Hiprex (Methenamine Hippurate)

Complete patient guide for uses, dosage, side effects, and safety information

Prescription Required

Quick Facts

Generic Name

methenamine hippurate

Drug Class

urinary antibacterial agent

Used For

prevention or suppression of bacteria in the urine causing urinary tract infections

How Taken

oral tablet, 1 tablet twice daily

What Is Hiprex Used For?

Hiprex is used to prevent or suppress bacteria in the urine that can lead to chronic or recurrent urinary tract infections (UTIs).

Primary Uses

Hiprex is primarily used for the prevention and treatment of urinary tract infections.

How It Works

Hiprex works by breaking down into formaldehyde in acidic urine, which helps eliminate bacteria.

Good to know: Hiprex is not addictive.

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How to Take Hiprex

Take Hiprex as directed by your healthcare provider, typically as an oral tablet.

Dosage Instructions

Adults and children aged 12 years or older should take 1 tablet twice daily, with or without food. Swallow the tablet whole with a glass of water. It is not recommended for children under 12 years.

What If You Miss a Dose?

If you miss a dose, take it as soon as you remember. If it's almost time for your next dose, skip the missed dose and continue with your regular schedule. Do not double the dose.

Important: Do not exceed the recommended dosage.

Available Tablet Strengths

5mg

5mg Tablet Blue, Round • A-007

10mg

10mg Tablet Pink, Rectangular • A-008

15mg

15mg Tablet Yellow, Round • A-009

20mg

20mg Tablet White, Round • A-010

30mg

30mg Tablet Pink, Round • A-011

Side Effects

Like all medications, this medicine can cause side effects. Most are mild and temporary, but some require medical attention.

Common Side Effects

These side effects occur relatively frequently and usually don’t require emergency care:

Painful or difficult urination
Diarrhoea
Nausea
Vomiting
Abdominal pain
Stomach irritation
Itchy skin
Rashes

Seek immediate medical attention if you experience:

Blood in urine (haematuria)

Important Warnings

There are specific conditions and allergies that may prevent you from taking Hiprex.

Who Should Not Take Hiprex

Do not use Hiprex if you are allergic to methenamine hippurate, formaldehyde, or any other ingredients in the product. Avoid use if you have severe kidney failure, kidney infections, severe dehydration, gout, neurogenic bladder, renal tract abnormalities, long-term catheters, severe liver impairment, or metabolic acidosis.

Medical Conditions to Discuss

Consult your doctor if you have any other medical conditions or are taking other medications, especially for recurrent urinary tract infections.

Pregnancy and Breastfeeding

Consult your doctor or pharmacist if you are pregnant or breastfeeding, as methenamine is found in breast milk in very small amounts.

Drug Interactions

Some medications may interact with Hiprex and affect its effectiveness.

Alkalising agents
Antacids

Alcohol & Driving

Be cautious when driving or operating machinery until you know how Hiprex affects you.

Alcohol

There are no specific warnings regarding alcohol consumption mentioned.

Driving and Operating Machinery

Hiprex is not expected to impair your ability to drive or operate machinery.

Storage

Store Hiprex below 30 °C in a tightly closed container. Keep it in a cool, dry place away from moisture, heat, or sunlight. Do not store in the bathroom or near sinks.

Overdose Information

If you suspect an overdose, seek immediate medical attention. Contact the Poisons Information Centre at 13 11 26 or go to the nearest hospital emergency department, even if no symptoms are present.

Frequently Asked Questions

Hiprex begins to work by suppressing bacteria in the urine, but the exact time may vary by individual.

You can take Hiprex with or without food.

No, Hiprex is not considered addictive.

Consult your doctor before stopping Hiprex to discuss any potential effects.