> Western Medicines > Carboxymethylcellulose


Used for: Dry eyes
Chinese name:

What is Carboxymethylcellulose for?

Carboxymethylcellulose is a type of artificial tear that can lubricate your eyes to relieve dry eyes and protect against further eye irritation.

How to use it?

Carboxymethylcellulose can be applied to the eyes as eye drops. Instil 1-2 drops into the affected eye(s) 3-4 times daily as needed.


Lie down or tilt your head back. With your index finger, pull down the lower lid of your eye. Hold the dropper close to your eye with the other hand, and drop 1 drop into your eyes between your lower lid and eyeball. Gently close your eyes, and apply finger pressure to the inner corner of your eye for 1-2 minutes.

What are the side effects of Carboxymethylcellulose?

Common side effects of Carboxymethylcellulose include vision change or eye pain.

Who should not take Carboxymethylcellulose?

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

Pharmacist Tips:

  • Wash hands before and after use.
  • Remove contact lenses prior to administration, and wait 15 minutes before reinserting.
  • Separate administration of other ophthalmic agents by at least 5-10 minutes.
  • To avoid contamination, do not touch the tip of the tube to the eye or any other surface.

Common dosing schedule:
Carboxymethylcellulose can be instilled at any time of the day.


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


Some common medications Carboxymethylcellulose may interact with:

  • No known significant interactions.

Where to buy Carboxymethylcellulose in Hong Kong?

In Hong Kong, Carboxymethylcellulose is an over-the-counter medicine and can be purchased without a prescription from any retail outlet in Hong Kong. This includes grocery stores, convenience stores, medicine shops, and pharmacies. 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 Carboxymethylcellulose 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
Refresh Plus
Available dosage
  • 0.5% / 1% (Eye Drops)
Drug class
Eye Lubricants
Sub class
Artificial Tears
Alternative Names
Carmellose, CMC
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