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Aten 100mg
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Atenolol is a beta-blocker drug that affects the heart and circulation (blood flow through arteries and veins). It is prescribed primarily for the treatment of hypertension (high... Read more

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SKU: 67
Generic For: Tenormin
Active Ingredient: Atenolol
Manufacturer: Intas Pharmaceuticals, India
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Buy Aten 100mg (Atenolol) Online

Aten 100mg is a prescription oral tablet containing Atenolol 100mg, a cardioselective beta-1 adrenergic receptor blocker used for the management of hypertension, angina pectoris, and cardiac arrhythmias, and as part of secondary prevention following myocardial infarction. Aten 100mg provides the higher of the two principal clinical doses of Atenolol — a dose used when the 50mg starting dose has not achieved adequate blood pressure or heart rate control, or when the indication — particularly post-myocardial infarction secondary prevention or high-resting-heart-rate hypertension — requires more complete beta-1 blockade. Atenolol’s beta-1 selectivity at standard doses minimises the unwanted bronchoconstriction and peripheral vasoconstriction effects of non-selective beta-blockade, making it better tolerated than older beta-blockers in patients with mild-to-moderate airways disease and peripheral vascular disease.

What is Aten 100mg?

Aten 100mg is an oral tablet containing Atenolol 100mg — the dose that achieves near-maximal beta-1 receptor blockade from Atenolol, producing the greatest reduction in heart rate, blood pressure, and myocardial oxygen demand available from this molecule. Atenolol’s long plasma half-life of 6 to 7 hours, combined with its once-daily clinical dosing at 50 to 100mg, provides 24-hour beta-1 blockade from a single tablet — reducing the blood pressure elevation and heart rate increase associated with the early morning sympathetic surge that is directly linked to the peak incidence of myocardial infarction, stroke, and sudden cardiac death. At 100mg, Atenolol produces the most consistent reduction in resting and exercise heart rate across the dose range, providing maximum protection against effort angina and the most reliable heart rate control in patients with supraventricular tachycardias on Atenolol monotherapy.

Manufacturer: Aten 100mg is manufactured by Cipla. Aten brand spans the full Atenolol dose range, providing a familiar and reliable beta-blocker for both initiation and maintenance therapy at the maximum dose. 

Aten 100mg: Key Ingredients and Their Role in the Body

The heart & blood pressure medicine Aten 100mg contains Atenolol, a beta-blocker commonly used to manage high blood pressure, chest pain (angina), and heart-related conditions. It works by blocking the effects of stress hormones, such as adrenaline, on the heart and blood vessels. This helps slow the heart rate, reduce blood pressure, and decrease the heart’s workload. By improving blood circulation and regulating heart rhythm, Aten 100mg reduces the risk of complications such as heart attack and stroke. The medicine should be taken regularly under medical supervision for effective cardiovascular management.

Clinical Uses of Atenolol 100mg

Aten 100mg is used for hypertension where 50mg has not achieved target blood pressure control, as monotherapy or in combination with calcium channel blockers or diuretics. In effort angina, Atenolol 100mg once daily reduces the frequency and severity of anginal episodes by blunting the exercise-induced increase in heart rate and blood pressure that elevates myocardial oxygen demand beyond the supply capacity of stenosed coronary arteries. Post-myocardial infarction, beta-blockade with Atenolol 100mg is a Class I indication in guidelines for secondary cardiovascular risk reduction — reducing reinfarction rates, ventricular arrhythmias, and sudden cardiac death through the sympatholytic and anti-ischaemic effects of sustained beta-1 blockade. For supraventricular tachyarrhythmias, including atrial flutter and atrial fibrillation, heart and blood pressure medicines control the ventricular rate by slowing AV nodal conduction, providing rate control as part of a rhythm or rate management strategy.

Comparing Aten 100mg and Tenormin 100mg: Brand vs Generic Differences

Tenormin 100mg (AstraZeneca) is the originator-branded Atenolol product — the formulation used in the UKPDS and ASCOT trials that established beta-blocker therapy in the management of hypertension. Aten 100mg contains Atenolol 100mg formulated to deliver bioequivalent plasma Atenolol exposure to Tenormin, with the same Cmax, AUC, and half-life confirming equivalent beta-1 receptor occupancy and clinical pharmacodynamics. The decades of clinical evidence accumulated with Tenormin — from post-MI protection to angina management — applies directly to Aten 100mg as a bioequivalent generic.

