> Western Medicines > Frusemide


Used for: Oedema, High blood pressure
Chinese name:

What is Frusemide for?

Frusemide belongs to a class of medications called loop diuretics. It works by balancing the amount of salt and water in your body resulting in an increase in the volume of your urine output. Frusemide can be used to treat oedema and high blood pressure.

How to use it?

Frusemide can be taken by mouth as tablets or given by injection. Since Frusemide is a very effective diuretic, your dose will be adjusted based on your response. Usual adult oral doses range from 20 to 40 mg daily in the morning. For maintenance dosing, Frusemide can be taken once or twice daily. If taken twice daily, most people take the second dose around lunchtime so as to avoid excessive urination overnight.

What are the side effects of Frusemide?

Common side effects of Frusemide include dizziness, electrolyte imbalance (low potassium), fatigue, headache, metabolic alkalosis, muscle spasms, and nausea.

Who should not take Frusemide?

  • People who are allergic to Frusemide or any ingredient of the formulation
  • Patients with anuria (reduced urine production)

Pharmacist Tips:

  • Inform your doctor immediately if you hear a ringing sound or your hearing is impaired.
  • Continue taking Frusemide even when you feel well.

Common dosing schedule:
You may take Frusemide with or without food.

Do not take Frusemide in the late afternoon to avoid going to the toilet while sleeping.


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


Some common medications Frusemide may interact with:

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

Where to buy Frusemide in Hong Kong?

In Hong Kong, Frusemide 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 Frusemide 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
  • 20mg/2ml (Injections)
  • 40mg / 500mg (Tablets)
Drug class
Sub class
Loop Diuretics
Alternative Names
Other drugs in same class
Used for: Oedema, High blood pressure
Chinese name: