Toviaz (Fesoterodine Fumarate)

(℞) Prescription Required

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    Toviaz (Fesoterodine Fumarate) Dosage and Side Effects

    TOVIAZ is used for the treatment of the symptoms of overactive bladder which include frequency, urgency, and urge incontinence or any combinations of these symptoms.

    Toviaz Dosage

    REMEMBER: This medication is for YOU. Never give it to others. It may harm them even if their symptoms are the same as yours.

    Usual dose:

    The usual starting dose is 4 mg once daily.

    Take with liquid and swallow the tablet whole. You can take with or without food. Based upon your response and tolerability, your doctor may increase your dose to 8 mg once daily. The maximum dose is 8 mg once daily.

    Your doctor may give you the lower 4 mg dose if you have certain medical conditions, such as severe kidney problems.

    Take as instructed by your doctor. Do not increase, decrease or stop taking without first talking to your doctor.


    If you take too many tablets by accident, call your doctor or pharmacist or a poison control centre or emergency room of the nearest hospital immediately.

    Missed dose:

    If you miss taking your tablet, take it as soon as you remember. But if it is almost time for the next dose, skip the missed dose and just take the next dose. Do not take more than one dose at a time.

    Side Effects

    As with most drugs, this medication can cause some side effects.

    A very common side effect is dry mouth. Common side effects are constipation, urinary tract infection, dry eyes, upset stomach, dry throat, nausea, upper respiratory tract infection, painful urination, difficulty emptying your bladder, swelling of the extremities, and skin rash. Uncommon side effects are cough, back pain, abdominal pain, and insomnia. Other side effects that have been reported after the drug was marketed include: blurred vision, dizziness, headache, heart palpitations, angioedema, hypersensitivity reactions, hives, and itching.

    If you experience dry mouth, there are a few ways that might help relieve the symptoms:

    • Carry a bottle of water and sip a little bit throughout the day or suck on ice chips to provide moisture
    • Chew sugarless gum or suck on sugarless hard candy to stimulate saliva production
    • Avoid eating salty or spicy foods
    • Avoid drinking carbonated, caffeinated and alcoholic beverages
    • Avoid using mouth rinses that contain alcohol, as they may dry out the mouth
    • Use a humidifier at night
    • Ask your pharmacist to recommend an over-the-counter saliva substitute or oral lubricant

    Check with your doctor or pharmacist right away if you have any bothersome or unusual effects.

    Warnings and Precautions

    BEFORE you use this medicine talk to your doctor or pharmacist if:

    • you are pregnant, or trying to become pregnant
    • you are breastfeeding your child
    • you have myasthenia gravis (a chronic autoimmune neuromuscular disease which causes muscle weakness)
    • you have stomach problems affecting passage and digestion of food
    • you have or have had abnormal increases in heart rate or ischemic heart disease (e.g. angina)
    • you have severe liver problems
    • you have severe kidney problems
    • you have problems emptying your bladder or if you have weak urine stream
    • you are receiving treatment for an eye problem called narrow-angle glaucoma
    • you have a rare hereditary problem of galactose intolerance or the Lapp lactase deficiency.
    • you have a family history of soya intolerance or if you are allergic to soya or peanuts. 

    This medication can cause angioedema (swelling of face or tongue, difficulty breathing) and anaphylactic reactions (hives, difficulty breathing, abdominal cramps, rapid heartbeat and feeling faint). If you experience any of these symptoms, stop taking and see you doctor immediately.

    It should not be given to patients under 18 years of age.

    Do not drive a car or operate any machinery until you know how this medication affects you.

    Interactions with this medication

    The following list includes some, but not all, of the drugs that may increase the risk of side effects. You should check with your doctor or pharmacist before taking any other medication.

    Drugs that may interact include:

    • other drugs that possess antimuscarinic/anticholinergic properties (drugs that cause blurred vision, constipation, dry mouth, etc.)
    • antifungals (drugs to treat fungal infections, such as, fluconazole, ketoconazole, miconazole or itraconazole)
    • antibiotics (ie. erythromycin, clarithromycin)
    • vinblastine (a drug to treat some types of cancer)
    • antidepressants (mood disorder drugs)
    • antipsychotics (drugs to stabilize thinking and behavior)
    • medications bought without a prescription or natural health product.

    The above information is an educational aid only. It is not intended as medical advice for individual conditions or treatments. Talk to your doctor, nurse or pharmacist before following any medical regimen to see if it is safe and effective for you.

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