Related strengths and products: Aten 50mg is the standard starting and lower-maintenance dose for most hypertensive patients. For combination antihypertensive therapy, Amlopres 5mg (Amlodipine) provides complementary calcium channel blockade, and Cardivas 3.125mg (Carvedilol) is an alternative non-selective beta-blocker with alpha-blocking activity for patients requiring dual adrenergic blockade.

Key Benefits of Aten 100mg

Aten 100mg delivers the most complete beta-1 blockade achievable from Atenolol — the beta-blocker most commonly used in cardiovascular outcome trials and one of the most extensively studied antihypertensive agents in clinical medicine — at the dose required for patients who need maximum heart rate and blood pressure reduction from this class. The water-soluble, CNS-sparing pharmacological profile of Atenolol is preserved at 100mg, providing the cardiovascular protection of beta-blockade with lower rates of CNS side effects than lipophilic alternatives. The once-daily dosing schedule simplifies the regimen for patients managing multiple chronic medications.

Usage warnings and precautionary advice for using Atenolol 100mg

 

Atenolol is contraindicated in patients with significant bradycardia (resting heart rate below 45 to 50 bpm), second- or third-degree AV heart block (without a pacemaker), cardiogenic shock, decompensated heart failure not stabilised by diuretics, and severe peripheral arterial disease with rest ischaemia. Although Atenolol’s cardioselectivity makes it preferable to non-selective beta-blockers in patients with mild reversible airway disease, it should be used with great caution in asthma and is contraindicated when significant bronchospasm is present. The combination with verapamil or diltiazem (non-dihydropyridine CCBs) can cause dangerous bradycardia and complete heart block; concurrent use requires very close monitoring or should be avoided. Atenolol reduces insulin sensitivity and can alter the glycaemic response to antidiabetic therapy; regular blood glucose monitoring is advisable in patients with diabetes.

Side effects of Atenolol 100mg

 

Aten 100mg is generally well tolerated in patients with appropriate indications. Bradycardia — a reduced heart rate below 50 bpm — is the most clinically important adverse effect and reflects on-target pharmacological action; dose reduction is required if it produces symptoms. Cold extremities and peripheral vasoconstriction are common, reflecting the relative unopposed alpha-adrenergic tone when beta-mediated vasodilation is removed. Some patients experience fatigue and reduced exercise tolerance, reflecting a reduced cardiac output response to exertion due to beta-1 blockade. Atenolol is one of the drugs that can cause erectile problems, which may be due to reduced genital blood flow. Dizziness, particularly orthostatic, can occur at the initiation of treatment. Unlike lipophilic beta-blockers, Atenolol produces relatively few CNS side effects; however, sleep disturbance and low mood have been occasionally reported.

 

Benefits of Buying Aten 100mg Online from AllDayChemist

 

AllDayChemist provides genuine Atenolol 100mg at competitive prices, with reliable international home delivery, making high-dose Atenolol therapy accessible for patients with hypertension, angina, or post-MI cardiovascular protection requirements who need uninterrupted daily beta-blocker therapy. AllDayChemist’s 14-tablet pack and repeat-order service ensure that patients are never left without their essential cardiovascular medication.

Proper dosage and usage guide of Atenolol 100mg

 

Take one Aten 100mg tablet orally once daily at the same time each day, with or without food. Blood pressure and resting heart rate should be monitored regularly during initiation and after dose adjustments. Do not stop Aten 100mg abruptly — sudden discontinuation of beta-blocker therapy can cause rebound tachycardia, hypertension, worsening angina, and in patients with coronary artery disease, precipitate myocardial ischaemia or infarction; if discontinuation is planned, taper gradually over 1 to 2 weeks under physician supervision. Patients with diabetes should be aware that Atenolol may mask tachycardia, which normally signals hypoglycaemia, though sweating — the other key hypoglycaemia warning sign — is not suppressed. Dose adjustment is required in renal impairment because Atenolol is primarily renally excreted; the prescribing physician will adjust the dose accordingly. Also, follow the diet tips provided by your health care specialist to lower your blood pressure. Store at room temperature below 30°C.

What is Aten 100mg used for?

Aten 100mg contains Atenolol 100mg, a cardioselective beta-1 adrenergic blocker used to treat hypertension, angina pectoris, and certain cardiac arrhythmias. Unlike non-selective beta blockers (propranolol), Atenolol primarily blocks beta-1 receptors in the heart with less effect on beta-2 receptors in the lungs, making it safer than non-selective beta blockers in patients with mild respiratory disease.

How does Atenolol in Aten 100mg work?

