What it is used for
- Reducing sudden urinary urgency
- Reducing frequent urination
- Treating urgency incontinence caused by overactive bladder
How it is used
- Take the prolonged-release tablet as prescribed at a regular time
- Swallow the tablet whole with water; do not crush, chew or split it
- It may be taken with or without food, and avoid grapefruit if your clinician advises it
- Do not stop or change it without speaking to your clinician even if improvement takes time
Possible side effects
- Dry mouth
- Constipation, abdominal pain or indigestion
- Headache or dizziness
- Dry eyes or blurred vision
- Difficulty passing urine or urinary retention
Who should not use it
- Urinary retention or severe gastric retention
- Uncontrolled narrow-angle glaucoma
- Myasthenia gravis, severe ulcerative colitis or toxic megacolon
- Severe liver impairment or use of a strong inhibitor of the liver enzyme that clears it
Before and while using it
- Tell your clinician about difficulty emptying the bladder, urinary obstruction or severe constipation before treatment
- Seek help if you cannot pass urine or develop severe abdominal pain and swelling
- It can reduce sweating and increase the risk of heat illness in hot weather
- It can cause blurred vision, dizziness or sleepiness; do not drive if affected
- Seek urgent help for swelling of the face or tongue or difficulty breathing
Medicine interactions
- Some antibiotics, antifungals and antiviral medicines can greatly raise its level
- Other anticholinergic medicines can worsen dry mouth, constipation and urinary retention
- Some medicines for depression, psychosis or heart conditions may need dose review or monitoring
- Grapefruit can raise the medicine level; follow your clinician's advice
Pregnancy and breastfeeding
- Tell your clinician if you are pregnant or planning pregnancy; it is generally avoided because information is limited
- Use during breastfeeding requires caution after weighing treatment benefit and possible risk
How to store it
- Keep in the original pack, away from moisture and children's reach
Get medical help straight away if
- Your face, lips or tongue swell, or you find it hard to breathe.
- You get a severe rash, blistering or peeling skin.
- A side effect worries you or doesn’t go away: contact your doctor or pharmacist.
Questions about this medicine?
Talk to a doctor by video, or send your question by text.
Source: Standard international medicine references
This guide is general information and doesn’t replace advice from your doctor or pharmacist. Don’t start, stop or change a medicine without asking them, and always read the leaflet in the pack.