Medicines & Supplements A to Z > Sucralfate


Last updated on 25/07/2021.

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

GENERIC NAME: Sucralfate

CHINESE NAME: 斯克拉非, 硫糖鋁


DRUG CLASS: Gastrointestinal Drugs

SUB CLASS: Acid buffers

USED FOR: Stomach ulcer, Gastric ulcer, Peptic ulcer

AVAILABLE DOSAGE FORMS: 500mg, 1g (tablets)

What is Sucralfate for?

Sucralfate is used for treating non-NSAID-related duodenal ulcers. Since this type of ulcer usually involves excessive acid secretion, it reacts with acid to give a 6-8 hour buffer. It also binds with proteins in the stomach to form an insoluble protective layer against acids.

How to use it?

It is available in tablets for oral use. It should be taken on an empty stomach, which is 1 hour before or 2 hours after meals, with water.

Benign gastric ulcer and duodenal ulcer
Adult and Child at 15-17 years of age
Take 2 g after waking up and before sleep for 4-12 weeks. Maximum 8 g daily.
Take 1 g 1 hour before main meals and before sleep for 4-12 weeks, up to 12 weeks. Maximum 8 g daily.

What are the side effects of Sucralfate?

Common side effects of Sucralfate include constipation, dry mouth, nausea and rash.

Who should not take Sucralfate?

People who are allergic to sucralfate and any components in the formulation

Pharmacist Tips:

– Although sucralfate is an over the counter medicine, pregnant women are advised to seek medical attention and avoid self-purchased medications.
– If there are any alarming symptoms, such as dark stool and pain exacerbation, seek medical attention.
– Dose adjustment is needed for patients with diabetes, kidney disease or duodenal ulcer. 

Common dosing schedule:
Sucralfate is taken twice daily or 4 times daily. If twice daily, it is taken after waking up and before sleep. If 4 times daily, it is taken before main meals and before sleep. It should be taken on an empty stomach, which is 1 hour before or 2 hours after meals, with water.

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

Some common medications Sucralfate may interact with:
– Fluoroquinolone antibiotics, e.g. Ciprofloxacin, Delafloxacin
– Tetracycline antibiotics, e.g. Doxycycline, Tetracycline
– Citrates, e.g. Sodium citrate, Potassium citrate

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

Where to buy Sucralfate in Hong Kong?

In Hong Kong, Sucralfate 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

Need more information?

For detailed information about the use of Sucralfate 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.