Medicines & Supplements A to Z > Tetracycline


Last updated on July 12, 2019.

Overview   |   Dosage   |   Side Effects   |   Where To Buy  


GENERIC NAME: Tetracycline


COMMON BRANDS IN HONG KONG: Medocycline, Tetracap, Nice-tetra

What is Tetracycline for?

Tetracycline is an antibiotic for treating a wide range of bacterial infections, including but not limited to the following: 

  • Rosacea 
  • Acne
  • Periodontitis 

Other susceptible infections (e.g. Mycoplasma pneumoniae, Chlamydia, Rickettsia)

How to use it?

Tetracycline can be taken by mouth, applied to the skin, or given by injection. Ideally it should be taken on an empty stomach to optimize absorption. However, stomach upset is a common side effect, so tetracycline can be taken with food. Do not take at the same time as dairy products and minerals such as calcium, magnesium, and iron, as this reduces absorption of tetracycline into the body.

The oral dosages for different uses and age groups are listed below: 

For rosacea 


500 mg twice daily for 6-12 weeks and the treatment course may be repeated intermittently. 

For acne 

Adult  / Child 12-17 years 

500 mg twice daily for 3 months. Another antibiotic should be used if there is no benefits are observed after 3 months. The maximum benefits usually occur after 4-6 months and may up to 2 years or longer in severe cases. Doses can be reduced gradually to 250 mg per day once improvement is seen.

For other susceptible infections

Adult / Child 12-17 years 

250 mg 4 times daily and may increase up to 500 mg 3-4 times daily in severe cases

What are the side effects of Tetracycline?

The most common side effect of Tetracycline is gastrointestinal including stomach pain, diarrhoea, and nausea and vomiting. Tetracycline can cause sensitivity to sunlight, and wearing sunscreen is recommended.

Where to buy Tetracycline in Hong Kong?

In Hong Kong, Tetracycline 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

For detailed information about the use of Tetracycline 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.