> Western Medicines > Piperacillin


Used for: Gonorrhea, Bacterial infections, Prevention of surgical infections
Chinese name:

What is Piperacillin for?

Piperacillin belongs to a class of medications called penicillins. It kills bacteria by interrupting the integrity of bacterial cell walls. Piperacillin is used to treat a wide range of bacterial infections. Piperacillin does not work for virus or fungus infections.

Piperacillin is often used in combination with Tazobactam for the treatment of pneumonia and other infections.

How to use it?

Piperacillin is injected through a needle into a vein or muscle as directed by your doctor. Your doctor will advise you on the dosage and frequency depending on your infection.


Uncomplicated gonorrhoea
2 g as a single dose in combination with 1 g oral dose of Probenecid given before the injection.


Severe infections
200-300 mg/kg body weight daily in divided doses. At least 16 mg daily, and a maximum dosage of 24 g daily.


Mild or uncomplicated infections
100-125 mg/kg body weight daily.


Prevention of surgical infections
2 g just before the procedure, followed by at least 2 doses of 2 g every 4-6 hours within 24 hours of the procedure.

What are the side effects of Piperacillin?

Common side effects of Piperacillin include diarrhoea, nausea and vomiting, and allergic skin reactions.

Who should not take Piperacillin?

Anyone who has an allergy to Piperacillin or other penicillins.

Pharmacist Tips:

  • Antibiotics like Piperacillin may reduce the effectiveness of oral contraceptives. Consider using another form of contraception while taking Amoxicillin.
  • You must complete the entire course of this antibiotic, or else, the infection will not be properly controlled.

Common dosing schedule:
Your doctor will advise you on the dosage and frequency depending on your condition.


Some common medications Piperacillin may interact with:

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

Where to buy Piperacillin in Hong Kong?

In Hong Kong, Piperacillin 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 Piperacillin 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
  • 2g (Injections)
Drug class
Sub class
Other drugs in same class
Used for: Dental infections, Other bacterial infections, Urinary tract infections (UTIs), Ear infections, Helicobacter pylori (H. pylori) eradication, Respiratory tract infections
Chinese name:
Used for: Susceptible bacterial infections
Chinese name:
Amoxicillin+Clavulanic acid
Used for: Urinary tract infections (UTIs), Other bacterial infections, Ear infections, Respiratory tract infections, Helicobacter pylori (H. pylori) eradication, Dental infections
Used for: Urinary tract infections (UTIs), Intra-abdominal infections, Gonorrhea, Skin and soft tissue infections, Respiratory tract infections, Bone and joint infections
Chinese name:
Used for: Skin and soft tissue infections, Intra-abdominal infections, Appendicitis, Urinary tract infections (UTIs), Pneumonia