What does it do?

Oxybutynin is used to treat incontinence (peeing when you don't want to). It reduces the urge and how often you need to pee.

Before you start

• Tell your doctor if you have prostate or bowel problems, or angle-closure glaucoma.
• Tell your doctor if you are pregnant, planning to become pregnant, or breastfeeding.

How should you take it?

Take oxybutynin regularly as directed. You can take it with or without food.
Tablets: Take with a glass of water.
Liquid: Measure carefully with an oral syringe or measuring spoon.

What if you forget a dose?

If it is nearly time for your next dose, skip the missed dose and take your next dose at the usual time. Otherwise, take the missed dose as soon as you remember. Do not take two doses at the same time.

Can you take other medicines?

Some medicines available without a prescription may react with oxybutynin including:

• some antihistamines or anti-nausea medicines such as promethazine (e.g. Phenergan®), hyoscine (e.g. Scopoderm®), meclozine (e.g. Sea-legs®)

Tell your pharmacist or doctor about all medicines or treatments that you may be taking, including vitamins, herbal products (e.g. St John's wort) or recreational drugs.

What side effects might you notice?

Side Effects	Recommended action
Confusion	Tell your doctor
Dry mouth, blurred vision, constipation or trouble peeing (anticholinergic effects) Dizziness, drowsiness, tiredness or weakness Headache Stomach upset	Tell your doctor if troublesome

If you notice any other effects, discuss them with your doctor or pharmacist.

Other information:

• Oxybutynin can impair your ability to do tasks such as driving or using machines. Alcohol makes this worse. Discuss your risk with your health professional. (search NZTA - Are you safe to drive?)