Flavoxate Side Effects

Brand Names: Urispas

Please note - some side effects for Flavoxate may not be reported. Always consult your doctor or healthcare specialist for medical advice. You may also report side effects to the FDA at http://www.fda.gov/medwatch/ or 1-800-FDA-1088 (1-800-332-1088).

Side Effects of Flavoxate - for the Consumer

Flavoxate

All medicines may cause side effects, but many people have no, or minor, side effects. Check with your doctor if any of these most COMMON side effects persist or become bothersome when using Flavoxate:

Blurred vision; constipation; decreased sweating; difficulty sleeping; dizziness; drowsiness; dry mouth; headache; loss of taste; nausea; nervousness.

Severe allergic reactions (rash; hives; itching; difficulty breathing; tightness in the chest; swelling of the mouth, face, lips, or tongue); diarrhea; difficulty focusing your eyes; difficulty urinating; rapid heart rate; unusual weakness; vomiting.

Flavoxate Side Effects - for the Professional

Flavoxate

The following adverse reactions have been observed, but there are not enough data to support an estimate of their frequency.

Gastrointestinal: Nausea, vomiting, dry mouth.

CNS: Vertigo, headache, mental confusion, especially in the elderly, drowsiness, nervousness.

Hematologic: Leukopenia (one case which was reversible upon discontinuation of the drug).

Cardiovascular: Tachycardia and palpitation.

Allergic: Urticaria and other dermatoses, eosinophilia and hyperpyrexia.

Ophthalmic: Increased ocular tension, blurred vision, disturbance in eye accommodation.

Renal: Dysuria.

Side Effects by Body System

General

Flavoxate is generally well tolerated and an estimated frequency of particular side effects is not available.

Cardiovascular

Cardiovascular side effects have included tachycardia and palpitation.

Gastrointestinal

Gastrointestinal side effects have included nausea, vomiting, and dry mouth.

Ocular

Ocular side effects have included increased ocular tension, blurred vision, and altered accommodation.

Nervous system

Nervous system side effects have included vertigo, headache, mental confusion, drowsiness, and nervousness. These effects may be exaggerated in elderly patients.

Renal

Renal side effects have included dysuria, and obstructive uropathies of the lower urinary tract.

Hypersensitivity

Hypersensitivity side effects have included urticaria and other unspecified dermatoses, eosinophilia, and elevated temperature.

Hematologic

Hematologic side effects have been reported rarely. A case of reversible leukopenia has been reported.

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