> Western Medicines > Phenazopyridine


Chinese name:

What is Phenazopyridine for?

Phenazopyridine is a urinary analgesic (pain reliever) that can be used to relieve pain and irritation due to urinary tract infections (UTIs) including inflammation of the bladder, prostates, and urethra.

How to use it?

Phenazopyridine can be taken by mouth as tablets or capsules. The usual adult dose is 200 mg three times per day after meals. The usual duration of use is 2 days if Phenazopyridine is used together with an antibiotic to treat a bladder infection.

What are the side effects of Phenazopyridine?

The most common side effect of Phenazopyridine is a headache or mild intestinal discomfort. It will also cause your urine to turn a reddish-orange colour.

Who should not take Phenazopyridine?

  • People who are allergic to Phenazopyridine or any formulation component
  • People with G6PD deficiency
  • Patients with poor kidney function

Pharmacist Tips:

  • Phenazopyridine will turn body fluids into an orange or red colour, including tears and sweat. It may also stain your contact lenses.
  • This medication has no effect on suppressing or killing the bacteria that cause urinary tract infections (UTIs). If you develop symptoms of a UTI, you are advised to see a doctor for antibiotic treatment.

Common dosing schedule:
Take Phenazopyridine with food to minimise gastrointestinal side effects


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


Some common medications Phenazopyridine may interact with:

  • Sodium Nitrite

Where to buy Phenazopyridine in Hong Kong?

In Hong Kong, Phenazopyridine is an over-the-counter medicine which 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 Phenazopyridine 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
  • 50mg / 100mg (Tablets)
Drug class
Sub class
Azo Dyes
Other drugs in same class