Used for: Prevention and treatment of angina
Chinese name:

What is Elantan for?

Elantan is a brand medication that contains Isosorbide Mononitrate, which belongs to a class of medications called nitrates. It works by producing a vasodilator effect on the peripheral veins and arteries and relaxes vascular smooth muscle to increase oxygen supply to the heart. It is used to prevent and treat angina.

How to use it?

Elantan is available as conventional tablets. Take on an empty stomach.


For conventional tablets, start with 20 mg twice daily with the 2 doses given at least 7 hours apart.

What are the side effects of Elantan?

Common side effects of Elantan include nausea, headache, dizziness, angina, bradycardia, and shortness of breath.

Who should not take Elantan?

  • Anyone who is allergic to any component of Elantan
  • People who are taking Riociguat, a medicine for pulmonary hypertension
  • People who are taking medicines for erectile dysfunction (e.g. Avanafil, Sildenafil, Tadalafil, Vardenafil)

Pharmacist Tips:

  • In the event of an angina attack, it is advised to take Glyceryl Trinitrate spray and tablets immediately and seek medical attention.
  • It is important to have a nitrate-free period (period when you are not taking this medication) to minimize tolerance.

Common dosing schedule:
Elantan is taken on an empty stomach, at least 30 minutes before or 2 hours after food.


For immediate-release tablets, consider to schedule the twice daily doses at least 7 hours apart, for example administering at 8 am and 3 pm.


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


Some common medications Elantan may interact with:

Please notify your doctor or pharmacist if you are taking the above medication, dosage adjustments might be needed.

Where to buy Elantan in Hong Kong?

In Hong Kong, Isosorbide Mononitrate is a medicine under supervised sales and can be purchased under the supervision of a pharmacist from any pharmacies in Hong Kong. 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 Elantan 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.

Available dosage
  • 20mg (Tablets)
Drug class
Antianginal Agents
Sub class
Other drugs in same class
Glyceryl Trinitrate
Used for: Prevention and treatment of angina
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Isosorbide dinitrate
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Isosorbide Mononitrate
Used for: Prevention and treatment of angina
Chinese name: