Patient leaflet - Methenamine Hippurate 1 g tablets
1. What Methenamine hippurate is and what it is used for
Methenamine hippurate belongs to a group of medicines called anti-bacterials. These work by killing many different types of bacteria which cause infections. Methenamine hippurate is used to treat infections of the urinary tract and stop them from coming back. The urinary tract is a collective name for the parts of the body that produce, store and transport urine. These include the kidney, bladder and tubes called the ureter and urethra. It is also used to avoid urinary tract infections in patients with catheters from their bladders (a tube that helps with incontinence) and in people undergoing certain medical procedures.
2. What you need to know before you take Methenamine hippurate
Do not use Methenamine hippurate if:
You are allergic to methenamine hippurate or any of the
other ingredients of this medicine (listed in section 6) · You are taking antibiotic medicines called sulphonamides.
These can damage your kidneys when taken at the same time as methenamine hippurate
- You are severely dehydrated
- You have serious problems with your kidneys · You have problems with your liver
- You have gout
You have a condition called metabolic acidosis (a chemical
imbalance in the blood).
If any of the above applies to you, talk to your doctor or pharmacist.
Warnings and precautions
Talk to your doctor or pharmacist before taking Methenamine hippurate if:
- You have any kinds of problems with your kidneys.
Tell your doctor if you are taking any of the following medicines:
Medicines to make your urine less acidic such as potassium
citrate and acetazolamide.
These can stop Methenamine hippurate working properly.
Any other medicines, including medicines obtained without a
prescription.
You are taking medicines called sulphonamides. This
medicine may interact with Methenamine hippurate and contribute to the formation of crystals in the urine (crystalluria), potentially leading to kidney problems.
Pregnancy, breast-feeding and fertility
If you are pregnant or breast-feeding, think you may be pregnant or are planning to have a baby, ask your doctor or pharmacist for advice before taking this medicine.
3. How to take Methenamine hippurate
Always take Methenamine hippurate exactly as your doctor or pharmacist has told you. You should check with your doctor or pharmacist if you are not sure.
Important:
Your doctor will choose the dose that is right for you. Your dose will be shown clearly on the label that your pharmacist puts on your medicine. If it does not, or you are not sure, ask your doctor or pharmacist.
Adults
The recommended dose is one tablet twice a day. If you have a catheter your doctor may increase your dose to one tablet three times a day.
Use in children
Not for children aged under 6.
Children aged 6 - 12 years the recommended dose is half a tablet (500mg) twice a day.
Method of administration
The tablets can be broken in half. If you find it particularly difficult to swallow them, the tablets may be crushed and taken with a drink of milk or fruit juice.
If you take more Methenamine hippurate than you should
If you accidentally take more Methenamine hippurate than you should you might be sick or see blood in your urine. Drink plenty of water and immediately go to the nearest hospital casualty department or your doctor. Your doctor may give you another medicine to stop you being sick.
If you forget to take Methenamine hippurate
Do not take a double dose to make up for a missed dose. Simply take your next dose as planned.
If you stop taking Methenamine hippurate
Your doctor will tell you how long to take your medicine for. Do not stop taking Methenamine hippurate without first talking to your doctor.
If you have further questions on the use of this medicine, ask your doctor or pharmacist.
4. Possible side effects
Like all medicines, this medicine can cause side effects, although not everybody gets them.
Size: 165(L) x 320(W) mm
Front Side
Package leaflet: Information for the patient
Methenamine hippurate 1 g tablets
Methenamine hippurate
You may experience the following:
Uncommon: may affect up to 1 in 100 people
- Rashes
- Itching
- Stomach irritation
- Bladder irritation usually seen as a burning sensation and pain on urinating.
- Nausea
- Vomiting
Not known (cannot be estimated from the available data) · Diarrhoea, abdominal pain
Reporting of side effects
If you get any side effects, talk to your doctor, pharmacist or nurse. This includes any possible side effects not listed in this leaflet. You can also report side effects directly via the Yellow Card Scheme at: www.mhra.gov.uk/yellowcard or search for MHRA Yellow Card in the Google Play or Apple App Store.
By reporting side effects, you can help provide more information on the safety of this medicine.
5. How to store Methenamine hippurate
- Keep this medicine out of the sight and reach of children.
- Do not use this medicine after the expiry date which is stated on the blister, carton, and bottle label after EXP. The expiry date refers to the last day of that month. · This medicine does not require any special storage conditions.
- Medicines should not be disposed of via wastewater or household waste. Return any medicine you no longer need to your pharmacist.
6. Contents of the pack and other information
What Methenamine hippurate contains
The active substance is methenamine hippurate. Each tablet contains 1 g methenamine hippurate.
The other ingredients are colloidal silicon dioxide, povidone and magnesium stearate.
What Methenamine hippurate looks like and contents of the pack
White to off- white colored, capsule shaped, biconvex tablets, debossed with “H” and “1” on either side of breakline on one side and plain on other side with approximate length 20.00 mm & width 8.00 mm.
The tablet can be divided into equal doses.
Methenamine hippurate tablets are available in blister pack and HDPE bottle pack with a polypropylene screw cap.
Pack sizes:
Blister packs: 7, 8, 10, 20, 21, 60, 100 and 105 tablets. HDPE packs: 60 and 100 tablets.
Not all pack sizes may be marketed.
Marketing Authorisation Holder and Manufacturer:
Brown & Burk UK Limited
5 Marryat Close
Hounslow
TW4 5DQ
United Kingdom
This leaflet was last revised in 09/2026.
165 mm
BBUKCODE
Size: 165(L) x 320(W) mm Back Side
Methenamine Hippurate Tablets - BBUK_POM
1 g
Outsert (HDPE Container)
165(L) x 320(W) mm
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