comp is not recommended for use in children and adolescents under 18 years of age. The safety and efficacy of the combination product have not been established in the paediatric population. If a child or adolescent requires antihypertensive treatment, a specialist should be consulted for appropriate medication selection and dosing.

Elderly Patients

No specific dose adjustment is routinely required for elderly patients. However, treatment should be initiated cautiously, as elderly individuals are more susceptible to volume depletion, electrolyte disturbances, and orthostatic hypotension (dizziness when standing up). A lower starting dose of 8/12.5 mg may be appropriate. Renal function should be assessed before starting treatment and monitored regularly thereafter, as age-related decline in kidney function is common and may not be reflected in serum creatinine alone.

Missed Dose

If you forget to take a dose, take it as soon as you remember on the same day. If it is almost time for your next scheduled dose, skip the missed dose and continue with your regular dosing schedule. Do not take a double dose to make up for a forgotten tablet, as this increases the risk of low blood pressure and dizziness. If you frequently forget doses, consider setting a daily reminder or using a pill organiser to help maintain consistent dosing.

Overdose

Symptoms of overdose are expected to be mainly related to excessive blood pressure reduction, including pronounced dizziness, lightheadedness, and fainting. Hydrochlorothiazide overdose may additionally cause marked electrolyte depletion (hypokalaemia, hyponatraemia), dehydration, and symptoms such as nausea, drowsiness, muscle cramps, and cardiac arrhythmias. If overdose is suspected, seek emergency medical attention immediately. Treatment is supportive: the patient should be placed in the supine position with legs elevated, and intravenous normal saline may be required. Candesartan is not significantly removed by haemodialysis.

What Are the Side Effects of Blopress Comp?

Quick Answer: Common side effects include dizziness, headache, fatigue, and increased urination. Metabolic changes such as elevated blood glucose, uric acid, and cholesterol may occur due to the hydrochlorothiazide component. Serious but rare side effects include severe hypotension, acute kidney injury, and hyperkalaemia.

Like all medicines, Blopress Comp can cause side effects, although not everybody experiences them. Most side effects are mild and tend to diminish as your body adjusts to the medicine. The side effects listed below reflect the combined adverse event profile of both candesartan and hydrochlorothiazide as observed in clinical trials and post-marketing surveillance. The frequencies are classified according to the standard convention used by the European Medicines Agency (EMA).

Hydrochlorothiazide is associated with metabolic side effects that warrant regular monitoring. These include dose-dependent elevations in blood glucose (which may unmask latent diabetes or worsen glycaemic control in established diabetes), increases in serum uric acid (which may precipitate gout in susceptible individuals), and mild elevations in total cholesterol and triglycerides. These metabolic effects are generally modest at the lower doses of HCTZ used in combination products (12.5–25 mg).

Post-marketing surveillance and pharmacovigilance data have additionally identified rare cases of non-melanoma skin cancer (basal cell carcinoma and squamous cell carcinoma) associated with long-term HCTZ use. Patients taking HCTZ should limit UV exposure, use sunscreen, and have regular skin checks. This association is being actively monitored by regulatory agencies including the EMA and FDA.

If you experience any side effects not listed here, or if any of the listed side effects become severe or persistent, contact your healthcare provider. You can also report side effects directly to your national pharmacovigilance authority to help improve the safety monitoring of this medicine.

How Should You Store Blopress Comp?

Quick Answer: Store Blopress Comp at room temperature (below 30°C) in the original packaging to protect from moisture. Keep out of reach of children. Do not use after the expiry date.

Proper storage of Blopress Comp is important to maintain the stability and effectiveness of the medicine. Store the tablets at room temperature, not exceeding 30°C (86°F). Do not refrigerate or freeze the tablets. Keep the medicine in its original blister packaging or container to protect it from moisture and light, as hydrochlorothiazide is sensitive to moisture exposure which can affect tablet integrity.

Keep Blopress Comp out of the sight and reach of children. Use a child-resistant storage location if available. Do not use the medicine after the expiry date printed on the packaging (the expiry date refers to the last day of that month). Do not dispose of medicines via wastewater or household waste. Ask your pharmacist how to dispose of medicines you no longer use, as proper disposal helps protect the environment.

If you notice any change in the appearance of the tablets (discolouration, crumbling, unusual smell), do not use them and consult your pharmacist for advice.

What Does Blopress Comp Contain?

Quick Answer: Each tablet contains candesartan cilexetil and hydrochlorothiazide as active ingredients. The most common strength is 8 mg candesartan cilexetil / 12.5 mg hydrochlorothiazide. Other strengths are available for dose titration.

Active substances:

• Candesartan cilexetil – available in strengths of 8 mg, 16 mg, or 32 mg per tablet. Candesartan cilexetil is the ester prodrug form that is hydrolysed to the active metabolite candesartan during absorption.
• Hydrochlorothiazide (HCTZ) – available in strengths of 12.5 mg or 25 mg per tablet. HCTZ is a benzothiadiazine derivative that acts as a thiazide diuretic.

Excipients (inactive ingredients): The tablets typically contain excipients such as lactose monohydrate, maize starch, hydroxypropylcellulose, polyethylene glycol (macrogol), carmellose calcium, magnesium stearate, and iron oxide pigments (for tablet colouring, varying by strength). Patients with known intolerance to lactose or any other excipient should inform their doctor or pharmacist before starting treatment.

Tablet appearance: The appearance of Blopress Comp tablets varies by strength. They are generally oval or round, film-coated tablets marked with identification codes on one side. The different strengths can be distinguished by colour and embossing, which helps prevent dosing errors. Refer to the patient information leaflet provided with your specific strength for exact tablet descriptions.