> Western Medicines > Fluoxetine

What is Fluoxetine for?

Fluoxetine belongs to a class of medications called Selective Serotonin Reuptake Inhibitors (SSRI). It treats depression by selectively increasing the amount of a neurotransmitter called Serotonin that correlates with better mood and feelings of satisfaction and calmness. It is also used in many different psychological illnesses.

How to use it?

Fluoxetine can be taken orally.


For depression, the usual starting dose is 20mg once daily, then gradually increased based on response up to 80mg daily.


For panic disorder, the usual starting dose is 5-10mg once daily, then gradually increased based on response up to 60mg daily.

What are the side effects of Fluoxetine?

Common side effects include dizziness, drowsiness, dry mouth, constipation, lowered interest in sex, and sleep disturbance.

Who should not take Fluoxetine?

Anyone who has an allergy to Fluoxetine or any other components of the drug.

Pharmacist Tips:

It might take a few weeks for Fluoxetine to reach its full effect. Do not stop taking Fluoxetine suddenly as you may suffer from withdrawal symptoms, such as nausea and dizziness.


Common dosing schedule:

Fluoxetine can be taken with or without food.

Do not drink alcohol as it may worsen your mood or anxiety.


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


Some common medications that Desvenlafaxine may interact with:

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

Where to buy Fluoxetine in Hong Kong?

In Hong Kong, Fluoxetine 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 Fluoxetine 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
  • 10mg / 20mg (Capsules)
Drug class
Sub class
Selective Serotonin Reuptake Inhibitors (SSRIs)