Atenolol selectively blocks beta-1 adrenergic receptors in the heart, reducing heart rate, cardiac contractility, and the release of renin from the kidneys. This results in lower cardiac output and reduced blood pressure. In angina, the slower heart rate and reduced cardiac workload decrease myocardial oxygen demand below the ischaemic threshold. For arrhythmias, beta-1 blockade reduces abnormal electrical activity in the heart.

What is the correct dose of Aten 100mg?

Aten 100mg is typically the maintenance dose for adults with hypertension or angina who have been established on lower doses (25mg or 50mg). It is taken once daily in the morning. The maximum dose for hypertension is 100mg once daily; for angina, doses up to 200mg per day may be used under cardiologist guidance. At 100mg, blood pressure and heart rate response should be assessed after four weeks.

Can Aten 100mg be taken once daily?

Yes. Atenolol's half-life of six to seven hours means that once-daily dosing provides adequate 24-hour beta blockade for most patients, particularly when heart rate control (rather than short-term anti-anginal coverage) is the primary goal. For angina management where peak blood pressure and heart rate during exertion matter, twice-daily dosing (50mg twice daily rather than 100mg once daily) may provide more even coverage throughout the day.

Is Aten 100mg safe in patients with COPD?

Atenolol is cardioselective (beta-1 selective) and is safer than non-selective beta blockers in patients with mild-to-moderate COPD. However, selectivity is not absolute — at 100mg, some beta-2 receptor blockade occurs, potentially causing modest bronchoconstriction. Use with caution in COPD and monitor respiratory symptoms. In severe COPD with significant bronchospastic component, consider bisoprolol (higher selectivity) or avoid beta blockers entirely with cardiologist guidance.

Can Aten 100mg affect blood sugar levels?

Atenolol can mask tachycardia — a key warning sign of hypoglycaemia — in insulin-dependent diabetics. It may also slightly impair the recovery from hypoglycaemia. Atenolol is less metabolically harmful than non-selective beta blockers but can still impair insulin sensitivity. Diabetic patients on Aten 100mg should monitor glucose more frequently and be aware of alternative hypoglycaemia symptoms (sweating, confusion).

How does Aten 100mg compare to Tenormin 100mg?

Aten 100mg and Tenormin 100mg (AstraZeneca originator) both contain Atenolol 100mg. Tenormin was the originator brand from which Atenolol first entered widespread use. Aten from Zydus is the bioequivalent generic, providing identical heart rate reduction and blood pressure lowering at a significantly lower cost. AllDayChemist offers Aten 100mg at competitive international pricing.

Is generic Atenolol 100mg as effective as brand Tenormin?

Yes. Generic Atenolol 100mg is bioequivalent to Tenormin and produces identical heart rate and blood pressure responses. Generic Atenolol is among the most established and used generic cardiovascular medications globally. Note: the LIFE trial showed Losartan was superior to Atenolol for stroke prevention in high-risk hypertensives — this limitation applies to all Atenolol formulations equally, regardless of brand or generic status.

Can I buy Aten 100mg from AllDayChemist?

Yes. Aten 100mg is available at AllDayChemist with worldwide shipping to the USA, UK, Australia, and 200+ countries. AllDayChemist has operated since 2002 with direct manufacturer sourcing. Orders ship in discreet, plain packaging with tracking. Free shipping is available on qualifying orders. Visit AllDayChemist.com.

Why order Aten 100mg from AllDayChemist?

AllDayChemist offers Aten 100mg at significantly lower prices than Tenormin or retail generic Atenolol in Western markets. Since 2002, AllDayChemist has served 200+ countries with authentic, manufacturer-sourced cardiac medications. Discreet delivery, free shipping on qualifying orders, consistent supply, and customer support make it the preferred choice for long-term beta blocker therapy.

What side effects does Aten 100mg cause?

Aten 100mg side effects include fatigue (the most common and sometimes dose-limiting effect), bradycardia, cold extremities, dizziness, sleep disturbances, and constipation. Erectile dysfunction is reported in a proportion of male patients on beta blockers. Unlike Propranolol, Atenolol is hydrophilic and does not cross the blood-brain barrier significantly, so nightmares and vivid dreams are less common. Worsening of Raynaud's phenomenon can occur.

What precautions are essential for Aten 100mg?

Never stop Aten 100mg abruptly — sudden withdrawal can precipitate rebound tachycardia, angina, or myocardial infarction. Taper slowly under medical guidance. Contraindicated in cardiogenic shock, decompensated heart failure, sick sinus syndrome, and significant AV block. Avoid in severe asthma. Inform your anaesthetist before any surgery. Diabetics must monitor glucose carefully. Do not combine with verapamil or diltiazem without cardiac monitoring.

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