Flavoxate Side Effects

Not all side effects for flavoxate may be reported. You should always consult a doctor or healthcare professional for medical advice. Side effects can be reported to the FDA here.

For the Consumer

Applies to flavoxate: oral tablet

In addition to its needed effects, some unwanted effects may be caused by flavoxate. In the event that any of these side effects do occur, they may require medical attention.

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

Rare
  • 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 of the side effects that can occur with flavoxate may not need medical attention. As your body adjusts to the medicine during treatment these side effects may go away. Your health care professional may also be able to tell you about ways to reduce or prevent some of these side effects. If any of the following side effects continue, are bothersome or if you have any questions about them, check with your health care professional:

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

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.

Disclaimer: Every effort has been made to ensure that the information provided is accurate, up-to-date and complete, but no guarantee is made to that effect. In addition, the drug information contained herein may be time sensitive and should not be utilized as a reference resource beyond the date hereof. This material does not endorse drugs, diagnose patients, or recommend therapy. This information is a reference resource designed as supplement to, and not a substitute for, the expertise, skill , knowledge, and judgement of healthcare practitioners in patient care. The absence of a warning for a given drug or combination thereof in no way should be construed to indicate safety, effectiveness, or appropriateness for any given patient. Drugs.com does not assume any responsibility for any aspect of healthcare administered with the aid of materials provided. The information contained herein is not intended to cover all possible uses, directions, precautions, warnings, drug interactions, allergic reactions, or adverse effects. If you have questions about the substances you are taking, check with your doctor, nurse, or pharmacist.

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