Medicines & Supplements A to Z > Fluimucil


Last updated on 13/10/2021.

Overview   |   Dosage   |    Side Effects   |   Precautions  |   Tips  |   Where To Buy  

GENERIC NAME: Acetylcysteine


DRUG CLASS: Antitussives

SUB CLASS: Mucolytics

USED FOR: Productive cough

– 100mg, 200mg (granules)
– 600mg (effervescent tablet)
– 300mg/3ml (injection)

What is Fluimucil for?

Flumiucil is a brand product that contains Acetylcysteine, which is a type of mucolytic. It works by thinning the mucus to make it easier to cough out, and therefore used in productive coughs.

How to use it?

Fluimucil is taken orally by mouth (injection is only used as an antidote for acute Paracetamol overdose). The usual daily dose is 600mg, taken either as 600 mg once daily or 200mg three times a day.

For effervescent tablets, dissolve one tablet in water immediately before use.

What are the side effects of Fluimucil?

Oral Fluimucil is generally safe and does not cause any noticeable side effects, though nausea and vomiting might happen.

A rare but concerning side effect of Fluimucil by injection is anaphylaxis (e.g. itching, flushing, hives, difficulty breathing).

Who should not take Fluimucil?

People who are allergic to acetylcysteine or any component of the formulation.

Pharmacist Tips:

– While taking this medicine, you must also stay hydrated in order to make the mucus cough out easier.
– There may be a bad odor to this drug. This most often goes away fast.
– Do not use boiling water for dissolving effervescent tablets. 

Common dosing schedule:
Fluimucil can be taken with or without food.

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

Some common medications Fluimucil may interact with:
No known significant interactions.

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

Where to buy Fluimucil in Hong Kong?

In Hong Kong, Fluimucil granules and effervescent tablets are over-the-counter medicines and can be purchased without a prescription from any retail outlet in Hong Kong. This includes grocery stores, convenience stores, medicine shops, and pharmacies. Fluimucil injection 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

Need more information?

For detailed information about the use of Fluimucil 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.