Isoptin

Used for: High blood pressure, Supraventricular arrhythmia, Prevention and treatment of angina, Atrial fibrillation
Chinese name:

What is Isoptin?

Isoptin is a brand product that contains Verapamil, which belongs to a class of medication called calcium channel blockers. It works by relaxing the smooth muscle in the heart to reduce heart workload. It is therefore used to treat and prevent angina, atrial fibrillation, and high blood pressure.

How to use it?

Isoptin is available as tablets or sustained-release tablets.


For angina: 
The starting dose for conventional tablets is 80-120mg three times a day. Dose can be adjusted at daily intervals based on response. For sustained-release tablets, Verapamil for angina is 180mg once daily. Dose can be adjusted at weekly intervals based on response. The maximum daily dose is 480mg.
 

For hypertension:
The starting dose for conventional tablets is 80mg three times a day. Dose can be adjusted at daily intervals based on response. For sustained-release tablets, Verapamil for angina is 120-360mg once daily. Dose can be adjusted at weekly intervals based on response. The maximum daily dose is 480mg.
 

For atrial fibrillation:
The starting dose is 240-320mg. The maximum daily dose is 480mg.

What are the side effects of Isoptin?

Common side effects of Isoptin include headache, oedema, constipation, fatigue, nausea and stomach discomfort.

Who should not take Isoptin?

  • People who are allergic to any component of Isoptin
  • Patients with certain heart conditions like cardiogenic shock, low blood pressure, heart rate slower than normal, heart block

Pharmacist Tips:

  • Continue taking Verapamil even when you feel well
  • Report to your doctor if you experience symptoms of hypotension, such as lightheadedness, blurred vision and sweating.

 

Common dosing schedule: 
Take with or without food, preferably in the evening.
 

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

 

Some common medications Isoptin may interact with:

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

Where to buy Isoptin in Hong Kong?

In Hong Kong, Isoptin 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 Isoptin 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
  • 40mg (Tablets)
  • 240mg (Sustained-Release Tablets)
Drug class
Antiarrhythmics, Antihypertensives, Antianginal Agents
Sub class
Calcium Channel Blockers
Generic Names
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