Atenolol 100mg Tablets Pocco/Eden
Active ingredient : Atenolol
Strength : 100mg
Drug class : Beta-1 selective blocker
Requires prescription : Yes
How does atenolol work?
Atenolol blocks beta-1 receptors in the heart — the receptors that respond to adrenaline. By blocking them, it slows the heart rate, reduces the force of each heartbeat, and lowers the electrical activity that can cause irregular rhythms. The result is a heart that beats more slowly, more steadily, and with less effort — which brings blood pressure down and reduces strain on the cardiovascular system.
Slower heart rate
Lower blood pressure
Steadier heart rhythm
Less cardiac workload
What is atenolol 100mg used for?
High blood pressure (hypertension)
Lowers blood pressure steadily over 24 hours, reducing the risk of stroke, heart attack, and kidney damage. The 100mg dose is prescribed when the standard 50mg dose has not achieved adequate control.
Angina (chest pain)
By slowing the heart and reducing its oxygen demand, atenolol decreases the frequency and severity of angina episodes, allowing patients to be more active with less discomfort.
Irregular heartbeat (arrhythmia)
Helps control heart rate in conditions such as atrial fibrillation (AF) and supraventricular tachycardia (SVT), restoring a more normal, manageable rhythm.
After a heart attack (secondary prevention)
Prescribed following a myocardial infarction to reduce the risk of a second heart attack and protect the heart during recovery by reducing its workload.
Overactive thyroid (hyperthyroidism) — short-term use
Used to manage rapid heart rate and palpitations caused by an overactive thyroid while the underlying condition is being treated.
Dosage & how to take
| Hypertension dose | 25mg–100mg once daily |
| Angina dose | 50mg–100mg once daily |
| Arrhythmia dose | 50mg–100mg once daily |
| When to take | Same time each day, with or without food |
| Kidney impairment | Dose reduction may be needed — follow your doctor's advice |
| Missed dose | Take as soon as you remember; skip if nearly time for next dose. Never double up. |
Never stop atenolol suddenly — this can cause a rebound rise in heart rate and blood pressure, and may trigger a heart attack in patients with coronary artery disease. Always reduce the dose gradually under medical supervision.
Who should not take atenolol 100mg?
Key things to know before buying
Common side effects
Most side effects are mild and tend to improve as your body adjusts to the medicine. Contact your doctor if your heart rate drops very low, you feel unusually breathless, or experience chest tightness.