> Western Medicines > Atenolol

What is Atenolol for?

Atenolol is a selective beta-1 blocker like Propranolol that slows down the activity of your heart by stopping the transmission of messages from the nerves to your heart. It acts on the heart and blood vessels and therefore is widely used for cardiac problems. Atenolol can be used to treat high blood pressure, angina, arrhythmias (irregular heart rhythms), and prevent migraines.

How to use it?

Atenolol can be taken by mouth as tablets. The usual adult dose of Atenolol is 25-100 mg once daily.

What are the side effects of Atenolol?

Common side effects of Atenolol include slow heartbeat, depression, dizziness, shortness of breath, erectile dysfunction, fatigue, headache, and heart failure.

Who should not take Atenolol?

  • Anyone who has an allergy to Atenolol
  • Anyone with cardiogenic shock
  • Anyone who has sinus bradycardia

Pharmacist Tips:

  • If you miss a dose of Atenolol, take it as soon as possible. However, if the next dose is due in less than 8 hours, skip the missed dose and take the next dose on time instead.

Common dosing schedule:
Atenolol should be taken at the same time every day and can be taken with or without food.


This schedule is for reference only, adjustments may be made according to individual needs.


Some common medications Atenolol may interact with:

Atenolol may interact with a number of drugs. Consult your doctor/pharmacist if you are taking other medications to see if dose adjustment for aluminium hydroxide is needed.

Where to buy Atenolol in Hong Kong?

In Hong Kong, Atenolol is a prescription only medicine, and requires a prescription from a doctor to be purchased in a pharmacy. It can also be obtained from doctors. To find a pharmacy near you, refer to the list of pharmacies (“Authorized Sellers of Poisons”) from the Hong Kong Department of Health.


For more information about drug names and ingredients, you can visit Hong Kong’s Drug Office at https://www.drugoffice.gov.hk

Need more information?

For detailed information about the use of Atenolol in children, pregnancy and breastfeeding, and for questions about drug interactions, please check with your pharmacist or doctor.

Disclaimer: our goal is to provide you with the most relevant drug information and common dosage for Hong Kong. This information does not constitute medical advice. For specific treatment recommendations and advice, always discuss with your doctor or pharmacist, and follow the instructions included with your specific medicine.

Brands in Hong Kong
Available dosage
  • 25mg/5ml (Oral Solution)
  • 50mg / 100mg (Tablets)
Drug class
Antihypertensives, Antiarrhythmics, Antianginal Agents
Sub class
Beta Blockers
Other drugs in same class
Used for: Ventricular arrhythmia, Supraventricular arrhythmia
Chinese name:
Used for: High blood pressure, Prevention and treatment of angina, Chronic heart failure
Chinese name:
Used for: High blood pressure, Prevention and treatment of angina, Chronic heart failure
Chinese name: