Beta-blocker (Heart and blood pressure medicine)
Brand of Atenolol
Last reviewed June 2026
Who is this for?
Atenolol is a heart and blood pressure medicine that works by slowing down your heart rate and relaxing your blood vessels, making it easier for your heart to pump blood around your body.
Blocks beta-1 adrenergic receptors in the heart and blood vessels, reducing heart rate, cardiac contractility, and blood pressure while decreasing myocardial oxygen demand. This selective beta-blockade also stabilizes cardiac electrical activity, reducing arrhythmias and anginal episodes.
Prescription Required
You need a doctor's prescription to buy this drug.
Explore this drug
Most adults start with one 50 mg tablet taken once a day. Your doctor may increase this to 100 mg once daily depending on how your body responds. Swallow the tablet whole with water — you can take it with or without food, but try to take it at the same time every day, preferably in the morning. Do not stop taking it suddenly without your doctor's advice, as this can be dangerous.
If you miss a dose, take it as soon as you remember — but if it is almost time for your next dose, skip the missed one and continue as normal. Never take two tablets at once to make up for a missed dose.
Do not stop taking Atenolol suddenly — stopping abruptly can cause a dangerous spike in blood pressure or trigger chest pain, so always reduce the dose gradually with your doctor's guidance. Buy only from registered pharmacies and look out for Nigerian brands like Synormin, Eden Atenolol, Pocco Atenolol, or Atenomel — avoid unregistered roadside sellers. This is a long-term medication, so keep taking it even if you feel fine, because high blood pressure often has no symptoms.
Avoid drinking alcohol while on Atenolol as it can make dizziness and low blood pressure worse. Be careful if you are also taking other blood pressure medicines like Amlodipine or Nifedipine, as combining them can cause your blood pressure to drop too low. If you are using diabetes medicines like Metformin or insulin, Atenolol can hide the signs of low blood sugar (like fast heartbeat), so monitor your sugar levels closely.
Check your specific combination
Is it safe to take Atenolol with your other drugs?
Atenolol is not safe during pregnancy as it can harm the unborn baby and affect its growth — it can also pass into breast milk, so consult your doctor before using it if you are pregnant, planning to get pregnant, or breastfeeding.
Store in a cool, dry place away from direct sunlight and heat — Nigerian weather can be hot, so avoid leaving it near windows, in your car, or in humid bathrooms. Keep the tablets in their original pack and far away from children.
For information only — not medical advice. Always talk to a doctor or pharmacist before changing your medication.
Names this drug is sold under — especially in Nigerian and West African pharmacies
Counterfeit Drug Warning
Fake drugs are a serious problem in Nigeria. Always buy from a registered pharmacy. If the packaging looks different from what is described above, do not use it.
Genuine packaging for Eden Atenolol 100 mg Tablet
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NAFDAC Number
B4-6761
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