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Urispas Side Effects

Generic Name: flavoxate

Note: This page contains side effects data for the generic drug flavoxate. It is possible that some of the dosage forms included below may not apply to the brand name Urispas.

It is possible that some side effects of Urispas may not have been reported. These can be reported to the FDA here. Always consult a healthcare professional for medical advice.

For the Consumer

Applies to flavoxate: oral tablet

As well as its needed effects, flavoxate (the active ingredient contained in Urispas) may cause unwanted side effects that require medical attention.

If any of the following side effects occur while taking flavoxate, check with your doctor or nurse as soon as possible:

  • Confusion
  • eye pain
  • skin rash or hives
  • sore throat and fever
Symptoms of overdose
  • Clumsiness or unsteadiness
  • dizziness (severe)
  • drowsiness (severe)
  • fever
  • flushing or redness of face
  • hallucinations (seeing, hearing, or feeling things that are not there)
  • shortness of breath or troubled breathing
  • unusual excitement, nervousness, restlessness, or irritability

Some flavoxate side effects may not need any medical attention. As your body gets used to the medicine these side effects may disappear. Your health care professional may be able to help you prevent or reduce these side effects, but do check with them if any of the following side effects continue, or if you are concerned about them:

More common
  • Drowsiness
  • dryness of mouth and throat
Less common or rare
  • Blurred vision
  • constipation
  • difficult urination
  • difficulty concentrating
  • dizziness
  • fast heartbeat
  • headache
  • increased sensitivity of eyes to light
  • increased sweating
  • nausea or vomiting
  • nervousness
  • stomach pain

For Healthcare Professionals

Applies to flavoxate: oral tablet


Flavoxate (the active ingredient contained in Urispas) is generally well tolerated and an estimated frequency of particular side effects is not available.


Cardiovascular side effects have included tachycardia and palpitation.


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


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


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


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

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